Traxxas 85086-4 operation manual

MODEL 85086-4

owner’s manual

INTRODUCTION

TABLE OF CONTENTS

3 BEFORE YOU

PROCEED

4

SAFETY

PRECAUTIONS

7

TOOLS, SUPPLIES, AND

REQUIRED EQUIPMENT

8 ANATOMY OF

THE UNLIMITED

DESERT RACER

10

QUICK START:

GETTING UP TO SPEED

11

TQi RADIO AND

VELINEON POWER

SYSTEM

20

ADJUSTING THE

ELECTRONIC SPEED

CONTROL

23

DRIVING YOUR MODEL

26 BASIC TUNING

ADJUSTMENTS

28 MAINTAINING

YOUR MODEL

ADVANCED TUNING

29

ADJUSTMENTS

31 TQi ADVANCED

TUNING GUIDE

2 • DESERT RACER

Thank you for purchasing the Traxxas Unlimited Desert Racer
equipped with the Velineon
Unlimited Desert Racer combines the look and feel of a full-scale
Baja truck with huge Pro-Scale™ size and blistering pro-level
performance. From the realistic cockpit, spare tires, and fire

®

VXL-6s Brushless Power System. The

Traxxas Support

Traxxas support is with you every step of the
way. Refer to the next page to find out how to
contact us and what your support options are.

extinguishers to the limiting straps on the rear axles, scale parts
are rendered in extreme detail. If it’s on a real Baja truck, it’s on the
Traxxas Unlimited Desert Racer.

This manual contains the instructions you will need to operate and
maintain your model so that you can enjoy it for years to come.
We want you to feel confident that you own one of the best­performing models in the market and that it is backed by a team
of professionals who aim to provide the highest level of factory
support possible. Traxxas models are about experiencing total
performance and satisfaction, not just with your model, but also

Quick Start

This manual is designed with a Quick
Start path that outlines the necessary
procedures to get your model up
and running in the shortest time possible. If you are an
experienced RC enthusiast, you will find it helpful and fast.
Be sure and read through the rest of the manual to learn
about important safety, maintenance, and adjustment
procedures. Turn to page 10 to begin.

with the company that stands behind it.

We know you’re excited about getting your new model on
the road, but it’s very important that you take some time to
read through the Owner’s Manual. This manual contains all the
necessary setup and operating procedures that will allow you to
unlock the performance potential that Traxxas engineers designed
into your model. Also be sure to read and follow the precautions
and warnings in this manual and on any labels or tags attached to
your model. They are there to educate you on how to operate your
model safely and also get maximum life and performance from

REGISTERING YOUR MODEL

In order to serve you better as our customer, please
register your product within 10 days of your purchase
online at Traxxas.com/register.

Traxxas.com/register

your model.

Even if you are an experienced RC enthusiast, it’s important to
read and follow the procedures in this manual.

Thank you again for going with Traxxas. We work hard every day
to assure you receive the highest level of customer satisfaction
possible. We truly want you to enjoy your new model!

FCC Compliance

This device contains a module that complies with the limits for a Class B digital device as described in part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

The limits for a Class B digital device are designed to provide reasonable protection against harmful interference in residential settings. This product generates, uses and can radiate radio frequency energy, and, if
not operated in accordance with the instructions, may cause harmful interference to radio communications. The user is cautioned that changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

Canada, Industry Canada (IC)

This Class B digital apparatus complies with Canadian ICES-003 and RSS-210. This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: This
device may not cause interference, and This device must accept any interference, including interference that may cause undesired operation of the device.

Radio Frequency (RF) Exposure Statement

This equipment complies with radio frequency exposure limits set forth by FCC and Industry Canada for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of
20 centimeters between the radiator and your body or bystanders and must not be co-located or operating in conjunction with any other antenna or transmitter.

Operation Frequency: 2414~2453 MHz
Maximum Radio Frequency Power: Maximum Peak Power 9.7 dBm

BEFORE YOU PROCEED

Carefully read and follow all instructions in this and any
accompanying materials to prevent serious damage to your
model. Failure to follow these instructions will be considered
abuse and/or neglect.

Before running your model, look over this entire manual and
examine the model carefully. If for some reason you decide it is not
what you wanted, then do not continue any further. Your hobby

dealer absolutely cannot accept a model for return or exchange
after it has been run.

WARNINGS, HELPFUL HINTS,

& CROSS-REFERENCES

Throughout this manual, you’ll notice warnings and helpful hints
identified by the icons below. Be sure to read them!

An important warning about personal safety or avoiding
damage to your model and related components.

Special advice from Traxxas to make things easier
and more fun.

Refers you to a page with a related topic.

SUPPORT

If you have any questions about your model or its operation,
call the Traxxas Technical Support Line toll-free at:
1-888-TRAXXAS (1-888-872-9927)*

Technical support is available Monday through Friday from
8:30am to 9:00pm central time. Technical assistance is also available
at Traxxas.com/support. You may also e-mail customer support with
your question at [e-mail]. Join thousands of registered
members in our online community at Traxxas.com.

Traxxas offers a full-service, on-site repair facility to handle any
of your Traxxas service needs. Maintenance and replacement
parts may be purchased directly from Traxxas by phone or online
at Traxxas.com. You can save time, along with shipping and handling
costs, by purchasing replacement parts from your local dealer.

Do not hesitate to contact us with any of your product support needs.
We want you to be thoroughly satisfied with your new model!

Traxxas
6250 Traxxas Way
McKinney, TX 75070
Phone: [phone]
Toll-free 1-888-TRAXXAS

Internet
Traxxas.com
E-mail: [e-mail]

Entire contents ©2019 Traxxas.
All rights reserved.
Traxxas, Ready-To-Race, Ready­To-Win, Unlimited Desert Racer,
Velineon, and ProGraphix
are trademarks or registered
trademarks of Traxxas. Other
brand names and marks are
the property of their respective
holders and are used only for
purposes of identification. No
part of this manual may be
reproduced or distributed in print
or electronic media without the
express written permission of
Traxxas. Specifications are subject
to change without notice.

*Toll-free support is available to U.S. residents only.

1

DESERT RACER • 3

All instructions and
precautions outlined in this
manual should be strictly
followed to ensure safe
operation of your model.

This model is not intended
for use by children or minors
under 14 years of age.

Previous experience with
radio controlled models is
required! These models are
very large, capable of high
speed and acceleration,
and require the use of LiPo
batteries! These models are
intended for advanced users
that have the experience,
knowledge, and maturity to
safely operate and maintain
the vehicle and the LiPo
battery system for the safety
of themselves and others.

SAFETY PRECAUTIONS

WARNING!

RISK OF FIRE, INJURY, OR DEATH

This product is not a toy. This product is Skill Level 5 and is
not intended for use by children or minors under the age of

14. Individuals under the age of 18 require responsible adult
supervision during operation and maintenance. The Unlimited
Desert Racer (Desert Racer) is capable of extreme performance
and high speeds. Responsibility, maturity, and common sense are
required. This model must be treated with respect and caution to
ensure the safety of yourself and others around you. Operating
the Desert Racer in a careless, unsafe manner, without adequate
care and preparation, can result in collisions with catastrophic
consequences, such as serious injury or death. Know your limits.
Be honest with yourself about your true ability, and be certain you
have a location where you can safely run the model.

The Desert Racer requires the use of LiPo batteries. LiPo batteries
have a severe risk of fire and injury if they are improperly handled,
abused, or misused. User must read and understand all included
instructions, warnings, and precautions regarding the handling,
care, and use of LiPo batteries. A LiPo balance charger (such as the
Traxxas EZ-Peak Live™, part #2971, sold separately) is required
to charge the batteries. Consult Traxxas or your hobby dealer if
you do not know what a LiPo balance charger is. NEVER USE A
NiMH OR NiCAD CHARGER TO CHARGE LIPO BATTERIES AS THIS
CAN CAUSE FIRE RESULTING IN PROPERTY DAMAGE, AND/OR
PERSONAL INJURY OR DEATH.

Terms of Use:

This product is surrendered by Traxxas to the purchaser with the
understanding that the purchaser accepts the responsibility that
driving this model and using the enclosed accessories in a careless,
improper, or unsafe manner can result in serious injury or death. Also,
the purchaser assumes all liability resulting from any misuse, unsafe
handling, failure to follow instructions, or any action that constitutes
a violation of any applicable laws or regulations.

Traxxas, and all Traxxas suppliers and component makers, shall not
be liable for personal injury, loss of property, or loss of life resulting
from the use of this product under any circumstances, including
intentional, reckless, negligent, or accidental behavior. Traxxas,
and all Traxxas suppliers and component makers, shall also not be
liable for any special, indirect, incidental, or consequential damages
arising out of the assembly, installation, or use of their products or
any accessory or chemical required to use their products. By the act
of operating/using the product, the user accepts all resulting liability
and releases Traxxas, and all Traxxas suppliers and component
makers, of any and all liability associated with its use.

If you as the user do not accept liability of ownership, Traxxas requests
that you do not use this product. Do not open any of the enclosed
materials. Return the model to your hobby dealer. Your hobby dealer

absolutely cannot accept an item for return or exchange after it has
been run or is otherwise no longer in as-new condition.

All information contained in this Owner’s Manual is subject to
change without notice. Traxxas reserves the right to make changes
and improvements to products without incurring any obligation to
incorporate such improvements into products previously sold.

If you have any questions about your model or its operation, call
Traxxas Customer Support at 1-888-TRAXXAS (1-888-872-9927);
outside the US, [phone]. E-mail: [e-mail].

Safety Is Your Responsibility!

4 • DESERT RACER

WARNING! CAUTION! DANGER!

FIRE HAZARD!

This vehicle requires LiPo batteries. Charging and
discharging batteries has the potential for fire,
explosion, serious injury, and property damage if not
performed per the instructions. In addition, Lithium
Polymer (LiPo) batteries pose a SEVERE risk of fire if
not properly handled per the instructions and require
special care and handling procedures for long life
and safe operation. LiPo batteries are intended only
for advanced users that are educated on the risks
associated with LiPo battery use. Traxxas does not
recommend that anyone under the age of 14 use or
handle LiPo battery packs without the supervision of a
knowledgeable and responsible adult. Dispose of used
batteries according to the instructions.

• Your model requires the use of LiPo batteries. LiPo
batteries have a minimum safe discharge voltage
threshold that should not be exceeded. The electronic
speed control is equipped with built-in Low-Voltage
Detection that alerts the driver when LiPo batteries have
reached their minimum voltage (discharge) threshold.
It is the driver’s responsibility to stop immediately to
prevent the battery pack from being discharged below
its safe minimum threshold.

• Low-Voltage Detection is just one part of a
comprehensive plan for safe LiPo battery use. It is
critical to follow all instructions for safe and proper
charging, use, and storage of LiPo batteries. Make sure
you understand how to use your LiPo batteries. If you
have questions about LiPo battery usage, please consult
with your local hobby dealer or contact the battery
manufacturer. As a reminder, all batteries should be
recycled at the end of their useful life.

• DO NOT use a charger designed for NiMH or NiCad
batteries. The use of a NiMH or NiCad charger or charge
mode will damage the batteries. Failure to use the correct
charger may result in battery damage, fire, personal injury,
and/or property damage.

• ALWAYS inspect your LiPo batteries carefully before
charging. Do not use or charge battery packs that have
been damaged in any way (bent, dented, swollen, torn
covering, or otherwise damaged).

• BEFORE you charge, ALWAYS confirm that the charger
settings exactly match the type (chemistry), specification,
and configuration of the battery to be charged. DO NOT
exceed the maximum manufacturer recommended
charge rate. DO NOT attempt to charge non-rechargeable
batteries (explosion hazard), batteries that have an
internal charge circuit or a protection circuit, or batteries
that have been altered from original manufacturer
configuration.

• While charging or discharging, ALWAYS place the battery

(all types of batteries) in a fire retardant/fire proof
container and on a non-flammable surface such as
concrete.

• ALWAYS charge batteries in a well-ventilated area.

• Charge the battery in a safe area away from flammable
materials. Monitor the charging process and never
leave batteries unattended while charging. Do not
allow small children to charge or handle LiPo batteries.

• DO NOT disassemble, crush, short circuit, or expose the
batteries to flame or other source of ignition.

• DO NOT let any exposed battery contacts or wires touch
each other. This will cause the battery to short circuit and
create the risk of fire.

SAFETY PRECAUTIONS

• DO NOT leave the charger and battery
unattended while charging, discharging, or
anytime the charger is ON with a battery connected. If
there are any signs of a malfunction, unplug the power
source and/or stop the charging process immediately.

• ALWAYS unplug the charger from the wall outlet and
disconnect the battery when not in use.

• Never charge LiPo battery packs in series or parallel.
Charging packs in series or parallel may result in
improper charger cell recognition and an improper
charging rate that may lead to overcharging, cell
imbalance, cell damage and fire.

• If a battery gets hot to the touch during the charging
process (temperature greater than 110°F / 43°C),
immediately disconnect the battery from the charger and
discontinue charging.

• DO NOT store or charge LiPo batteries with or around
other batteries or battery packs of any type, including
other LiPos.

• Store and transport your LiPo batteries in a cool dry
place. DO NOT store in direct sunlight. DO NOT allow the
storage temperature to exceed 140°F or 60°C such as in
the trunk of a car or the cells may be damaged and risk of
fire created. ALWAYS store battery packs safely out of the
reach of children and pets.

• Keep a Class D fire extinguisher nearby in case of fire.

• DO NOT disassemble LiPo batteries or cells. DO NOT
disassemble the charger.

• DO NOT attempt to build your own LiPo battery pack
from loose cells.

• REMOVE the battery from your model or device before
charging.

• DO NOT expose the charger to water or moisture.

DESERT RACER • 5

SAFETY PRECAUTIONS

6 • DESERT RACER

Important Points to Remember

• Because your model is controlled by radio, it is subject to radio
interference from many sources that are beyond your control. Since
radio interference can cause momentary losses of radio control,
always allow a safety margin in all directions around the model in
order to prevent collisions.

• Range test your radio system in the area that you will be running
the model to ensure that you have range that covers the area you
want to drive. After range testing, drive slowly in the area at first
to make sure there is no interference that can cause momentary
lapses of control.

• Always use new or freshly charged batteries in your model to
maximize signal power output and range.

• The motors, batteries, and speed control can become hot during
use. Be careful to avoid getting burned.

• Choose the right location to drive. Your model is absolutely not
intended for use on public roads or congested areas where its
operation can conflict with or disrupt pedestrian or vehicular traffic.
This is to prevent the possibility of injury or death resulting from
collision with the model by another human being or animal.

• Do not drive the Desert Racer by yourself. Bring a friend along to act
as a spotter to alert you if a person or animal is approaching.

• Do not operate your model at night, or anytime your line of sight to
the model may be obstructed or impaired in any way.

• Do not drive the model close to you where a mistake or loss of
control could cause the model to collide with you or any spectator.

• Always carefully inspect your model for damage or loose
components before running. Do not drive the model if it is
damaged in any way. Tighten any loose hardware. Tighten the
wheel nuts before each running session and periodically check the
tightness of the wheel nuts while you are running.

• Never pick up the model by its tires or wheels. Always keep your
hands safely clear of moving parts whenever the batteries are
plugged in.

• Keep the Desert Racer stored with the batteries removed, out
of the reach of children and protected from access by any other
unauthorized driver.

• Always disconnect the batteries in the model when it is not in use.
Never store the vehicle with batteries in the model, as this can
cause a fire leading to property damage, serious personal injury or
even death.

• Do not continue to operate the model with low batteries or you
could lose control of it. Indications of low battery power include
slow operation and delayed vehicle response. Stop immediately
at the first sign of weak batteries. When the batteries in the
transmitter become weak, the red power light will begin to flash.
Stop immediately and install new batteries.

• Most importantly, use good common sense at all times.

Speed Control

Your model’s electronic speed control (ESC) is an extremely powerful
electronic device capable of delivering high current. Please closely
follow these precautions to prevent damage to the speed control or
other components.

• Disconnect the Battery: Always disconnect the battery or batteries
from the speed control when not in use.

• Insulate the Wires: Always insulate exposed wiring with heat shrink
tubing to prevent short circuits.

• Transmitter on First: Switch on your transmitter first before
switching on the speed control to prevent runaways and erratic
performance.

• Don’t Get Burned: The ESC and motor can become extremely hot
during use, so be careful not to touch them until they cool. Supply
adequate airflow for cooling.

• Use Traxxas High-Current Connectors: Do not change the battery
and motor connectors. Improper wiring can cause fire or damage to
the ESC. Please note that modified speed controls can be subject to
a rewiring fee when returned for service.

• No Reverse Voltage: The ESC is not protected against reverse
polarity voltage.

• No Schottky Diodes: External Schottky diodes are not compatible
with reversing speed controls. Using a Schottky diode with your
speed control will damage the ESC and void the warranty.

• Always adhere to the minimum and maximum limitations of the
speed control as stated in the specifications table in the Owner’s
Manual. Your ESC operates on two batteries. Do not mix battery
types, capacities, or charge levels; use the same voltage, capacity,
and charge level for both batteries. Using mismatched battery packs
could damage the batteries and electronic speed control.

TOOLS, SUPPLIES, AND REQUIRED EQUIPMENT

Your model comes with a set of specialty metric tools. You’ll need to purchase other items, available from your hobby dealer, to operate
and maintain your model.

Supplied Tools and Equipment

2.5mm “T”
wrench

wrench

2.0mm “L”
wrench

Universal wrench

Suspension multi-tool2.5mm “L”

4s battery retainer

For more information on
batteries, see Use the Right
Batteries on page 14.

Recommended Equipment

These items are not required
for the operation of your
model, but are a good idea to
include in any RC toolbox:

• Safety glasses

• Traxxas Ultra Premium Tire
Glue, Part #6468 (CA glue)

• Hobby knife

• Side cutters and/or needle
nose pliers

• Phillips screwdriver

4s accessory adapter

Battery spacers

Required Equipment

Two 2s/3s LiPo battery packs with Traxxas High-Current Connectors
(or single 4s LiPo battery pack using the supplied accessory adapter)

Traxxas Power Cell LiPo batteries recommended
Minimum: 5000mAh 7.4v 2-cell (2S)
Recommended: 6700mAh 14.8v 4-cell (4S)

*Battery and charger style are subject to change and may vary from images.

EZ-Peak Live™

(part #2971,

sold separately)

LiPo battery charger

Traxxas Power Cell Batteries

(part #2914,

sold separately)

4 AA alkaline

batteries

DESERT RACER • 7

ANATOMY OF THE UNLIMITED DESERT RACER

Chassis Top View

Trailing Arm

Rear Swaybar Linkage

Driveshaft

Roll Cage

Nerf bar

Axle Carrier

High-Voltage
Power Amplifer

Upper Suspension

Arm

Shock

Front Differential

Front Bumper

LED Light Pipe

Bumper Extension

Electronic Speed Control

Rear Bumper Lower Suspension

Rear Driveshaft Assembly (spare)

Rear Planetary Drivetrain

Body Interior

Receiver Box

Antenna Mount

Toe Link

Arm

Chassis Bottom View

ANATOMY OF THE UNLIMITED DESERT RACER

Rear Axle Housing

Rear Differential

Driveshaft

Motor

Pinion Gear

Spur Gear

Steering ServoChassis SkidplateRear Upper Link

Transmission

Front Skidplate

Limit Strap

Trailing Arm Shock

Battery Door Latch

Traxxas High-Current Connector

Battery

Compartment Door

Battery Hold-Down

Lower Suspension

Arm

The Quick Start Guide is
not intended to replace the
full operating instructions
available in this manual.
Please read this entire
manual for complete
instructions on the proper
use and maintenance of
your model.

QUICK START: GETTING UP TO SPEED

The following guide is an overview of the procedures for getting your model running. Look for the Quick Start logo on the bottom
corners of Quick Start pages.

1. Read the safety precautions on page 4 6. Check servo operation • See page 18

For your own safety, understand where carelessness and misuse
could lead to personal injury and product damage.

2. Charge two battery packs • See page 14 7. Range test the radio system • See page 18

Your model requires two identical LiPo battery packs and a
compatible battery charger (sold separately). Never use a NiMH or
NiCad charger to charge LiPo battery packs.

3. Install batteries in the transmitter • See page 14 8. Detail your model • See sidebar, page 11

The transmitter requires 4 AA alkaline batteries (sold separately). Apply other decals if desired.

4. Install the battery packs in the model • See page 15 9. Drive your model • See page 23

Your model requires two fully charged battery packs
(sold separately).

5. Turn on the radio system • See page 17 10. Maintaining your model • See page 28

Make a habit of turning the transmitter on first and off last. Follow these critical steps to maintain the performance

Make sure the steering servo is working correctly.

Follow this procedure to make sure your radio system works properly
at a distance, and that there is no interference from outside sources.

Driving tips and adjustments for your model.

of your model and keep it in excellent running condition.

Look for the Quick Start
logo at the bottom of
Quick Start pages.

10 • DESERT RACER

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

INTRODUCTION

Your model includes the latest Traxxas TQi 2.4GHz transmitter with
Traxxas Link™ Model Memory. The transmitter’s easy-to-use design
provides instant driving fun for new RC enthusiasts, and also offers
a full complement of pro-level tuning features for advanced users
– or anyone interested in experimenting with the performance of
their model. The steering and throttle channels feature adjustable
Exponential, End Points, and Sub-Trims. Steering and braking Dual­Rate are also available. Many of the next-level features are controlled
by the Multi-Function knob, which can be programmed to control
a variety of functions. The detailed instructions (page 31) and Menu
Tree (page 34) included in this manual will help you understand and
operate the advanced functions of the new TQi radio system. For
additional information and how-to videos, visit Traxxas.com.

RADIO AND POWER SYSTEM TERMINOLOGY

Please take a moment to familiarize yourself with these radio and
power system terms. They will be used throughout this manual.
A detailed explanation of the advanced terminology and features
of your new radio system begins on page 31.

2.4GHz Spread Spectrum – This model is equipped with the latest
RC technology. Unlike AM and FM systems that require frequency
crystals and are prone to frequency conflicts, the TQi system
automatically selects and locks onto an open frequency and offers
superior resistance to interference and “glitching.”

BEC (Battery Eliminator Circuit) - The BEC can either be in the

receiver or in the ESC. This circuit allows the receiver and servos
to be powered by the main battery pack in an electric model. This
eliminates the need to carry a separate pack of 4 AA batteries to
power the radio equipment.

Brushless Motor - A D/C brushless motor replaces the brushed motor’s

traditional commutator and brush arrangement with intelligent
electronics that energize the electromagnetic windings in sequence
to provide rotation. Opposite of a brushed motor, the brushless
motor has its windings (coils) on the perimeter of the motor can and
the magnets are mounted to the spinning rotor shaft.

Cogging - Cogging is a condition sometimes associated with

brushless motors. Typically, it is a slight stutter noticed when
accelerating from a stop. It happens for a very short period as the

signals from the electronic speed control and the motor synch
with each other. The VXL-6s electronic speed control is optimized
to virtually eliminate cogging.

Current - Current is a measure of power flow through the

electronics, usually measured in amps. If you think of a wire as a
garden hose, current is a measure of how much water is flowing
through the hose.

ESC (Electronic Speed Control) - An electronic speed control is the

electronic motor control inside the model. The VXL-6s electronic
speed control uses advanced circuitry to provide precise, digital
proportional throttle control. Electronic speed controls use
power more efficiently than mechanical speed controls so that
the batteries run longer. An electronic speed control also has
circuitry that prevents loss of steering and throttle control as the
batteries lose their charge.

Frequency band - The radio frequency used by the transmitter to

send signals to your model.

This model operates on the 2.4GHz

direct-sequence spread spectrum.

kV Rating - Brushless motors are often rated by their kV number.

The kV rating equals no-load motor rpm with 1 volt applied. The
kV increases as the number of wire turns in the motor decreases.
As the kV increases, the current draw through the electronics
also increases.

LiPo - Abbreviation for Lithium Polymer. Rechargeable LiPo

battery packs are known for their special chemistry, which
allows extremely high energy density and current handling in a
compact size. These are high performance batteries that require
special care and handling. LiPo battery packs are for advanced
users only.

mAh – Abbreviation for milliamp hour, a measure of the capacity of

the battery pack. The higher the number, the longer the battery
will last between recharges.

Neutral position - The standing position that the servos seek when

the transmitter controls are at the neutral setting.

NiCad - Abbreviation for nickel-cadmium. The original

rechargeable hobby pack, NiCad batteries have very high

current
handling, high capacity, and can last up to 1000 charging cycles.
Good charging procedures are required to reduce the possibility
of developing a “memory” effect and shortened run times.

Applying the Decals

The main decals for your model
have been applied at the
factory. Additional decals are
printed on self-adhesive clear
mylar and are die-cut for easy
removal. Use a hobby knife to
lift the corner of a decal and lift
it from the backing.

To apply the decals, place
one end down, hold the
other end up, and gradually
smooth the decal down with
your finger as you go. This
will prevent air bubbles.
Placing both ends of the
decal down and then trying
to smooth it out will result
in air pockets. Look at the
photos on the box for typical
decal placement.

9

DESERT RACER • 11

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

To prevent loss of radio range
do not kink or cut the black wire,
do not bend or cut the metal tip,
and do not bend or cut the white
wire at the end of the metal tip.

Correct

NoNo No

NiMH - Abbreviation for nickel-metal hydride. Rechargeable NiMH

batteries offer high current handling and much greater resistance
to the “memory” effect. NiMH batteries generally allow higher
capacity than NiCad batteries. They can last up to 500 charge
cycles. A peak charger designed for NiMH batteries is required for
optimal performance.

Receiver - The radio unit inside your model that receives signals

from the transmitter and relays them to the servos.

Resistance - In an electrical sense, resistance is a measure of how

an object resists or obstructs the flow of current through it.
When flow is constricted, energy is converted to heat and is lost.
The Velineon power system is optimized to reduce electrical
resistance and the resulting power-robbing heat.

Rotor - The rotor is the main shaft of the brushless motor. In a

brushless motor, the magnets are mounted to the rotor, and the
electromagnetic windings are built into the motor housing.

Sensored - Sensored refers to a type of brushless motor that

uses an internal sensor in the motor to communicate rotor
position information back to the electronic speed control.

Sensorless - Sensorless refers to a brushless motor that uses

advanced instructions from an electronic speed control to
provide smooth operation. Additional motor sensors and
wiring are not required. The VXL-6s electronic speed control is
optimized for smooth sensorless control.

Servo - Small motor unit in your model that operates the steering

mechanism.

Transmitter - The hand-held radio unit that sends throttle and

steering instructions to your model.

Trim - The fine-tuning adjustment of the neutral position of the

servos, made by adjusting the throttle and steering trim knobs
on the face of the transmitter. Note: The Multi-Function knob
must be programmed to serve as a throttle trim adjustment.

Thermal Shutdown Protection - Temperature sensing electronics

used in the VXL-6s electronic speed control detect overloading
and overheating of the transistor circuitry. If excessive
temperature is detected, the unit automatically shuts down to
prevent damage to the electronics.

2-channel radio system - The TQi radio system, consisting of

the receiver, the transmitter, and the servos. The system uses
two channels: one to operate the throttle and one to operate
the steering.

Voltage - Voltage is a measure of the electrical potential difference

between two points, such as between the positive battery terminal
and ground. Using the analogy of the garden hose, while current is
the quantity of water flow in the hose, voltage corresponds to the
pressure that is forcing the water through the hose.

IMPORTANT RADIO SYSTEM PRECAUTIONS

• Do not kink the receiver’s antenna wire. Kinks in the antenna wire
will reduce range.

• DO NOT CUT any part of the receiver’s antenna wire. Cutting the
antenna will reduce range.

• Extend the antenna wire in the model as far as possible for
maximum range. It is not necessary to extend the antenna wire out
of the body, but wrapping or coiling the antenna wire should be
avoided.

• Do not allow the antenna wire to extend outside the body without
the protection of an antenna tube, or the antenna wire may get
cut or damaged, reducing range. It is recommended to keep the
wire inside the body (in the antenna tube) to prevent the chance
of damage.

12 • DESERT RACER

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

Your model is equipped with the newest TQi 2.4GHz transmitter with Traxxas Link™ Model Memory. The transmitter has two channels

for controlling your throttle and steering. The receiver inside the model has 5 output channels. Your model is equipped with one servo
and an electronic speed control.

TRANSMITTER AND RECEIVER

Set Button

Red/Green Status LED

see page 32 for more info

Menu Button

Throttle Neutral

Adjust

Steering Wheel

MODEL WIRING DIAGRAM

Channel 1

Steering Servo

Traxxas High-Current

Connector (Male)

Antenna

to Battery

2200Kv

Brushless

Motor

Steering
Trim

Multi-Function
Knob

Throttle
Trigger

Sensor Expansion

Link
Button

LED

Port

**

V/T - Voltage/Temp Sensor
RPM - RPM Sensor
BATT/

CH5 - Battery/Channel 5
CH4 - Channel 4*
CH3 - Channel 3*
CH2 - Speed Control
CH1 - Steering Servo
CH1 - Steering Servo*

*Not used

Channel 2

to High-Voltage
Power Amplifer

(see page 23)

VXL-6s Electronic

LED

Speed Control

ESC/Motor Wiring Diagram

Power Switch Battery Compartment

** Accessory sensor expansion port for use with the Telemetry Expander Module
(see Traxxas.com and included materials for more information)

EZ-Set Button
(On/Off Button)

DESERT RACER • 13

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

Use the Right Batteries

Your transmitter uses AA
batteries. Use new alkaline
batteries (part #2914). Do not
use rechargeable AA batteries
to power the TQi transmitter,
as they will not provide
sufficient voltage for optimum
transmitter performance.

Caution: Discontinue running
your model at the first sign of
weak batteries (flashing red
light on the transmitter) to
avoid losing control.

If the status LED doesn’t light
green, check the polarity of
the batteries. If you see any
other flashing signal from the
LED, refer to the chart on page
32 to identify the code.

INSTALLING TRANSMITTER BATTERIES

Your TQi transmitter uses 4 AA batteries. The battery compartment
is located in the base of the transmitter.

1. Remove the battery compartment door by pressing the tab and
sliding the door open.

2. Install the batteries in the correct orientation, as indicated in the
battery compartment.

3. Reinstall the battery compartment door and snap it closed.

4. Turn on the transmitter and check the status LED for a solid
green light.

If the status LED flashes red, the transmitter batteries may be weak,
discharged, or possibly installed incorrectly. Replace with new
batteries. The status LED does not indicate the charge level of the
battery pack installed in the model. Refer to the troubleshooting
section on page 32 for more information on the transmitter status
LED codes.

SELECTING BATTERIES FOR YOUR MODEL

Your model does not include batteries or a charger. Two identical
2s/3s Lithium Polymer (LiPo) batteries equipped with Traxxas High
Current Connectors (or a single 4s LiPo battery using the supplied
accessory adapter) are required. Do not use Nickel Metal Hydride
(NiMH) batteries. Traxxas Power Cell iD batteries are strongly
recommended for maximum performance and safer charging.

The following chart lists available Power Cell iD LiPo batteries for
your model:

LiPo Batteries with iD
2842X 5000mAh 7.4v 2-Cell (2s) 25C LiPo Battery
2872X 5000mAh 11.1v 3-Cell (3s) 25C LiPo Battery
2843X 5800mAh 7.4v 2-Cell (2s) 25C LiPo Battery
2869X 7600mAh 7.4v 2-Cell (2s) 25C LiPo Battery
2888X 5000mAh 14.8v 4-Cell (4s) 25C LiPo Battery
2889X 5000mAh 14.8v 4-Cell (4s) 25C LiPo Battery
2890X 6700mAh 14.8v 4-Cell (4s) 25C LiPo Battery

WARNING: FIRE HAZARD!

Users of Lithium Polymer (LiPo) batteries must read the

Warnings and Precautions beginning on page 4. You
MUST use a LiPo charger for LiPo batteries or battery damage
with the potential for fire will result.

DO NOT use Nickel Metal Hydride
(NiMH) batteries with this model.
The batteries will become
extremely hot and damage or
injury could occur.

SELECTING A CHARGER FOR YOUR MODEL

Make certain you choose the correct type of charger for the
batteries you select. Traxxas recommends you choose a genuine
Traxxas EZ-Peak iD charger for safer charging and maximum battery
life and performance.

Charger Part No.

EZ-Peak Plus,
4 a mp s

EZ-Peak Live,
12 am p s

EZ-Peak Dual,
8 a mps

EZ-Peak Live
D u a l , 2 6 + a m p s

2 97 0 YE S YES YES 3s

2 97 1 YE S YES YES 4s

2 97 2 YE S YES YES 3s

2 97 3 YE S YES YES 4s

NiMH

Compatible

LiPo

Compatible

Battery iDMax.

Cells

14 • DESERT RACER

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

INSTALLATING BATTERY PACKS

Dual Battery Installation

1. Remove the battery compartment door by releasing the latch (A)
and sliding the door open (B).

1

B

A

2. Pull the battery hold-down toward the center of the truck to
release it.

2

3. Flip the hold-down up to access the battery compartment. Rest the
battery hold-down against the chassis in the open position.
Note: The battery hold-down will remain attached to the chassis.

3

4. Insert a fully charged battery pack into the battery compartment.
Place the second battery on top of the first.

4

Battery iD

Traxxas recommended
battery packs are equipped
with Traxxas Battery iD. This
exclusive feature allows
Traxxas battery chargers (sold
separately) to automatically
recognize connected battery
packs and optimize the
charge settings for the
battery. This eliminates
the need to worry over
charger settings and menus
for the easiest and safest
charging solution possible.
Visit Traxxas.com to learn
more about this feature and
available Traxxas iD chargers
and batteries.

Battery Compartment Specs

Standard Configuration
(2s/3s LiPo):

• 160mm (6.3”) long x

46.75mm (1.84”) wide x

56.5mm (2.23”) high

Optional Configuration
(4s LiPo):

• 181.9mm (7.16”) long x

46.75mm (1.84”) wide x

56.5mm (2.23”) high

4

DESERT RACER • 15

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

5. Plug the batteries into the speed control. Note: The battery
connectors from the speed control are fixed inside the chassis.
Align the + and – markings. Make certain the plugs are completely
inserted; the plugs only insert one way.

5

6. Lower the battery hold-down and push it in toward the outside of
the truck to snap it closed.

7. Reinstall the battery compartment door and secure with the latch.
Note: Be sure that the door is installed correctly and secure to the
chassis to protect the batteries and connectors from the elements
while driving.

WARNING: FIRE HAZARD!

Do not operate the model without the battery door
securely in place or the batteries could be damaged.

Single Battery Installation

The supplied 4s accessory adapter must be used for single 4s LiPo
operation.
from the speed control.

• When using a Traxxas 5000mAh 4s battery pack (part #2888X), install

• When using the Traxxas 6700mAh 4s battery pack (part #2890X), use

Plug the 4s accessory adapter into the 2s/3s battery connector

foam battery spacers in the battery compartment for proper fitment.
Install the battery pack as described in the previous section.

the supplied 4s battery retainer to enlarge the battery compartment.
Remove the four 3x12 BCS from the existing 2s/3s battery retainer
and remove the retainer from the battery compartment; then, install
the 4s battery retainer using two of the 3x12 BCS as shown below.
Install the battery pack as described in the previous section.

16 • DESERT RACER

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

RADIO SYSTEM CONTROLS

T

U

R

N

R

I

G

H

T

T

U

R

N

L

E

F

T

Neutral

Brake/Reverse

Forward

RADIO SYSTEM RULES

•

Always turn your TQi transmitter on first and off last. This procedure
will help to prevent your model from receiving stray signals from
another transmitter, or other source, and running out of control. Your
model has electronic fail-safes to prevent this type of malfunction,
but the first, best defense against a runaway model is to always turn
the transmitter on first and off last.

• Always use new batteries for the radio system. Weak batteries will

limit the radio signal between the receiver and the transmitter. Loss

of the radio signal can cause you to lose control of your model.

1

Always turn your

transmitter on first.

2

Turn on the model.

•

In order for the transmitter and receiver to bind to one another, the
receiver in the model must be turned on within 20 seconds of turning
on the transmitter. Either the transmitter or receiver LED flashing
flash red indicates a failure to link. If you miss it, simply turn off the
transmitter and start over.

• Always turn on the transmitter before plugging in the battery.

RADIO SYSTEM BASIC ADJUSTMENTS

Throttle Neutral Adjustment

The throttle neutral adjustment is located
on the transmitter face and controls the
forward/reverse travel of the throttle trigger.
Change the adjustment by pressing the
button and sliding it to the desired position.
There are two settings available:

50/50: Allows equal travel for both acceleration and reverse.
70/30: Allows more throttle travel (70%) and less reverse travel (30%);

this will NOT increase the top speed of the vehicle.

WARNING: RISK OF INJURY!

DO NOT change the throttle neutral setting on the
transmitter while the vehicle and the transmitter are
turned on. This will cause the vehicle to move with no
throttle input and could result in personal injury or
property damage.

Disconnect the batteries in the vehicle and turn off the transmitter,
change the throttle neutral setting, and then turn the transmitter
back on; the ESC will need to be reprogrammed to recognize
the new setting. Turn to VXL-6s Setup Programming on page 20 for

instructions. Do not attempt to power on the ESC until programming
is complete.

Steering Trim

The electronic steering trim located on the
face of the transmitter adjusts the neutral
(center) point of the steering channel.
Note: Traxxas Stability Management (TSM) must be completely
turned off while adjusting steering trim. See page 19 for TSM
adjustments.

Multi-Function Knob

The Multi-Function knob can be
programmed to control a variety of
functions. From the factory, the Multi-
Function knob controls Traxxas Stability Management (TSM). For
more detail on TSM, refer to page 19.

Remember, always turn the
TQi transmitter on first and
off last to avoid damage to
your model.

Automatic Fail-Safe

The TQi transmitter and
receiver are equipped
with an automatic fail­safe system that does not
require user programming.
In the event of signal loss
or interference, the throttle
will return to neutral and
the steering will hold its last
commanded position. If the
Fail-Safe activates while you
are operating your model,
determine the reason for
signal loss and resolve the
problem before operating
your model again.

Stop immediately at the first
sign of weak batteries. Never
turn the transmitter off when
the battery pack is plugged
in. The model could run out
of control.

5

DESERT RACER • 17

Using Reverse: While driving,
push the throttle trigger
forward to apply brakes.
Once stopped, return the
throttle trigger to neutral.
Push the throttle trigger
forward again to engage
proportional reverse.

6,7

18 • DESERT RACER

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

USING THE RADIO SYSTEM

The TQi Radio System has been pre-adjusted at the factory. The
adjustment should be checked before running the model in case of
movement during shipping. Here’s how:

1. Turn the transmitter switch on. The status LED on the transmitter
should be solid green (not flashing).

2.

Elevate the model on a block or a stand so that all the tires are

off the ground. Make sure your hands are clear of the moving
parts of the model.

3.

Plug the battery pack in the model into the speed control.

4.

The on/off switch is integrated into the speed control. With the
transmitter on, press and release the EZ-Set button (.25 seconds).
The LED will shine GREEN. This turns the model on. To turn the
VXL-6s off, press and hold the EZ-Set button until the LED turns
off (.5 seconds).

5.

Turn the steering wheel on the transmitter back and forth and
check for rapid operation of the steering servo. Also, check that
the steering mechanism is not loose or binding. If the steering
operates slowly, check for weak batteries.

6.

When looking down at the model, the front wheels should be
pointing straight ahead. If the wheels are turned slightly to the
left or right, turn off TSM (see page 19) and slowly adjust the
steering trim control on the transmitter until they are pointing
straight ahead; then, return the multi-function knob to the
desired TSM setting.

7.

Gently operate the throttle trigger to ensure that you have
forward and reverse operation, and that the motor stops when
the throttle trigger is at neutral. Warning: Do not apply full

throttle in forward or reverse while the model is elevated.

8. Once adjustments are made, turn off the receiver on your model,
followed by the hand-held transmitter.

Range-Testing the Radio System

Before each running session with your model, you should range-test
your radio system to ensure that it operates properly.

1.

Turn on the radio system and check its operation as described in

the previous section.

2.

Have a friend hold the model. Make sure hands and clothing are

clear of the wheels and other moving parts on the model.

3.

Walk away from the model with the transmitter until you reach

the farthest distance you plan to operate the model.

4.

Operate the controls on the transmitter once again to be sure

that the model responds correctly.

5.

Do not attempt to operate the model if there is any problem

with the radio system or any external interference with your
radio signal at your location.

Higher Speeds Require Greater Distance

The faster you drive your model, the more quickly it will near the
limit of radio range. At 60mph, a model can cover 88 feet every
second! It’s a thrill, but use caution to keep your model in range. If
you want to see your model achieve its maximum speed, it is best
to position yourself in the middle of the truck’s running area, not
the far end, so you drive the truck towards and past your position.
In addition to maximizing the radio’s range, this technique will keep
your model closer to you, making it easier to see and control.

No matter how fast or far you drive your model, always leave
adequate space between you, the model, and others. Never drive
directly toward yourself or others.

TQi Binding Instructions

For proper operation, the transmitter and receiver must be
electronically “bound.” This has been done for you at the factory.
Should you ever need to re-bind the system or bind to an additional
transmitter or receiver, follow these instructions. Note: The receiver
must be connected to a 4.8-6.0v (nominal) power source for binding,
and the transmitter and receiver must be within 5 feet of each other.

1. Press and hold the transmitter’s SET button as you switch the
transmitter on. The transmitter’s LED will flash red slowly.
Release the SET button.

2. Press and hold the receiver’s LINK button as you switch on
the speed control (by pressing the EZ-Set button). Release the
LINK button.

3. When the transmitter and receiver’s LEDs turn solid green, the
system is bound and ready for use. Confirm that the steering and
throttle operate properly before driving your model.

TRAXXAS TQi RADIO & VELINEON POWER SYSTEM

TRAXXAS STABILITY MANAGEMENT (TSM)

Traxxas Stability Management or
TSM allows you to experience all
the speed and acceleration that

was engineered into your Traxxas
model by helping you to maintain control of the vehicle in low­traction situations. TSM helps provide straight ahead full-throttle
acceleration on slippery surfaces, without fishtailing, spinouts, or
loss of control. TSM also dramatically improves braking control.
High speed cornering and control is also made possible as TSM
makes corrections for you, without intruding on your fun, or
creating unexpected side effects.

The Multi-Function knob on
the TQi transmitter has been
programmed to control TSM.
The recommended (default)
setting for TSM is to rotate the
knob to the 12:00 position (the
zero mark on the dial).

Turn the knob clockwise to
increase assistance; turn the
knob counterclockwise to
decrease assistance. Turn the
knob counterclockwise to its
stop to turn TSM completely
off. Note: TSM is deactivated
automatically when driving or
braking in reverse.

When driving on surfaces with
some traction, decrease the TSM setting to allow the vehicle to feel
more “loose” for power sliding, drifting, and so on. On surfaces with
very little traction (loose dirt, smooth concrete, ice/snow), increase
TSM to maximize acceleration and control.

Drive with TSM on and off to test how it is making your control of
the vehicle easier and more precise. For more information, visit
Traxxas.com/tsm.

Note: TSM must be completely turned off while adjusting
steering trim.

Recommended setting

Decrease

assistance

TSM off

Increase

assistance

SETTING UP THE ANTENNA

The receiver antenna has been set up and installed from the
factory. The antenna is secured by a 3x4mm set screw. To remove
the antenna tube, simply remove the set screw with the included

1.5mm wrench.

When reinstalling the antenna, first slide the antenna wire into the
bottom of the antenna tube until the white tip of the antenna is at
the top of the tube under the black cap. Next, insert the antenna
tube into the mount while making sure that antenna wire is in the
slot in the antenna mount; then, install the set screw next to the
antenna tube. Use the supplied 1.5mm wrench to tighten the screw
just until the antenna tube is securely in place. Do not overtighten.

Do not bend or kink the antenna wire (see the sidebar for more
information). Do not shorten the antenna tube.

To prevent loss of radio
range do not kink or cut the
black wire, do not bend or
cut the metal tip, and do not
bend or cut the white wire at
the end of the metal tip.

NoNo

DESERT RACER • 19

ADJUSTING THE ELECTRONIC SPEED CONTROL

VXL-6s Specifications

Input voltage:

4S/6S LiPo
(max. 22.2 volts)

Supported Motors:

Sensorless Brushless

Battery connector:

Traxxas High-Current
Connector

Motor connectors:

TRX 6.5mm bullet
connectors

Motor/battery wiring:

10-gauge Maxx® Cable

Weight:

207g (7.3 oz.)

Case size:

58mm (2.28”)/ 72mm
(2.83”)/ 46mm (1.81”)

20 • DESERT RACER

Electronic Speed Control Adjustments

The VXL-6s electronic speed control’s default settings were programmed
at the factory and should not require adjustment for normal operation.
The following information is helpful to confirm the settings or allow you to
customize the settings for your needs.

ATTENTION: USING LiPo BATTERIES

The VXL-6s electronic speed control is designed to operate on 4S or 6S
LiPo battery power. When you turn your model on, the speed control’s status
LED is green, indicating that Low Voltage Detection is activated to prevent
over-discharging of LiPo batteries. LiPo batteries are intended only for the

most advanced users that are educated on the risks associated with LiPo
battery use.

WARNING: FIRE HAZARD!

Do not use LiPo batteries in this vehicle with Low-Voltage
Detection disabled.

DO NOT use Nickel Metal Hydride
(NiMH) batteries with this model. The
batteries will become extremely hot
and damage or injury could occur.

Verify Low-Voltage Detection setting:

1. Turn on the transmitter (with the throttle at neutral).

2. Connect two fully charged batteries to the VXL-6s.

3. Press and release the EZ-Set button to turn the VXL-6s on. If the LED is solid

green, then Low-Voltage Detection is ACTIVATED. If the LED is solid red, then
Low-Voltage Detection is DISABLED (not safe to use LiPo batteries).

To activate Low-Voltage Detection (LiPo setting):

1. Make sure the LED on the speed control is on and

red.

2. Press and hold the EZ-Set button for ten seconds.

The LED will turn off and then light green. Release
the button.

3. Low-Voltage Detection is now ACTIVATED.

Selecting a Throttle Mode: SPORT, RACE, or TRAINING

1. Connect two fully charged LiPo batteries to the VXL-6s and turn on your

transmitter.

2. Press and hold the EZ-Set button until the LED turns solid green, then

solid red and then begins blinking red. It will blink once, then twice, then
three times, then repeat.

One blink = Sport Mode is the default setting. It allows full forward and

reverse throttle.

Two blinks = Race Mode removes reverse throttle in case your track does

not allow it.

Three blinks = Training Mode will slow the model down by 50% to make

it easier for new drivers to control the model.

3. Release the EZ-Set button after the number of blinks for the mode you
wish to select. Note: If you missed the mode you wanted, keep the EZ-Set

button pressed down and the blink cycle will repeat.

4. The LED will blink and then turn solid green (Low-Voltage Detection
ACTIVE). The model is ready to drive in the mode you have selected.

VXL-6s Setup Programming (calibrating the speed control and transmitter)

The speed control is calibrated at the factory. If the
LED on the speed control is flashing green, then follow

A

these steps to recalibrate it (set the throttle to the
neutral position).

1. Connect two fully charged LiPo batteries to the
VXL-6s.

Green then Red

2. Turn on the transmitter (with the
throttle at neutral).

B

3. Press and hold the EZ-Set button (A).
The LED will first turn green and
then red. Release the EZ-Set button.

4. When the LED blinks RED ONCE, pull

Once Red

the throttle trigger to the full throttle
position and hold it there (B).

C

5. When the LED blinks RED TWICE,
push the throttle trigger to the full
reverse and hold it there (C).

6. When the LED blinks GREEN ONCE,
programming is complete. The LED

Twice Red

will then shine green.

VXL-6s Profile Selection

The speed control is factory set to Profile #1 (100% forward, brakes, and
reverse). To disable reverse (Profile #2) or to allow 50% forward and 50% reverse
(Profile #3), follow the steps below. The speed control should be connected to
the receiver and battery, and the transmitter should be adjusted as described
previously. The profiles are selected by entering the programming mode.

Profile Description

Profile #1 (Sport Mode): 100% Forward, 100% Brakes, 100% Reverse
Profile #2 (Race Mode): 100% Forward, 100% Brakes, No Reverse
Profile #3 (Training Mode): 50% Forward, 100% Brakes, 50% Reverse

ADJUSTING THE ELECTRONIC SPEED CONTROL

A V

A V

Selecting Sport Mode

(Profile #1: 100% Forward, 100% Brakes, 100% Reverse)

1. Connect two fully charged battery

A

B

packs to the VXL-6s and turn on your
transmitter.

2. Press and hold the EZ-Set button until the
LED turns solid green, then solid red and

Green to Red to Off

C

D

then begins blinking red (indicating the
Profile numbers).

3. When the LED blinks red once, release
the EZ-Set button.

Release

4. The LED will blink and then turn solid green. The model is ready to
drive.

Selecting Race Mode
(Profile #2: 100% Forward, 100% Brakes, No Reverse)

1. Connect two fully charged battery

A

B

packs to the VXL-6s and turn on your
transmitter.

2. Press and hold the EZ-Set button until the
LED turns solid green, then solid red and
then begins blinking red (indicating the

Green to Red to Off

C

D

Profile numbers).

3. When the LED blinks red twice, release
the EZ-Set button.

Release

4. The LED will blink and then turn solid green. The model is ready to
drive.

Selecting Training Mode
(Profile #3: 50% Forward, 100% Brakes, 50% Reverse)

1. Connect two fully charged battery

A

B

packs to the VXL-6s and turn on your
transmitter.

2. Press and hold the EZ-Set button until the
LED turns solid green, then solid red and

Green to Red to Off

C

D

then begins blinking red (indicating the
Profile numbers).

3. When the LED blinks red three times,
release the EZ-Set button.

Release

4. The LED will blink and then turn solid green. The model is ready to
drive.

Note: If you missed the mode you wanted, keep the EZ-Set button
pressed down and the blink cycle will repeat until the button is
released and a mode is selected.

One blink Red

Solid

Two blinks Red

Solid

Three blinks Red

Solid

Accessory Power Panel

The VXL-6s electronic speed control is equipped with a power panel
that can be used to power optional accessories, such as LED light kits
or additional cooling fans (see Traxxas.com for additional information).
Always be sure to keep the panel cover installed when
accessories are not being used to protect the pins
from damage.

LED Codes and Protection Modes

The VXL-6s electronic speed control is equipped
with sophisticated circuitry designed to help protect
the electronics from damage caused by overloading and excessive
temperatures. When a protection circuit is activated, an LED on the VXL­6s ESC will light, indicating a fault.

Explanation Solution

Overcurrent
Protection,
Stage 1

Overcurrent
Protection,
Stage 2

Low Voltage
Protection,
Stage 1

Low Voltage
Protection,
Stage 2

Overvoltage

Thermal
Shutdown
Protection,
Stage 1

Thermal
Shutdown
Protection,
Stage 2

Critical
functioning
error

Programming
error

Stop driving; inspect the vehicle for
overgearing or damage.

Stop driving; inspect the vehicle for
overgearing or damage.

Stop driving; inspect the batteries
and recharge.

Stop driving; inspect the batteries
and recharge.

Stop driving and disconnect the
batteries. Inspect the batteries and
confirm the battery voltage.

Stop driving; inspect the cooling fan
on the ESC. Allow the power system
to cool before continuing.

Stop driving; inspect the cooling fan
on the ESC. Allow the power system
to cool before continuing.

Contact Traxxas Customer Service.

Contact Traxxas Customer Service.

Patented Training Mode
(Profile #3) reduces forward
and reverse throttle by 50%.
Training Mode is provided
to reduce the power output,
allowing beginning drivers
to better control the model.
As driving skills improve,
simply change to Sport or
Race Mode for full-power
operation.

The VXL-6s has built-in
programming that prevents
accidental activation of
reverse while in forward
motion and vice-versa. You
must come to a complete
stop, release the throttle
trigger, then apply opposite
throttle to engage the motor
in the desired direction.

DESERT RACER • 21

ADJUSTING THE ELECTRONIC SPEED CONTROL

• Solid Green: VXL-6s power-on light. Low-Voltage
Detection is ACTIVATED (LiPo setting).

• Solid Red: VXL-6s power-on light. Low-Voltage
Detection is DISABLED (NIMH setting).

• Current LED (A) Solid Red: The VXL-6s has entered
Overcurrent Protection, Stage 1. When excessive current

flow (amperage) is being routed through the power
system caused by failure to use the appropriate gearing
ratio for the drivetrain and the driving surface, the VXL-6s
will limit the power output to 50% throttle. Make sure
your model is properly geared for the driving conditions.
Before continuing, inspect the vehicle for damage. To
reset, disconnect and then reconnect the batteries.

• Current LED (A) Fast Blinking Red: The VXL-6s has
entered Overcurrent Protection, Stage 2. When the
current flow (amperage) spikes temporarily due to a
bound or restricted driveline (model is stuck against an
object or encountered a restrictive driving surface), the
VXL-6s will automatically shut down (fail-safe mode).
Stop driving the vehicle. The VXL-6s will stay in this
mode until the current flow is recovered (obstruction
is removed, model is moved to a smoother driving
surface) and the throttle is returned to neutral. To reset,
disconnect and then reconnect the batteries.

• Voltage LED (V) Solid Red: The VXL-6s has entered Low
Voltage Protection, Stage 1. When the battery voltage

begins to reach the minimum recommended discharge
voltage threshold for LiPo battery packs, the VXL-6s will
limit the power output to 50% throttle. Stop driving
the model. The VXL-6s will stay in this mode until the
battery voltage is recovered or fully charged batteries
are connected.

• Voltage LED (V) Slow Blinking Red: The VXL-6s has
entered Low Voltage Protection, Stage 2. When the
battery voltage attempts to fall below the minimum
threshold, the VXL-6s will automatically shut down
(fail-safe mode). The LED on the speed control will slowly
blink red, indicating a low-voltage shutdown. Stop
driving the model. The VXL-6s will stay in this mode until
fully charged batteries are connected.

• Voltage LED (V) Fast Blinking Red: If the motor has no
power, the VXL-6s has entered Overvoltage Protection.
If the battery voltage from the connected battery packs
is too high, the VXL-6s will go into a fail-safe mode.
WARNING: If input voltage exceeds approximately 33.6
volts (16.8 maximum peak input voltage per battery
pack), the ESC may be damaged. Do not exceed 33.6
maximum total peak voltage. Stop driving the model and
disconnect the batteries.

• Temperature LED ( ) Solid Red: The VXL-6s has entered
Thermal Shutdown Protection, Stage 1 to guard against

overheating caused by excessive current flow. The VXL-6s
will limit the power output to 50% throttle. Stop driving
the model. Inspect the cooling fan on the ESC to make
sure it is operating. Allow the power system to cool
before continuing.

• Temperature LED ( ) Fast Blinking Red: The VXL-6s has
entered Thermal Shutdown, Protection Stage 2 and has
automatically shut down (fail-safe mode). Stop driving the
model. Inspect the cooling fan on the ESC to make sure
it is operating. Allow the power system to cool before
continuing. If you are experiencing frequent warnings
about temperature, it could be caused by overgearing
(from stock), overly aggressive and continuous high
speed driving, vehicle damage, or driving in conditions
such as deep sand, heavy mud, and tall grass.

• Current/Voltage/Temperature LEDs Solid Red or
all LEDs Fast Blinking Red: The VXL-6s has entered

this protection mode due to possibly having Thermal
Shutdown Protection and Low Voltage Protection
(see above) occur at the same time or there is a critical
functioning or programming error. Disconnect the
batteries and contact Traxxas Customer Service for
assistance.

22 • DESERT RACER

HIGH-VOLTAGE POWER AMPLIFIER AND LED LIGHTS

Your Unlimited Desert Racer comes equipped with a curved roof
light bar, dual straight LED bumper-mounted light bars, and a
multifunction brake light/class light bar. A high-voltage 8-channel
power amplifier is also included to provide regulated output and
stable lighting performance. The amplifier and the LED lights will
turn on when the ESC is turned on.

Controlling the LED Lights

Default Setting: Low Beam Mode

Connector Channel Default Connection Default Setting

A 1 Front Grille Low Beam Headlights On

2 Front Grille High Beam Headlights O

B 3 Low Beam Windshield Lights On

4 High Beam Windshield Lights O

C 5 Tail Lights O*

6 Brake Lights On when braking

D 7 Class Lights On

8 Not used N/A

High-Voltage Power Amplifier Mode Selection

Use the Mode Select button on the high-voltage power amplifier to
toggle through the different lighting modes (from Low Beam Mode
to High Beam Mode to Daytime Mode).

Connector Channel Low Beam Mode High Beam Mode Daytime Mode

A 1 On O O

2 O On O

B 3 On O O

4 O On O

C 5 On On O

6 On when braking On when braking On when braking

D 7 On On On

8 N/A N/A N/A

Change the high-voltage power
amplifier settings and gain access
to additional functions using the
Traxxas Link App (available in the
Apple App Store

SM

or on Google
Play™). The TQi transmitter with
the Traxxas Link Wireless Module
(part #6511, sold separately) are required.

This device complies with FCC Part 15 & IC RSS-210 rules subject to the following conditions:
(1) This device may not cause harmful interference, and (2) This device must accept all interference
received, including interference that may cause undesired operation.
App Store is a service mark of Apple Inc. Google Play is a trademark of Google Inc.

*To race the truck with tail lights, connect the in-line connector on
the rear LED light bar harness.

DESERT RACER • 23

DRIVING YOUR MODEL

9

24 • DESERT RACER

Now it’s time to have some fun! This section contains instructions on
driving and making adjustments to your model. Before you go on,
here are some important precautions to keep in mind.

Where to drive

The Unlimited Desert Racer is a large vehicle capable of high speed
and requires a large area to run. Choose a location where the Desert
Racer will not have an opportunity to collide with onlookers or
interfere with pedestrian or vehicular traffic.

Like its full-size counterpart, your Desert Racer uses both steering and
throttle input to help maintain control of the vehicle during off-road
driving. TSM will keep the front end planted while you rotate the rear
of the truck with precise throttle control. The locked solid rear axle will
allow smooth power slides on loose surfaces for sharper turns and an
authentic driving experience. For best on-road performance, slow the
truck when turning and apply throttle gently until you become familiar
with driving your model and the surface conditions.

Mixed driving across different surface types is recommended. If
you are running frequently in tall grass, deep sand, or other high
load conditions, you may overheat the motor or the speed control.
This will result in reduced power output until the system cools. We
recommend allowing time for the power system to cool between
battery packs.

• Allow the model to cool for a few minutes between runs. This is
particularly important when using high-capacity battery packs that
allow extended periods of running. Monitoring temperatures will
extend the lives of the batteries and motors.

• Do not continue to operate the model with low batteries or you
could lose control of it. Indications of low battery power include slow
operation, delayed vehicle response, or ESC shutdown due to the
Low-Voltage Detection circuitry. Stop immediately at the first sign of
weak batteries. When the batteries in the transmitter become weak,
the power light will begin to flash red. Stop immediately and install
new batteries.

• Do not drive the model at night, on public streets, or in large crowds
of people.

• If the model becomes stuck against an object, do not continue to run
the motor. Remove the obstruction before continuing. Do not push
or pull objects with the model.

• Because the model is controlled by radio, it is subject to radio
interference from many sources beyond your control. Since radio
interference can cause momentary losses of control, allow a safety
margin of space in all directions around the model in order to
prevent collisions.

• Use good, common sense whenever you are driving your model.
Intentionally driving in an abusive and rough manner will only result
in poor performance and broken parts. Take care of your model so
that you can enjoy it for a long time to come.

• High-performance vehicles produce small vibrations that may
loosen hardware over time. Frequently check wheel nuts and other
screws on your vehicle to ensure that all hardware remains properly
tightened.

About Run Time

A large factor affecting run time is the type and condition of
your batteries. The milliamp hour (mAh) rating of the batteries
determines how large their “fuel tank” is. A 3000mAh battery pack will
theoretically run twice as long as a 1500mAh sport pack. Because of
the wide variation in the types of batteries that are available and the
methods with which they can be charged, it’s impossible to give exact
run times for the model.

Another major factor that affects run time is how the model is driven.
Run times may decrease when the model is driven repetitively from a
stop to top speed and with repetitive hard acceleration.

Tips for Increasing Run Time

• Use batteries with the highest mAh rating you can purchase.

• Use a high-quality peak-detecting charger.

• Read and follow all maintenance and care instructions provided by

the manufacturer of your batteries and charger.

• Keep the VXL-6s cool. Get plenty of airflow across the ESC heat sinks.

• Lower your gear ratio. Installing a smaller pinion or larger spur gear

will lower your gear ratio, causing less power draw from the motor
and battery, and reducing overall operating temperatures.

• Maintain your model. Do not allow dirt or damaged parts to cause

binding in the drivetrain. Keep the motor clean.

mAh Ratings and Power Output

The mAh rating of the battery can affect your top-speed performance.
The higher capacity battery packs experience less voltage drop under
heavy load than low mAh rated packs. The higher voltage potential
allows increased speed until the battery begins to become discharged.

DRIVING YOUR MODEL

RUNNING IN WET CONDITIONS

Your new Traxxas model is designed with water-resistant features
to protect the electronics in the model (receiver, servos, electronic
speed control). This gives you the freedom to have fun driving
your model through puddles, wet grass, snow, and through
other wet conditions. Though highly water resistant, the model
should not be treated as though it is submersible or totally 100%
waterproof. Water resistance applies only to the installed electronic
components. Running in wet conditions requires additional care
and maintenance for the mechanical and electrical components to
prevent corrosion of metal parts and maintain their proper function.

Precautions

• Without proper care, some parts of your model can be seriously
damaged due to contact with water. Know that additional
maintenance procedures will be required after running in wet
conditions in order to maintain the performance of your model.
Do not run your model in wet conditions if you are not willing to
accept the additional care and maintenance responsibilities.

• Not all batteries can be used in wet environments. Consult your
battery manufacturer to see if their batteries can be used in wet
conditions.

• The Traxxas TQi transmitter is not water resistant. Do not subject it
to wet conditions such as rain.

• Do not operate your model during a rain storm or other inclement
weather where lightning may be present.

• Do not allow your model to come in contact with salt water (ocean
water), brackish water (between fresh water and ocean water),
or other contaminated water. Salt water is highly conductive and
highly corrosive. Use caution if you plan to run your model on or
near a beach.

Before Running Your Vehicle in Wet Conditions

1. Consult the section “After Running Your Vehicle in Wet

Conditions” before proceeding. Make sure you understand the
additional maintenance required with wet running.

2. The wheels have small holes molded in to allow air to enter and

exit the tire during normal running. Water will enter these holes
and get trapped inside the tires if holes are not cut in the tires. Cut
two small holes (3mm or 1/8” diameter) in each tire. Each hole
should be near the tire center-line, 180 degrees apart.

3. Confirm that the receiver box O-ring and cover are installed
correctly and secure. Make sure the screws are tight and the blue
O-ring is not visibly protruding from the edge of the cover.

4. Confirm that your batteries can be used in wet conditions.

5. Use lower gearing (smaller pinion gears, as low as 23T or spur
gear as large as 55T) when running in mud, deep puddles, snow,
or other similar situations that will restrict the tires and put much
higher loads on the motor.

Motor Precautions

• Velineon motor life can be greatly reduced in mud and water. If the

motor gets excessively wet or submerged, use very light throttle
(run the motor slowly) until the excess water can run out. Applying
full throttle to a motor full of water can cause rapid motor failure.
Your driving habits will determine motor life with a wet motor. Do
not submerge the motor under water.

• Do not gear the motor by temperature when running in wet

conditions. The motor will be cooled by water contact and will not
give an accurate indication of appropriate gearing.

• Use special care when operating your model in muddy conditions.

Stop operating your model if it appears to be straining due to the
tackiness of the mud or build-up of mud on the chassis. Do not
allow mud to collect on the motor or pack around the motor.

After Running Your Vehicle in Wet Conditions

1. Drain the tires by spinning the tires at high speed to “sling” the
water out. One way to do this is to make several high-speed
passes on a flat, dry surface (if possible).

2. Remove the batteries.

3. Rinse excess dirt and mud off the truck with low-pressure water,
such as from a garden hose. Do not use a pressure washer
or other high-pressure water. Avoid directing water into the
bearings, differentials, etc.

4. Blow off the truck with compressed air (optional, but
recommended). Wear safety glasses when using compressed air.

5. Remove the wheels from the truck.

6. Spray all the bearings, drivetrain, and fasteners with WD-40® or
similar water-displacing light oil.

7. Let the truck stand or you may blow it off with compressed air.
Placing the truck in a warm, sunny spot will aid drying. Trapped
water and oil will continue to drip from the truck for a few hours.
Place it on a towel or piece of cardboard to protect the surface
underneath.

DESERT RACER • 25

DRIVING YOUR MODEL

26 • DESERT RACER

8. As a precautionary step, remove the sealed receiver box
cover. While unlikely, humidity or tiny amounts of moisture or
condensation may enter the receiver box during wet running.
This can cause long-term problems with the sensitive electronics
in the receiver. Removing the receiver box cover during storage
allows the air inside to dry. This step can improve the long-term
reliability of the receiver. It is not necessary to remove the receiver
or unplug any of the wires.

9. Additional Maintenance: Increase your frequency of disassembly,
inspection, and lubrication of the following items. This is necessary
after extended wet use or if the vehicle will not be used for an
extended period of time (such as a week or longer). This additional
maintenance is needed to prevent any trapped moisture from
corroding internal steel components. Refer to your exploded view
diagrams for help with disassembly and reassembly.

• Stub axle housing bearings: Remove, clean, and re-oil the
bearings.

• Differentials: Remove, disassemble, clean, and re-grease the
differential components. Use a light coating of Traxxas high­performance grease (part #5041) on the metal gear teeth.

• Rear Drivetrain and Transmission Gears: Remove, disassemble,
clean, and re-grease the drivetrain components. Use a light
coating of Traxxas high-performance grease (part #5041) on the
metal gear teeth. Remove, clean, and re-oil the bearings.

• Rear Center Driveshaft: Apply small amounts of high­performance grease (part #5041) at the pin location on each
end of the driveshaft. Make sure the driveshaft rotates freely
without binding.

• Transmission Output Shaft: Apply small amounts of high­performance grease (part #5041) to the rear transmission
output shaft for a smooth fit to the bearings. Remove, clean,
and re-oil the bearings.

RECEIVER BOX:
MAINTAINING A WATERTIGHT SEAL

Removing and Installing Radio Gear

The unique design of the receiver box allows the removal and
installation of the receiver without losing the ability to maintain
a watertight seal in the box. The patented wire clamp feature
gives you the ability to also install aftermarket radio systems and
maintain the watertight features of the receiver box.

Removing the Receiver

1. To remove the cover, remove the two 3x8mm button-head cap
screws.

2. To remove the receiver from the box, simply lift it out and set
to the side. The antenna wire is still inside the clamp area and
cannot be removed yet.

3. Remove the wire clamp by removing the two 2.5x8mm cap head
screws.

4. Unplug the servo cables from the receiver and remove the
receiver.

Receiver Installation

1. Always install the wires into the
receiver box before installing the
receiver.

2. Install the antenna wire and the
servo cables into the receiver box.

3. Arrange the wires neatly using the
wire guides in the receiver box. The excess
wire will be bundled inside the receiver
box. Label which wire is for which channel.

4. Apply a small bead of silicone grease
(Traxxas part #1647) to the wire
clamp.

5. Install the wire clamp and tighten
the two 2.5x8mm cap head screws
securely.

6. Using double-sided adhesive foam
tape, install the receiver into the box.

Note: For best performance, it is recommended that the receiver
be installed in the original orientation as shown.

7. Plug the wires into the receiver. Refer to page 13 for the wiring
diagram.

8. Make sure the box light pipe is aligned with the receiver LED.
Make sure the O-ring is properly seated into the groove in the
receiver box so that the cover will not pinch it or damage it in
any way.

9. Install the cover and tighten the two 3x8mm button-head cap
screws securely.

10. Inspect the cover to make sure that the O-ring seal is not visible.

BASIC TUNING ADJUSTMENTS

Once you become familiar with driving your model, you might need
to make adjustments for better driving performance.

Adjusting Gear Mesh

Incorrect gear mesh is the most common cause of stripped spur
gears. Your Desert Racer makes improper gear mesh virtually
impossible. A pin system helps set the motor in the proper place
according to the pinion and spur gear that are selected.

To access the pin system,
remove the eight 3x15mm
coutersunk cap screws
from the bottom skidplate.
Remove the skidplate from
the chassis. Next, remove the
two 3x8mm button-head
cap screws that secure the
gear cover and remove the
gear cover. Remove the
three motor mount screws
(4x10mm button-head
cap screws (2), 4x25mm
button-head cap screw (1))
and lift off the motor. This
will expose the pin. Be sure
not to lose the pin that goes
between the motor and the
chassis.

Select the desired gearing
from the pin location chart.
Replace the spur and pinion
gears as needed. When
installing the motor, install
the pin into its proper
location based on the
gearing that is chosen. The
pin on the bottom helps
to lock the motor into the
proper place for correct
gear mesh. Secure the
motor in place with three
screws inserted into the
transmission housing.

4x25mm BCS

3x15mm

CCS

3x8mm BCS

4x10mm BCS

Pinion/Spur Pin Location

Spur Gear

27-T

Part #5647

31-T

Part #5638

Pinion Gear

34-T

Part #5639

47-T

Part #8573

- F C

A C E

G E -

51-T

Part #8574

55-T

Part #8575

Note: Should you choose to do so, you can also set the gear mesh

manually without the pin. With the pin removed, use the 4x10mm
button-head cap screws (2) and 4x25mm button-head cap screw (1)
on the bottom to set gear mesh. Loosen the screws. Cut a narrow
strip of notebook paper and run it into the gear mesh. Slide the
motor and pinion gear into the spur gear. Tighten the screws, and
then remove the strip of paper. You should be able to run a fresh
strip of paper through the gears without binding them.

DESERT RACER • 27

BASIC TUNING ADJUSTMENTS

Important: The shocks are
assembled at the factory with
the correct center-to-center
distance (between the rod end
balls). Any time the shocks are
removed and disassembled, this
distance should be checked to
ensure proper operation of the
suspension.

See your parts list for correct
center-to-center measurements
(for front and rear shocks with
and without springs).

28 • DESERT RACER

Centering Your Servo

If you have removed the servo horn from your Desert Racer’s steering
servo, or the servo has been removed for service or cleaning, the
servo must be re-centered prior to installation of the servo horn or
installation of the servo.

1. Remove the servo horn from the steering servo.

2. Connect the steering servo to channel 1 on the receiver. Connect
the electronic speed control (ESC) to channel 2. The white wire on
the servo lead is positioned toward the receiver’s LED.

3. Turn the transmitter power switch on. Make certain the
transmitter’s batteries are not depleted.

4. Turn off TSM (see page 19).

5. Turn the transmitter’s steering trim knob to the center “0” position.

6. Disconnect both the blue and white motor connectors (see page

13) to prevent the motor from turning during the next steps.
Connect a fresh battery pack to the speed control and turn on the
ESC (see page 20). The servo’s output shaft will automatically jump
to its center position.

7. Install the servo horn onto
the servo output shaft. With
the servo laying down flat,
the servo horn should be
installed vertically so that it is
in the centered position.

8. Check servo operation by
turning the steering wheel
back and forth to ensure that the mechanism has been centered
properly and you have equal throw in both directions. Use the
transmitter’s steering trim knob to fine-tune the position of the
servo horn so the model tracks straight when the steering wheel is
at neutral.

Fine Tuning the Shocks

The eight (8) oil-filled aluminum shocks (dampers) effectively control
the suspension movement by preventing the wheels and tires from
continuing to “bounce” after rebounding from a bump. Changing the
oil in the shocks can vary the suspension damping effect. Changing
the oil to a higher viscosity oil will increase damping. Lowering the
viscosity of the oil will cause the suspension damping to be reduced.
Damping should be increased (with higher viscosity oil) if the model

is bottoming easily over jumps. Damping should be decreased (with
thinner viscosity oil) if the model is hopping over small bumps and feels
unstable. The viscosity of shock oil is affected by extremes in operating
temperature; an oil of certain viscosity will become less viscous at higher
temperatures and more viscous at lower temperatures. Operating in
regions with cold temperatures may require lower viscosity oil. Only
use 100% silicone oil in the shock. From the factory, the shocks are filled
with 30W silicone oil in the front and 60W silicone oil in the rear.

For shock piston tuning, see Advanced Tuning Adjustments on page 29.

Replacing Shock Oil

The shocks have to be removed from the vehicle and disassembled to
change the oil.

1. Remove the lower spring
retainer and shock spring.

2. Remove the upper shock cap
using the shock wrench and
the suspension multi tool.

3. Empty the used shock oil
from the shock body.

4. Fill the shock with new silicone shock oil up to the top of the
shock body.

5. Slowly move the piston up and down (always keeping it submerged
in oil) to release the air bubbles. Let the shock sit for a few minutes
to allow any remaining air bubbles to surface.

Slowly thread the upper cap with the installed shock bladder onto

6.
the shock body with the suspension multi tool. The excess oil will
bleed out of the small hole in the shock cap.

7. Tighten the shock cap until snug. Use the included steel shock
wrench to hold onto shock body while tightening.

MAINTAINING YOUR MODEL

Your model requires timely maintenance in order to stay in top
running condition. The following procedures should be taken

very seriously.

Frequently inspect the vehicle for obvious damage or wear.
Look for:

1. Cracked, bent, or damaged parts

2. Check the wheels and steering for binding.

3. Check the operation of the shock absorbers.

4. Check the wiring for any frayed wires or loose connections.

5. Check the mounting of the receiver and servo(s) and
speed control.

6. Check the tightness of the wheel nuts with a wrench.

7.

Check the operation of the radio system, especially the condition of
the batteries.

8. Check for any loose screws in the chassis structure
or suspension.

9.

Check the operation of the steering servo and ensure that it is
not binding.

10.

Inspect the gears for wear, broken teeth, or debris lodged between
the teeth.

Other periodic maintenance:

• Chassis: Be sure to keep the motor and ESC free of grass, dirt and

grime to be sure to keep the components cool for optimal run
times and temperatures.

• Suspension: Periodically inspect the model for signs of damage,

such as bent or dirty suspension pins, damaged toe links, loose
screws, and any signs of stress or bending. Replace components as
needed.

•

Steering: Over time, you may notice increased looseness in the
steering system. The toe links may wear out from use (part #8547).
Replace these components as needed to restore factory tolerances.

•

Shocks: Keep the oil level in the shocks full. Use only 100%
pure silicone shock oil to prolong the life of the seals. If you are
experiencing leakage around the top of the shock, inspect the
bladder in the top cap for signs of damage or distortion from
overtightening. If the bottom of the shock is leaking, then it is time
for a rebuild. The Traxxas rebuild kits for two shocks is part #8455
and #7468X.

• Driveline: Inspect driveshafts to make sure the drive pins are not
cracked or extremely worn. Additional driveline noise can occur if
the driveline components are worn out. Remove the gear cover.
Inspect the spur gear for wear and check the tightness of the set
screws in the pinion gears. Tighten, clean, or replace components
as needed.

• Torque-biasing Center Drive Unit: The Unlimited Desert Racer is
equipped with a torque-biasing center drive unit. The drive unit
can be rebuilt, but it requires a detailed maintenance procedure
and the use of 1M weight differential oil (part #5042). For additional
information and how-to videos, please visit Traxxas.com.

• Rear Drivetrain and Transmission Gears: Periodically inspect
the gears and bearings for damage or excessive wear. Remove,
disassemble, clean, and re-grease the components. Remove, clean,
and re-oil the bearings. Replace components as needed.

• Rear Center Driveshaft: Frequently inspect the rear center
driveshaft for wear. Apply small amounts of high-performance
grease (part #5041) at the pin location on each end of the
driveshaft. Make sure no parts are excessively worn or
deteriorated. Replace the driveshaft assembly if damaged.

• Transmission Output Shaft: The rear transmission output shaft is
greased for a smooth fit to the bearings. Also, there is an x-ring seal
installed to keep the grease from coming out of the transmission.
Periodically check to be sure the x-ring is in place. Add grease to
the shaft when necessary.

Storage

When you are through running the model for the day, blow it off
with compressed air or use a soft bristled paint brush to dust off the
vehicle. Always disconnect and remove the battery from the model
whenever the model is stored. If the model will be stored for a long
time, also remove the batteries from the transmitter.

10

DESERT RACER • 29

ADVANCED TUNING ADJUSTMENTS

Gearing Compatibility Chart:

The chart below shows recommended
gear combination ranges for your model.

Spur Gear

47 51 55

23

- - 2.39

24 - - 2.29

25 - - 2.20

26 - - 2.12

27 - 1.89 2.04

28 - 1.82 1.96

29 - 1.76 1.90

30 - 1.70 1.83

31 1.52 1.65 1.77

32 1.47 1.59 1.72

Pinion Gear

33 1.42 1.55 -

34 1.38 1.50 -

35 1.34 1.46 -

36 1.31 1.42 -

37 1.27 - -

38 1.24 - -

39 1.21 - -

1.18 - -

40

Out of Box Setup; recommended for most
running, 4S/6S LiPo.
2S 5000mAh + recommended
3S 5000mAh + recommended
4S 5000mAh + recommended

Usable gearing range for 4S LiPo only.
Increases torque and run time.
4S 5000mAh + recommended

Usable gearing range for 4S/6S LiPo.
Increases torque and run time.
2S 5000mAh + recommended
3S 5000mAh + recommended
4S 5000mAh + recommended

4S LiPo, 40mph running only.

Fits; not recommended.

Does not fit.

30 • DESERT RACER

Roll Center

The Unlimited Desert Racer has provisions for adjusting the roll center
geometry of the rear suspension. Roll center refers to the virtual axis
around which the chassis will roll when subjected to cornering forces.
The rear upper suspension link is set in the upper position, which is
the recommended position for running. Moving the link to either of
the two alternate mounting holes will increase the roll center and
reduce anti-squat.

Gearing

One of the more significant advantages to your model’s transmission
is the wide range of available gear ratios. Changing the gearing
allows you to fine tune the speed of the model and control the
temperatures of the battery pack and motor. Use a lower gear ratio
(numerically larger) to reduce current draw and temperatures. Use
a higher gear (numerically lower) to increase top speed. Use the
following formula to calculate the overall ratio for combinations not
listed on the gear chart:

# Spur Gear Teeth

x 9.47 = Final Gear Ratio

# Pinion Gear Teeth

When using higher gear ratios, it is important to monitor the
temperatures of the battery, motor, and speed control. If the battery
is extremely hot (150°F) and/or the motor is too hot to touch (180°F),
your model is probably over-geared and drawing too much current.
This temperature test assumes that the model is close to factory stock
weight and operates freely with no excessive friction, dragging, or
binding, and the battery is fully charged and in good condition.
Note: If not using the pin system, check and adjust gear mesh if a
spur and/or pinion gear is changed.

This model is equipped with a 2200Kv brushless motor. The gear
combination that comes stock on each model provides good overall
acceleration and top speed.

SHOCK TUNING

Shock Pistons

The shock pistons can be replaced with the available optional pistons to
vary the amount of damping. Optional pistons with bypass holes that are
larger or smaller than the factory installed stock pistons can be used to
decrease or increase damping respectively. Change the pistons if you only
have one weight of shock oil available to you.

From the factory, the Desert Racer is

Multi-tool Shock Functions

equipped with pistons with 1.7mm
bypass holes (recommended).

Shock disassembly

The shocks must be removed from the
vehicle and disassembled to change
the pistons. Use the shock exploded
views included with the model to aid
in the assembly process.

1. Remove the 2.5x10mm cap screw

A. Tighten/Loosen Upper Cap

from the lower spring retainer.
Remove the lower spring retainer
and spring from the shock.

2. Remove the shock cap (A) and
empty the shock body of shock oil.

3. Remove the lower cap (B) and
the X-ring from the shock body.

4. Use side cutters to grip the shock

B. Tighten/Loosen Lower Cap

shaft just above the rod end (C).
Remove the rod end from the
shock shaft using the suspension
multi-tool (C).

5. Remove the shock shaft with piston
from the shock body out through
the top of the shock body.

Shock assembly

1. Replace the stock piston with

C. Remove/Install Rod End

desired optional piston. Be careful
not to lose the small washer
located below the piston.

2. Position the new piston onto
the shock shaft above the small
washer. Grip the threads of
the shaft with side cutters or
needlenose pliers and tighten

D. Piston Installation/Removal

the nut with the 4-way wrench to
secure the assembly (D).

3.

Insert the shock shaft assembly through the shock body until the piston

bottoms out.

4. Lubricate the shaft and X-ring with silicone oil.

ADVANCED TUNING ADJUSTMENTS

5. Install the X-ring over the shaft and into the bore of the shock body.

6. Install the lower cap using the suspension multi-tool (B).

7. Grip the shaft close to the threads with needle nose pliers or side
cutters and thread the rod end onto the shock shaft until the rod
end bottoms out (C).

8. Fill the shock with new silicone shock oil up to the top of the
shock body. Slowly move the piston up and down (always keeping
it submerged in oil) to release the air bubbles. Let the shock sit for a
few minutes to allow any remaining air bubbles to surface.

9. Slowly thread the upper cap with the installed shock bladder onto
the shock body with the suspension multi tool (A). The excess oil
will bleed out of the small hole in the shock cap. Tighten the shock
cap until snug. Use the included steel shock wrench to hold onto
shock body while tightening.

10. Reinstall the spring and lower spring retainer. Reinstall the

2.5x10mm cap screw.

Tuning the Front Sealed Gear Differential

The Ultimate Desert Racer’s front gear differential allows the left
and right wheels to spin at different speeds while turning

so that
the tires do not scuff or skid. This decreases the turning radius and
increases steering performance.

The performance of the front differential can be tuned for different
driving conditions and performance requirements. The differential is
filled with silicone differential fluid, and is sealed to maintain consistent
long-term performance. Changing the oil in the differential with either
lower or higher viscosity oil will vary the performance characteristics of
the differential. Changing to a higher viscosity oil in the differential will
reduce the tendency for engine power to be transferred to the wheel
with the least traction. You may notice this when making sharp turns
on slick surfaces. The unloaded wheels on the inside of the turn have
the least traction and tend to spin up to extremely high rpms. Higher
viscosity (thicker) oil causes the differential to act like a limited-slip
differential, distributing more equal power to the left and right wheels.
Your Desert Racer will generally benefit from higher viscosity oil when
climbing, rock crawling, or racing on low traction surfaces.

Note: Heavier oil will allow power to be transferred even with one or
more tires off the ground. This can make the vehicle more likely to
overturn.

From the factory, the front differential is filled with SAE 30,000W
viscosity silicone oil. Only use silicone oil in the differential. Traxxas
offers SAE 10,000W and 50,000W viscosity oil (see your parts list). The
differential has to be removed from the vehicle and disassembled to
change/replace oil.

Never slide the threads on
the shock rod past the X-ring
seal when it is installed and
compressed by the bottom
cap of the shock. Doing so will
damage the seal and cause
shock oil to leak.

DESERT RACER • 31

TQi ADVANCED TUNING GUIDE

Starting Over:

Restoring Factory Defaults

When programming your

TQi transmitter, you may feel
the need to start over with
a clean slate. Follow these
simple steps to restore the
factory settings:

1. Turn the transmitter off.

2. Hold both MENU and SET.

3. Turn the transmitter on.

4. Release MENU and SET.
The transmitter LED will
blink red.

5. Press SET to clear settings.
The LED will turn solid
green and the transmitter
is restored to default.

Throttle Trim Seek Mode

When the Multi-Function knob is
set to throttle trim, the transmitter
remembers the throttle trim
setting. If the throttle trim knob is
moved from the original setting
while the transmitter is off, or while
the transmitter was used to control
another model, the transmitter
ignores the actual position of
the trim knob. This prevents the
model from accidentally running
away. The LED on the face of the
transmitter will rapidly blink green
and the throttle trim knob (Multi­Function knob) will not adjust the
trim until it is moved back to its
original position saved in memory.
To restore throttle trim control,
simply turn the Multi-Function
knob either direction until the LED
stops blinking.

32 • DESERT RACER

Your Traxxas transmitter has a programmable

Multi-Function knob
that can be set to control various advanced transmitter functions (set to
Traxxas Stability Management (TSM) by default, see page 19). Accessing
the programming menu is done by using the menu and set buttons on
the transmitter and observing signals from the LED. An explanation of
the menu structure follows on page 34. Experiment with the settings and
features to see if they can improve your driving experience.

Steering Sensitivity (Exponential)

The Multi-Function knob on the TQi transmitter can be set to control
Steering Sensitivity (also known as exponential). The standard setting
for Steering Sensitivity is “normal (zero exponential),” with the dial full
left in its range of travel. This setting provides linear servo response: the
steering servo’s movement will correspond exactly with the input from
the transmitter’s steering wheel. Turning the knob clockwise from center
will result in “negative exponential” and decrease steering sensitivity by
making the servo less responsive near neutral, with increasing sensitivity as
the servo nears the limits of its travel range. The farther you turn the knob,
the more pronounced the change in steering servo movement will be.
The term “exponential” comes from this effect; the servo’s travel changes
exponentially relative to the input from the steering wheel. The exponential
effect is indicated as a percentage—the greater the percentage, the greater
the effect. The illustrations below show how this works.

Normal Steering Sensitivity (0%
exponential):

In this illustration, the steering
servo’s travel (and with it, the
steering motion of the model’s
front wheels) corresponds
precisely with the steering wheel.
The ranges are exaggerated for
illustrative purposes.

Decreased Steering Sensitivity
(Negative Exponential):

By turning the Multi-Function
knob clockwise, the steering
sensitivity of the model will be
decreased. Note that a relatively
large amount of steering wheel
travel results in a smaller amount
of servo travel. The farther
you turn the knob, the more
pronounced the effect becomes.
Decreased steering sensitivity may
be helpful when driving on low­traction surfaces, when driving at
high speed, or on tracks that favor sweeping turns where gentle steering inputs are
required. The ranges are exaggerated for illustrative purposes.

Turning Range

at Transmitter

Effective Turning

Range on Model

Note: Moving the mounting screw to
the optional lower hole in the servo
horn (as shown) can also help decrease
steering sensitivity when driving
the Desert Racer at higher speeds in
locations with large open spaces and
few obstacles.

Throttle Sensitivity (Throttle Exponential)

The Multi-Function knob can be set to control Throttle Sensitivity.
Throttle Sensitivity works the same way as Steering Sensitivity, but
applies the effect to the throttle channel. Only forward throttle is
affected; brake/reverse travel remains linear regardless of the Throttle
Sensitivity setting.

Steering Percentage (Dual-Rate)

The Multi-Function knob can be set to control the amount (percentage)
of servo travel applied to steering. Turning the Multi-Function knob
fully clockwise will deliver maximum steering throw; turning the knob
counterclockwise reduces steering throw (Note: Turning the dial
counterclockwise to its stop will eliminate all servo travel). Be aware
that the steering End Point settings define the servo’s maximum
steering throw. If you set Steering Percentage to 100% (by turning the
Multi-Function knob fully clockwise), the servo will travel all the way to
its selected end point, but not past it. Many racers set Dual-Rate so they
have only as much steering throw as they need for the track’s tightest
turn, thus making the model easier to drive throughout the rest of the
course. Reducing steering throw can also be useful in making a model
easier to control on high-traction surfaces, and limiting steering output
for oval racing where large amounts of steering travel are not required.

Braking Percentage

The Multi-Function knob may also be set to control the amount of brake
travel applied by the servo in a nitro-powered model. Electric models do
not have a servo-operated brake, but the Braking Percentage function
still operates the same way in electric models. Turning the Multi-Function
knob full clockwise will deliver maximum brake throw; turning the
knob counterclockwise reduces brake throw (Note: Turning the dial
counterclockwise to its stop will eliminate all brake action).

Throttle Trim

Setting the Multi-Function knob to serve as throttle trim will allow you
to adjust the throttle’s neutral position to prevent unwanted brake drag
or throttle application when the transmitter trigger is at neutral. Note:
Your transmitter is equipped with a Throttle Trim Seek mode to prevent
accidental runaways. See the sidebar for more information.

TQi ADVANCED TUNING GUIDE

Steering and Throttle End Points

The TQi transmitter allows you to choose the limit of the servo’s travel
range (or its “end point”) independently for left and right travel (on the
steering channel) and throttle/brake travel (on the throttle channel).
This allows you to fine-tune the servo settings to prevent binding
caused by the servo moving steering or throttle linkages (in the case
of a nitro model) farther than their mechanical limits. The end point
adjustment settings you select will represent what you wish to be the
servo’s maximum travel; the Steering Percentage or Braking Percentage
functions will not override the End Point settings.

Steering and Throttle Sub-Trim

The Sub-Trim function is used to precisely set the neutral point of the
steering or throttle servo in the event that simply setting the trim knob
to “zero” does not completely center the servo. When selected, Sub-Trim
allows finer adjustment to the servo output shaft’s position for precise

Setting Lock

Once you’ve adjusted all of these settings the way you like them, you
may want to disable the Multi-Function knob so none of your settings
can be changed. This is especially handy if you operate multiple
vehicles with a single transmitter via Traxxas Link

Multiple Settings and the Multi-Function Knob

It is important to note that settings made with the Multi-Function
knob are “overlaid” on top of each other. For example, if you assign the
Multi-Function to adjust Steering Percentage and set it for 50%, then
reassign the knob to control Steering Sensitivity, the transmitter will
“remember” the Steering Percentage setting. Adjustments you make
to Steering Sensitivity will be applied to the 50% steering throw setting
you selected previously. Likewise, setting the Multi-Function knob to
“disabled” will prevent the knob from making further adjustments, but

the last setting of the Multi-Function knob will still apply.
setting of the neutral point. Always set the Steering Trim knob to zero
before making final adjustment (if required) using Sub-Trim. If Throttle
Trim has been previously adjusted, the Throttle Trim will need to be
reprogrammed to “zero” before making final adjustment using Sub-Trim.

TRANSMITTER LED CODES

LED Color / Pattern Name Notes

Solid green Normal Driving Mode See page 17 for information on how to use your transmitter controls.

Slow red (0.5 sec on / 0.5 sec off) Binding See page 18 for more information on binding.

Flashing fast green (0.1 sec on / 0.15 sec off) Throttle Trim Seek Mode

Flashing medium red (0.25 sec on / 0.25 sec off) Low Battery Alarm Put new batteries in the transmitter. See page 14 for more information.

Flashing fast red (0.125 sec on / 0.125 sec off) Link Failure / Error

Programming Patterns

or

Counts out number (green or red), then pauses Current menu position See Menu Tree for more information.

x

Fast green 8 times Menu setting accepted (on SET)

8

Fast red 8 times Menu SET invalid User error, such as trying to delete a locked model.

x

8

Turn the Multi-Function knob right or left until the LED stops flashing.
See page 31 for more information.

Transmitter and receiver are no longer bound. Turn the system off and then
back on to resume normal operation. Find source of the link failure (i.e., out of
range, low batteries, damaged antenna).

RECEIVER LED CODES

LED Color / Pattern Name Notes

Solid green Normal Driving Mode See page 17 for information on how to use your transmitter controls.

Slow red (0.5 sec on / 0.5 sec off) Binding See page 18 for more information on binding.

Flashing fast red (0.125 sec on / 0.125 sec off) Fail-Safe / Low Voltage Detect

Consistent low voltage in the receiver triggers Fail-Safe so there is enough
power to center the throttle servo before it completely loses power.

™

Model Memory.

Failsafe

Your Traxxas radio system is
equipped with a built-in failsafe
function that returns the throttle
to its last saved neutral position in
the event of a signal loss. The LED
on the transmitter and the receiver
will rapidly flash red.

DESERT RACER • 33

TQi ADVANCED TUNING GUIDE

TRAXXAS LINK MODEL MEMORY

Traxxas Link Model Memory is an exclusive, patented feature of the
TQi transmitter. Each time the transmitter is bound to a new receiver, it
saves that receiver in its memory, along with all the settings assigned
to that receiver. When the transmitter and any bound receiver are
switched on, the transmitter automatically recalls the settings for that
receiver. There is no need to manually select your vehicle from a list of
model memory entries.

Model Lock

The Traxxas Link Model Memory feature can store up to thirty models
(receivers) in its memory. If you bind a thirty-first receiver, Traxxas Link
Model Memory will delete the “oldest” receiver from its memory (in
other words, the model you used the longest time ago will be deleted).
Activating Model Lock will lock the receiver in memory so it cannot be
deleted.

You may also bind multiple TQi transmitters to the same model, making
it possible to pick up any transmitter and any previously bound model
in your collection and simply turn them on and drive. With Traxxas
Link Model Memory, there is no need to remember which transmitter
goes with which model, and there is never a need to have to select any
model from a list of model memory entries. The transmitter and receiver
do it all for you automatically.

To activate Model Lock:

1. Switch on the transmitter and receiver you wish to lock.

2. Press and hold MENU. Release when the status LED blinks green.

3. Press MENU three times. The status LED will blink green four
times repeatedly.

4. Press SET. The status LED will blink green in single-flash intervals.

5. Press SET once. The status LED will blink red once repeatedly.

6. Press MENU once. The status LED will blink red twice repeatedly.

7. Press SET. The LED will blink rapidly green. The memory is now
locked. Press and hold MENU to return to driving mode.

Note: To unlock a memory, press SET twice at step 5. The LED will

blink rapidly green to indicate the model is unlocked. To unlock all
models, press MENU twice at step 6 and then press SET.

To delete a model:

At some point, you may wish to delete a model you no-longer drive
from the memory.

1. Switch on the transmitter and receiver you wish to delete.

2. Press and hold MENU. Release when the status LED blinks green.

3. Press MENU three times. The status LED will blink green four

times repeatedly.

4. Press SET once. The status LED will blink green once repeatedly.

5. Press MENU once. The status LED will blink green twice repeatedly.

6. Press SET. The memory is now selected to be deleted. Press SET to

delete the model. Press and hold MENU to return to driving mode.

34 • DESERT RACER

MENU TREE

The Menu Tree below shows how to navigate through
the TQi transmitter’s various settings and functions.
Press and hold MENU to enter the Menu Tree, and use
the following commands to navigate through the menu
and select options.

MENU:

When you enter a menu, you always start at the

top. Press MENU to move down the Menu Tree.
When you reach the bottom of the tree, pressing
MENU again will return you to the top.

SET:

Press SET to move across the Menu Tree and select

options. When an option is committed to the
transmitter’s memory, the status LED will rapidly
blink green.

BACK:

Press both MENU and SET to go back one level in

the Menu Tree.

EXIT: Press and hold MENU to exit programming.

Your selected options will be saved.

ECHO:

Press and hold SET to activate the “echo” function.

Echo will “play back” your current position on the
Menu Tree should you lose your place. For example:
If your current position is Steering Channel End
Points, holding SET will cause the LED to blink green
twice, green once, and then red three times. Echo
will not alter your adjustments or change your
position in the programming sequence.

Below is an example of how to access a function in the Menu
Tree. In the example, the user is setting the Multi-Function knob
to be a Steering % (Dual-Rate) control.

To set the Multi-Function knob to control STEERING % (DUAL-RATE):

1. Switch the transmitter on.

2. Press and hold MENU until the green LED lights. It will blink in single
intervals.

3. Press SET. The red LED will blink in single intervals to indicate Steering
Sensitivity (Expo) has been selected.

4. Press MENU twice. The red LED will blink three times repeatedly to
indicate Steering % (Dual-Rate) has been selected.

5. Press SET to select. The green LED will blink 8 times fast to indicate
successful selection.

6. Press and hold MENU to return to driving mode.

Restoring Factory Defaults:

Transmitter

OFF

*Torque Control is a feature designed only for use with the power system in the Traxxas Funny Car Race Replica (Model #6907).

Hold both

MENU and SET

Transmitter ONRelease MENU and SET

red LED blinks

Enter Programming

Press and hold
MENU for 3 seconds

Multi-Function Knob

1

One Blink Green

Press

MENU

Channel Setup

2

Two Blinks Green

Press

MENU

Mode Selection

3

Three Blinks Green

Press

MENU

Traxxas-Link

4

Four Blinks Green

Press SET to clear settings. LED will turn

solid green. Transmitter is restored to default

Press

SET

Press

SET

Press

SET

Press

SET

Press MENU to move through options.
Press SET to select an option.

Steering Sensitivity (Expo)

1

One Blink Red

Throttle Sensitivity (Expo)

2

Two Blinks Red

Steering % (Dual-Rate)

3

Three Blinks Red

Braking %

4

Four Blinks Red

Throttle Trim

5

Five Blinks Red

Knob Disabled

6

Six Blinks Red

Torque Control*

7

Seven Blinks Red

TSM

8

Eight Blinks Red

Steering (Channel 1)

1

One Blink Green

Press MENU

Throttle (Channel 2)

2

Two Blinks Green

Press SET to select an option.

Electric

1

One Blink Red

Press MENU

Nitro

2

Two Blinks Red

Model Locking

1

One Blink Green

Press

MENU

Delete Model

2

Two Blinks Green

Press

Press

SET

SET

Press

SET

Press

SET

TQi ADVANCED TUNING GUIDE

Note: The transmitter is “live” during programming
so you can test the settings real time without having
to exit the Menu Tree.

Press MENU to move through options.
Press SET to select an option.

Servo Reversing

1

One Blink Red

Sub-Trim

2

Two Blinks Red

End Points

3

Three Blinks Red

Turn left to desired end point and press set to save.
To reset max throw: Let go of controls and press SET.

Reset End Points

4

Four Blinks Red

Servo Reversing

1

One Blink Red

Sub-Trim

2

Two Blinks Red

End Points

3

Three Blinks Red

forward to desired end point and press set to save.
To reset max throw: Let go of controls and press SET.

Reset End Points

4

Four Blinks Red

Unlock

1

One Blink Red

Lock

2

Two Blinks Red

Unlock All

3

Three Blinks Red

Confirm Deletion

1

One Blink Red

Press SET to reverse
servo direction.

Use knob to adjust
sub-trim. Press SET to save.

Use steering wheel to
adjust. Turn right to desired
end point, press set to save.

Press SET to restore factory
default end points.

Press SET to reverse
servo direction.

Use knob to adjust sub­trim. Press SET to save.

Use trigger to adjust. Pull
back to desired end point,
press set to save. Push

Press SET to restore factory
default end points.

TQi ADVANCED TUNING GUIDE

Set Multi-Function
knob for STEERING
SENSITIVITY (Expo)

Set Multi-Function
knob for THROTTLE
SENSITIVITY (Expo)

Set Multi-Function
knob for STEERING
Dual-Rate (%)

Set Multi-Function
knob for BRAKING
PERCENTAGE (%)

Set Multi-Function
knob for
THROTTLE TRIM

To LOCK the
Multi-Function knob

To REVERSE
the direction of
STEERING servo

To set the SUB TRIM
of the STEERING
servo

To set the END
POINTS of the
STEERING servo

To reset the END
POINTS of STEERING
servo to defaults

To REVERSE
the direction of
THROTTLE servo

To set the SUB TRIM
of the THROTTLE
servo

To set the END
POINTS of the
THROTTLE servo

To reset the END
POINTS of THROTTLE
servo to defaults

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

Press SET to confirm

green LED blinks (x8)

Press MENU to confirm

red LED blinks (x2)

Press MENU twice

red LED blinks (x3)

Press MENU 3 times

red LED blinks (x4)

Press MENU 4 times

red LED blinks (x5)

Press MENU 5 times

red LED blinks (x6)

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

Press SET

Press SET

Press SET

Press SET

Press SET

Press SET

Press SET

Press SET

x

8

returns to driving mode

x

2

x

3

x

4

x

5

x

6

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press MENU

Press MENU

Press MENU

Press MENU

x

x

x

x

x

x

x

x

x

Press/hold MENU

Press SET to select

green LED blinks (x8)

Press SET to select

green LED blinks (x8)

Press SET to select

green LED blinks (x8)

Press SET to select

green LED blinks (x8)

Press SET to lock

green LED blinks (x8)

green LED blinks (x2)

green LED blinks (x2)

green LED blinks (x2)

green LED blinks (x2)

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

Press SET to reverse

red LED blinks (x2)

Press MENU twice

red LED blinks (x3)

Press MENU 3 times

red LED blinks (x4)

2

2

2

2

servo direction

Press MENU

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

x

8

x

2

x

3

x

4

Adjust the Multi-

Function knob until the

LED turns solid green.

Press/hold MENU

returns to driving mode

Use Multi-Function

knob to set neutral

Turn steering

wheel to desired max

left and right travel

x

Press SET

to reset end points

Press SET to reverse

servo direction

x

Press MENU

red LED blinks (x2)

x

Press MENU twice

red LED blinks (x3)

x

Press MENU 3 times

red LED blinks (x4)

to save each position

8

returns to driving mode

returns to driving mode

2

Use Multi-Function

3

trigger to set desired
max throttle or brake

4

green LED blinks (x8)

MENU TREE FORMULAS

To select functions and make adjustments to the TQi transmitter without
referencing the Menu Tree, turn your transmitter on, find the function in the
left column you wish to adjust, and simply follow the corresponding steps

1

Always turn your

transmitter on first.

x

8

Press SET

to save position

x

Press SET

Press/hold MENU

Press/hold MENU

knob to set neutral

Use throttle

x

Press SET

Press/hold MENU

returns to driving mode

8

Turn steering wheel

Use trigger to test

8

Press/hold MENU

returns to driving mode

to test settings

Press SET

to save position

Press SET to save

IF END POINTS

ARE OK:

Press/hold MENU

returns to driving mode

Press/hold MENU

returns to driving mode

IF END POINTS

ARE OK:

Press/hold MENU

returns to driving mode

IF END POINTS

NEED TO BE

CHANGED:

Press SET

and repeat steps 6-8

IF END POINTS

NEED TO BE

CHANGED:

Press SET

and repeat steps 7-9

.

TQi ADVANCED TUNING GUIDE

PROGRAMMING YOUR TQi TRANSMITTER WITH
YOUR APPLE iPHONE, iPAD, iPOD TOUCH, OR

ANDROID MOBILE DEVICE

The Traxxas Link™ Wireless Module
(part #6511, sold separately) for the TQi
transmitter installs in minutes to transform
your Apple® iPhone®, iPad®, iPod touch®,
or Android™ device into a powerful
tuning tool that allows you to replace the
transmitter’s button/LED programming
system with an intuitive, high-definition,
full-color graphical user interface.

Traxxas Link

The powerful Traxxas Link app (available in the Apple App Store
Google Play™) gives you complete control over the operation and tuning
of your Traxxas model with stunning visuals and absolute precision. Install
Traxxas Link telemetry sensors on the model, and Traxxas Link displays
real-time data such as speed, RPM, temperature, and battery voltage.

Compatible with:
iPod touch (5th generation and later)
iPad mini
iPad Pro

iPad 2
iPad Air
iPhone 4s (and later)
Android 4.4 (and later)

SM

or on

Apple, the Apple logo, iPhone, iPad, and iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries.
App Store is a service mark of Apple Inc. Android and Google Play are trademarks of Google Inc.

Intuitive iPhone, iPad, iPod
touch, and Android interface

Traxxas Link makes it easy to
learn, understand, and access
powerful tuning options. Control
Drive Effects settings such as
TSM assistance percentage;
steering and throttle sensitivity;
steering percentage; braking
strength; and throttle trim by
simply touching and dragging the

Tap and slide to adjust TSM, Steering Sensitivity,

Throttle Trim, Braking Percent, and more!

sliders on the screen.

Real-Time Telemetry

When you equip your model
with sensors, the Traxxas Link
dashboard comes to life showing
you speed, battery voltage, RPM,
and temperature. Set threshold
warnings and log maximums,
minimums, or averages. Use the
recording function to document
your dashboard view, with
sound, so that you can keep
your eyes on your driving and

The customizable Traxxas Link dashboard delivers

real-time rpm, speed, temperature, and voltage data.

not miss a single apex.

Manage up to 30 Models with Traxxas Link

The TQi radio system
automatically keeps track of
what vehicles it has bound to
and what settings were used
for each--up to 30 models total!
Traxxas Link provides a visual
interface to name the models,
customize their settings, attach
profiles, and lock them into
memory. Simply choose a model
and any previously bound

Traxxas Link Model Memory simplifies organizing

transmitter, power them up,
and start having fun.

The Traxxas Link
Wireless Module is sold
separately (part #6511).
The Traxxas Link
application is available
from the Apple App store
for iPhone, iPad, or iPod
touch and on Google
Play for Android devices.
iPhone, iPad, iPod touch, or
the Android device are not
included with the Traxxas
Link Wireless Module.

For more information
about the Traxxas Link
Wireless Module and the
Traxxas Link application,
visit Traxxas.com.

your collection of vehicles.

DESERT RACER • 37

191101 85086-4-OM-EN-R00

owner’s manual

6250 TRAXXAS WAY, McKINNEY, TEXAS 75070

1-888-TRAXXAS