Xray T4 (2018) Instruction Manual

2

BEFORE YOU START

The T4 is a high-competition, high-quality, 1/10-scale touring car intended for
persons aged 16 years and older with previous experience building and operating
RC model racing cars. This is not a toy; it is a precision racing model. This model
racing car is not intended for use by beginners, inexperienced customers, or
by children without direct supervision of a responsible, knowledgeable adult.
If you do not fulfill these requirements, please return the kit in unused and
unassembled form back to the shop where you have purchased it.

Before building and operating your T4, YOU MUST read through all of the
operating instructions and instruction manual and fully understand them to get

the maximum enjoyment and prevent unnecessary damage. Read carefully and
fully understand the instructions before beginning assembly.

Make sure you review this entire manual, download and use set-up book from the
web, and examine all details carefully. If for some reason you decide The T4 is
not what you wanted or expected, do not continue any further. Your hobby dealer
cannot accept your T4 kit for return or exchange after it has been partially or fully
assembled.

Contents of the box may differ from pictures. In line with our policy of continuous
product development, the exact specifications of the kit may vary without prior
notice.

SAFETY PRECAUTIONS

Contains:
LEAD (CAS 7439-92-1) ANTIMONY (CAS 7440-36-0)
WARNING: This product contains a chemical known to the state of California to
cause cancer and birth defects or other reproductive harm.
CAUTION: CANCER HAZARD
Contains lead, a listed carcinogen. Lead is harmful if ingested. Wash thoroughly
after using. DO NOT use product while eating, drinking or using tobacco
products. May cause chronic effects to gastrointestinal tract, CNS, kidneys, and
blood. MAY CAUSE BIRTH DEFECTS.

When building, using and/or operating this model always wear protective
glasses and gloves.

Take appropriate safety precautions prior to operating this model. You are
responsible for this model‘s assembly and safe operation! Please read the
instruction manual before building and operating this model and follow
all safety precautions. Always keep the instruction manual at hand for quick
reference, even after completing the assembly. Use only genuine and original
authentic XRAY parts for maximum performance. Using any third party parts on
this model will void guaranty immediately.

Improper operation may cause personal and/or property damage. XRAY and
its distributors have no control over damage resulting from shipping, improper
construction, or improper usage. XRAY assumes and accepts no responsibility for
personal and/or property damages resulting from the use of improper building
materials, equipment and operations. By purchasing any item produced by XRAY,
the buyer expressly warrants that he/she is in compliance with all applicable
federal, state and local laws and regulation regarding the purchase, ownership
and use of the item. The buyer expressly agrees to indemnify and hold harmless
XRAY for all claims resulting directly or indirectly from the purchase, ownership
or use of the product. By the act of assembling or operating this product, the
user accepts all resulting liability. If the buyer is not prepared to accept this
liability, then he/she should return this kit in new, unassembled, and unused
condition to the place of purchase.

IMPORTANT NOTES – GENERAL

• This product is not suitable for children under 16 years of age without the
direct supervision of a responsible and knowledgeable adult.

• Carefully read all manufacturers warnings and cautions for any parts used in
the construction and use of your model.

• Assemble this kit only in places away from the reach of very small children.

• First-time builders and users should seek advice from people who have
building experience in order to assemble the model correctly and to allow the
model to reach its performance potential.

• Exercise care when using tools and sharp instruments.

• Take care when building, as some parts may have sharp edges.

• Keep small parts out of reach of small children. Children must not be allowed
to put any parts in their mouth, or pull vinyl bag over their head.

• Read and follow instructions supplied with paints and/or cement, if used (not
included in kit).

• Immediately after using your model, do NOT touch equipment on the
model such as the motor and speed controller, because they generate high
temperatures. You may seriously burn yourself seriously touching them.

• Follow the operating instructions for the radio equipment at all times.

• Do not put fingers or any objects inside rotating and moving parts, as this
may cause damage or serious injury as your finger, hair, clothes, etc. may get
caught.

• Be sure that your operating frequency is clear before turning on or running
your model, and never share the same frequency with somebody else at the
same time. Ensure that others are aware of the operating frequency you are
using and when you are using it.

• Use a transmitter designed for ground use with RC cars. Make sure that no
one else is using the same frequency as yours in your operating area. Using
the same frequency at the same time, whether it is driving, flying or sailing,
can cause loss of control of the RC model, resulting in a serious accident.

• Always turn on your transmitter before you turn on the receiver in the car.
Always turn off the receiver before turning your transmitter off.

• Keep the wheels of the model off the ground when checking the operation of
the radio equipment.

• Disconnect the battery pack before storing your model.

• When learning to operate your model, go to an area that has no obstacles
that can damage your model if your model suffers a collision.

• Remove any sand, mud, dirt, grass or water before putting your model away.

• If the model behaves strangely, immediately stop the model, check and clear
the problem.

• To prevent any serious personal injury and/or damage to property, be
responsible when operating all remote controlled models.

• The model car is not intended for use on public places and roads or areas where
its operation can conflict with or disrupt pedestrian or vehicular traffic.

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

• Do not use your model:

- Near real cars, animals, or people that are unaware that an RC car is being
driven.

- In places where children and people gather

- In residential districts and parks

- In limited indoor spaces

- In wet conditions

- In the street

- In areas where loud noises can disturb others, such as hospitals and
residential areas.

- At night or anytime your line of sight to the model may be obstructed or
impaired in any way.

To prevent any serious personal injury and/or damage to property, please be
responsible when operating all remote controlled models.

Failure to follow these instructions will be considered as abuse and/or neglect.

CUSTOMER SUPPORT

XRAY Europe

K Vystavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

We have made every effort to make these instructions as easy to understand as possible.
However, if you have any difficulties, problems, or questions, please do not hesitate to
contact the XRAY support team at [e-mail]. Also, please visit our Web site
at www.teamxray.com to find the latest updates, set-up information, option parts, and
many other goodies. We pride ourselves on taking excellent care of our customers.

You can join thousands of XRAY fans and enthusiasts in our online community at:

www.teamxray.com

XRAY USA

RC America, 2030 Century Center Blvd #15
Irving, TX 75062
USA
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

3

IMPORTANT NOTES – ELECTRICAL

• Insulate any exposed electrical wiring (using heat shrink tubing or electrical
tape) to prevent dangerous short circuits. Take maximum care in wiring,
connecting and insulating cables. Make sure cables are always connected
securely. Check connectors for if they become loose. And if so, reconnect
them securely. Never use RC models with damaged wires. A damaged wire
is extremely dangerous, and can cause short-circuits resulting in fire. Please
have wires repaired at your local hobby shop.

• Low battery power will result in loss of control. Loss of control can occur due to
a weak battery in either the transmitter or the receiver. Weak running battery
may also result in an out of control car if your car‘s receiver power is supplied
by the running battery. Stop operation immediately if the car starts to slow
down.

• When not using RC model, always disconnect and remove battery.

• Do not disassemble battery or cut battery cables. If the running battery short­circuits, approximately 300W of electricity can be discharged, leading to fire
or burns. Never disassemble battery or cut battery cables.

• Use a recommended charger for the receiver and transmitter batteries
and follow the instructions correctly. Over-charging, incorrect charging, or
using inferior chargers can cause the batteries to become dangerously hot.

Recharge battery when necessary. Continual recharging may damage battery
and, in the worst case, could build up heat leading to fire. If battery becomes
extremely hot during recharging, please ask your local hobby shop for check
and/or repair and/or replacement.

• Regularly check the charger for potential hazards such as damage to the
cable, plug, casing or other defects. Ensure that any damage is rectified
before using the charger again. Modifying the charger may cause short-circuit
or overcharging leading to a serious accident. Therefore do not modify the
charger.

• Always unplug charger when recharging is finished.

• Do not recharge battery while battery is still warm. After use, battery retains
heat. Wait until it cools down before charging.

• Do not allow any metal part to short circuit the receiver batteries or other
electrical/electronic device on the model.

• Immediately stop running if your RC model gets wet as may cause short circuit.

• Please dispose of batteries responsibly. Never put batteries into fire.

WARRANTY

XRAY guarantees this model kit to be free from defects in both material and
workmanship within 30 days of purchase. The total monetary value under
warranty will in no case exceed the cost of the original kit purchased. This
warranty does not cover any components damaged by use or modification or
as a result of wear. Part or parts missing from this kit must be reported within
30 days of purchase. No part or parts will be sent under warranty without proof
of purchase. Should you find a defective or missing part, contact the local
distributor. Service and customer support will be provided through local hobby
store where you have purchased the kit, therefore make sure to purchase any
XRAY products at your local hobby store. This model racing car is considered
to be a high-performance racing vehicle. As such this vehicle will be used in
an extreme range of conditions and situations, all which may cause premature
wear or failure of any component. XRAY has no control over usage of vehicles
once they leave the dealer, therefore XRAY can only offer warranty against all
manufacturer‘s defects in materials, workmanship, and assembly at point of
sale and before use. No warranties are expressed or implied that cover damage
caused by what is considered normal use, or cover or imply how long any
model cars‘ components or electronic components will last before requiring
replacement.

Due to the high performance level of this model car you will need to periodically
maintain and replace consumable components. Any and all warranty coverage
will not cover replacement of any part or component damaged by neglect,
abuse, or improper or unreasonable use. This includes but is not limited to

damage from crashing, chemical and/or water damage, excessive moisture,
improper or no maintenance, or user modifications which compromise the
integrity of components. Warranty will not cover components that are considered
consumable on RC vehicles. XRAY does not pay nor refund shipping on any
component sent to XRAY or its distributors for warranty. XRAY reserves the right
to make the final determination of the warranty status of any component or part.

Limitations of Liability

XRAY makes no other warranties expressed or implied. XRAY shall not be liable
for any loss, injury or damages, whether direct, indirect, special, incidental, or
consequential, arising from the use, misuse, or abuse of this product and/or any
product or accessory required to operate this product. In no case shall XRAY‘s
liability excess the monetary value of this product.

Take adequate safety precautions prior to operating this model. You
are responsible for this model’s assembly and safe operation.

Disregard of the any of the above cautions may lead to accidents,
personal injury, or property damage. XRAY MODEL RACING CARS
assumes no responsibility for any injury, damage, or misuse of this
product during assembly or operation, nor any addictions that may
arise from the use of this product.
All rights reserved.

QUALITY CERTIFICATE

XRAY MODEL RACING CARS uses only the highest quality materials, the best
compounds for molded parts and the most sophisticated manufacturing processes
of TQM (Total Quality Management). We guarantee that all parts of a newly­purchased kit are manufactured with the highest regard to quality. However, due
to the many factors inherent in model racecar competition, we cannot guarantee

any parts once you start racing the car. Products which have been worn out,
abused, neglected or improperly operated will not be covered under warranty.
We wish you enjoyment of this high-quality and high-performance RC car and
wish you best success on the track!

In line with our policy of continuous product development, the exact specifications of the kit may
vary. In the unlikely event of any problems with your new kit, you should contact the model shop
where you purchased it, quoting the part number.
We do reserve all rights to change any specification without prior notice. All rights reserved.

R/C & BUILDING TIPS

• Make sure all fasteners are properly tightened. Check them periodically.

• Make sure that chassis screws do not protrude from the chassis.

• For the best performance, it is very important that great care is taken to ensure
the free movement of all parts.

• Clean all ball-bearings so they move very easily and freely.

• Tap or pre-thread the plastic parts when threading screws.

• Self-tapping screws cut threads into the parts when being tightened. Do not use
excessive force when tightening the self-tapping screws because you may strip
out the thread in the plastic. We recommended you stop tightening a screw
when you feel some resistance.

• Ask your local hobby shop for any advice.

Please support your local hobby shop. We at XRAY Model Racing Cars support
all local hobby dealers. Therefore we ask you, if at all possible, to purchase
XRAY products at your hobby dealer and give them your support like we do. If
you have difficulty finding XRAY products, please check out www.teamxray.com
to get advice, or contact us via email at [e-mail], or contact the XRAY
distributor in your country.

4

NOT INCLUDED

To ensure that you always have access to the most up-to-date version
of the XRAY Set-up Book, XRAY will now be offering only the digital
online version on our website www.teamxray.com. By offering this online
version instead of including a hardcopy printed version in kits, you will
always be assured of having the most current updated version.

XRAY offers wide range of optional tuning parts which are listed in tables
like these. Please refer to the exploded view of each main section to
verify which part is included in the kit while all other parts are available
only as an optional part and must be purchased separately.

TOOLS REQUIRED

Side Cutters

(HUDY #189010)

Turnbuckle Wrench

4mm (HUDY #181040)

Reamer

(HUDY #107600) or

(HUDY #107601)

Combination Pliers

(HUDY #189020)

HUDY TOOLS:

Scissors

(HUDY #188990)

4.0 mm

Socket: 5.5mm Socket: 7.0mmAllen: 1.5mm Allen: 2.0mm Allen: 3.0mmAllen: 2.5mm

Pocket Hobby Knife

(HUDY #188981)

RC Shock-Plier Uni Tool

(HUDY #183011)

Arm Reamer 3.0mm

SYMBOLS USED

L=R

2x

CA

OIL

Part bags used Assemble left and

right sides the

same way

Assemble in the

specified order

Pay attention

here

Assemble as many

times as specified

(here twice)

Apply CA glue

EQUIPMENT REQUIRED

ITEMS INCLUDED

Apply oil

Optional

parts

Premium Silicone Oil

400cSt (HUDY #106340)

400cSt

3000cSt

Premium Silicone Oil

3000cSt (HUDY #106430)

TL

05

Tighten screw

gently

Completed

assembly

Detail view

Apply thread

lock

Apply greaseScale Ensure smooth

non-binding

movement

Graphite Grease

(HUDY #106210)

Follow Set-up Book

FRONT & REAR AXLES

SAMPLE OF
OPTIONAL PARTS

#30XXXX OPTION 1
#30XXXX OPTION 2
#30XXXX OPTION 3

1:1

DETAIL

Pinion Gear and Setscrew

Transmitter Steering ServoReceiver

Bearing Oil

(HUDY #106230)

Speed Controller

Electric Motor &

Lexan™ Paint Battery Charger

Wheels & Tires & Inserts

LiPo Battery190mm Bodyshell

Fibre Tape
(HUDY #107870)
Double-sided Tape
(HUDY #107875)

5

CA

At the beginning of each section is an exploded view of the parts to be assembled. There is also a list of all the
parts and part numbers that are related to the assembly of that section.

The part descriptions are color-coded to make it easier for you to identify the source of a part. Here are what
the different colors mean:

Style A - indicates parts that are included in the bag marked for the section.

STYLE B - indicates parts that are included in the box.

STYLE C - indicates parts that are already assembled from previous steps.

CHASSIS PREPARATION

COLOR INDICATIONS

CA

CA

To protect and seal edges of graphite parts, sand edges smooth and then apply CA glue.

Do this for: chassis edges, countersunk holes, and shock towers.

Apply only a bit of CA glue in the countersunk holes.

Apply only a bit of CA glue in the countersunk holes.

6

1. GEAR DIFFERENTIAL & FRONT SOLID AXLE

Use tweezers to
insert pin.

981210

P 2x10

981210

P 2x10

972050

O 5x2

972050

O 5x2

964050

S 5x15x0.3

964050

S 5x15x0.3

➊

➋

➌

➍

➍

➍

➎

➎

➊

➋

➌

➍

➎

DETAIL

➎

STEP

STEP DETAIL

30 4900 XRAY GEAR DIFFERENTIAL - SET
30 4910 COMPOSITE GEAR DIFF. CASE & COVER
30 4930 COMPOSITE GEAR DIFF BEVEL & SATELLITE GEARS (2+4)
30 4970 ALU GEAR DIFF OUTDRIVE ADAPTER - 7075 T6 (2)
30 4980 COMPOSITE GEAR DIFF CROSS PIN
30 4990 DIFF GASKET (4)
30 5105 XRAY MULTI-DIFF T3/T4 LiPo (OPTION)
30 5135 COMPOSITE SOLID AXLE DRIVESHAFT ADAPTERS (2)
30 5188 COMPOSITE SOLID AXLE 38T - SET

90 2310 HEX SCREW SH M3x10 (10)
90 3256 HEX SCREW SFH M2.5x6 (10)
94 1015 HIGH-SPEED BALL-BEARING 10x15x4 RUBBER SEALED (2)
96 4031 WASHER S 3.5x10x0.2 (10)
96 4050 WASHER S 5x15x0.3 (10)
97 1240 SILICONE O-RING 24x0.7 (10)
97 2050 SILICONE O-RING 5x2 (10)
98 1210 PIN 2x10 (10)

GEAR DIFFERENTIAL

➍

NOTE
ORIENTATION

#304971
HUDY SPRING STEEL™ OUTDRIVES

#304971
HUDY SPRING STEEL™ OUTDRIVES

BAG

304970

304910

964050

972050

304990

304910

903256

981210

981210

304970

941015

971240

972050

964031

304980

304930

304930

941015

#305137
STEEL SOLID AXLE DRIVESHAFT ADAPTERS
HUDY SPRING STEEL™

#305136
ALU SOLID DRIVESHAFT ADAPTERS

305188

941015

941015

305135

902310

305135

305188

902310

COMPOSITE SOLID AXLE

CUTAWAY VIEW

#304932
GRAPHITE GEAR DIFF BEVEL & SATELLITE GEARS (2+4)

#304932
GRAPHITE GEAR DIFF BEVEL & SATELLITE GEARS (2+4)

DETAIL

#309002
SET OF CERAMIC BALL-BEARINGS (14)

7

964031

S 3.5x10x0.2

1. GEAR DIFFERENTIAL & FRONT SOLID AXLE

971240

O 24x0.7

After disassembling the gear diff the large O-ring may have an increased size and
may be more difficult to re-install. We recommend either inserting the old O-ring
carefully in the diff cover, or replacing the old O-ring with a new O-ring if the old
one cannot be made to fit properly.

Fill differential up to the top of the diff pin.

DO NOT fill the diff to the top of the housing.

TO ENSURE YOU HAVE THE SAME AMOUNT OF OIL FROM REBUILD TO REBUILD, DO THE FOLLOWING:

NOTE

SOFTER oil increases rear traction, HARDER oil increases on-power steering and
stability. It is important not to use soft oils in high-traction conditions as this would
not increase traction, but would make the car loose as the car would become too
twitchy.

However, if the oil is too soft, it could generate the same effect like the car has no
traction. Therefore it is very important to choose the correct oil very carefully. We
recommend using softer oil first, then try harder oil to better understand the effect
on the car’s behavior at the track. Choose the oil accordingly.

TIPS FOR FRONT DIFFERENTIAL

To increase on-power steering and cornering speed, the gear diff can also be used in the front.
NOTE: If you use the gear diff in the front, we recommend using optional #304971 HUDY
Spring Steel™ outdrives because the stress on the outdrives in the front is much higher
than in the rear.

USE THESE OILS FOR FRONT DIFFERENTIAL

500,000 cSt (HUDY #106650)
1,000,000 cSt (HUDY #106692)
2,000,000 cSt (HUDY #106694)

To make the front differential tighter, you can use cleaning gum instead of oil.

IMPORTANT!
Using cleaning gum instead of oil in the gear differential can lead to gear breakage because
the gears are working under dry conditions.

LOW TRACTION

1000cSt (HUDY #106410)
2000cSt (HUDY #106420)

TIPS FOR DIFFERENTIALS

7.90g

9.40g

#107865

HUDY Ultimate Digital Pocket

Scale 300g±0.01g

INITIAL SETTING

3000cSt

MEDIUM TRACTION

2000cSt (HUDY #106420)
3000cSt (HUDY #106430)
4000cSt (HUDY #106440)
5000cSt (HUDY #106450)

HIGH TRACTION

5000cSt (HUDY #106450)
6000cSt (HUDY #106460)
7000cSt (HUDY #106470)
8000cSt (HUDY #106480)
9000cSt (HUDY #106490)

10000cSt (HUDY #106510)

SUPER-HIGH TRACTION

10000cSt (HUDY #106510)
15000cSt (HUDY #106515)
20000cSt (HUDY #106520)

➊ Put the diff (without oil) on the scale and check the

weight (approximately 7.90g)

➋

Slowly pour oil into the diff and watch the weight. Add 1.5g of oil

into the diff. The approximate weight of the diff including oil is 9.40g.

7.9g + 1.5g = 9.4g

#304932
GRAPHITE GEAR DIFF BEVEL &
SATELLITE GEARS (2+4)

8

COMPOSITE FRONT SOLID AXLE

FRONT & REAR AXLES

1. GEAR DIFFERENTIAL & FRONT SOLID AXLE

902310

SH M3x10

941015

BB 10x15x4

941015

BB 10x15x4

OIL

OIL

OIL

903256

SFH M2.5x6

Tighten the screws equally but do
NOT tighten them completely.

Finish tightening in this order.

➊

➋

➌

➍

NOTE
ORIENTATION

DETAIL

BEARING OIL

(HUDY #106230)

BEARING OIL
(HUDY #106230)

BEARING OIL

(HUDY #106230)

BEARING OIL
(HUDY #106230)

#305136
ALU SOLID DRIVESHAFT ADAPTERS

#305137
STEEL SOLID AXLE DRIVESHAFT ADAPTERS
HUDY SPRING STEEL™

OIL

CUTAWAY VIEW

9

305188

940510

965050

304900

903306

903310

903306

903306

903304

303003-O

302034-O

303001-O

902306

902306

902306

305577

303085

981212

305784

940510

301145

903306

303002-O

902306

902306

902306

305446

960030

305432

302034-O

302760-O

302761-O

302761-O

302760-O

302034-O

302084

302062

302062

305521-K

902304

902306

302062

305577

965050

302034-O

2. CENTRAL TRANSMISSION

BAG

02

30 2034-O T4 ALU UPPER CLAMP WITH 5 ADJ. ROLL-CENTERS (L+R) - ORANGE
30 2062 T4 COMPOSITE ADJUSTMENT BALL-BEARING HUB (4)
30 2084 ULP SHOCK TOWER FRONT 3.0MM GRAPHITE
30 2760-O T4 ALU LOWER ADJUSTMENT BULKHEAD - FRONT R / REAR L - ORANGE
30 2761-O T4 ALU LOWER ADJUSTMENT BULKHEAD - FRONT L / REAR R - ORANGE
30 3001-O T4’18 ALU LAYSHAFT BULKHEAD RIGHT - ORANGE
30 3002-O T4’18 ALU MOTOR MOUNT - ORANGE
30 3003-O T4’18 ALU MOTOR MOUNT PLATE - ORANGE
30 3085 ULP SHOCK TOWER REAR 3.0MM GRAPHITE
30 5432 HIGH-PERFORMANCE KEVLAR® DRIVE BELT FRONT 3 x 513 MM
30 5446 HIGH-PERFORMANCE KEVLAR® DRIVE BELT REAR 3 x 189 MM
30 5521-K ALU SOLID LAYSHAFT - BLACK
30 5577 COMPOSITE FIXED PULLEY 20T (2)
30 5784 SPUR GEAR 84T / 48

90 2304 HEX SCREW SH M3x4 - STAINLESS (10)
90 2306 HEX SCREW SH M3x6 (10)
90 3304 HEX SCREW SFH M3x4 (10)
90 3306 HEX SCREW SFH M3x6 (10)
90 3310 HEX SCREW SFH M3x10 (10)
94 0510 HIGH-SPEED BALL-BEARING 5x10x4 RUBBER SEALED (2)
96 0030 NUT M3 (10)
96 5050 E-CLIP 5 (10)
98 1212 PIN 2x12 (10)

30 4900 XRAY GEAR DIFFERENTIAL - SET
30 5188 COMPOSITE SOLID AXLE 38T - SET

30 1145 T4’18 CHASSIS 2.2MM GRAPHITE

#301147
T4’18 ALU FLEX CHASSIS 2.0MM

#301146
T4’18 ALU CHASSIS 2.0MM

HIGH-PERFORMANCE KEVLAR® DRIVE BELT

#305432 FRONT 3 x 513 MM STANDARD INCLUDED
#305434 FRONT 3 x 513 MM LOW-FRICTION OPTION
#305446 REAR 3 x 189 MM STANDARD INCLUDED
#305447 REAR 3 x 189 MM LOW-FRICTION OPTION

#303004
T4’18 BRASS MOTOR MOUNT PLATE

OFFSET SPUR GEARS 48P

#305772 72T / 48P OPTION
#305776 76T / 48P OPTION
#305778 78T / 48P OPTION
#305779 79T / 48P OPTION
#305781 81T / 48P OPTION
#305784 84T / 48P INCLUDED

OFFSET SPUR GEARS 64P

#305860 90T / 64P OPTION
#305862 92T / 64P OPTION
#305866 96T / 64P OPTION
#305869 99T / 64P OPTION
#305870 100T / 64P OPTION
#305874 104T / 64P OPTION
#305876 106T / 64P OPTION
#305878 108T / 64P OPTION
#305880 110T / 64P OPTION
#305882 112T / 64P OPTION
#305884 114T / 64P OPTION

#302063
ALU ADJUSTMENT BALL-BEARING HUB (2)

#309002
SET OF CERAMIC BALL-BEARINGS (14)

#303071
BELT TENSIONER SET

10

GEARING ADJUSTMENT

902304

SH M3x4

965050

C5

981212

P 2x12

940510

BB 5x10x4

903306

SFH M3x6

903304

SFH M3x4

960030

N M3

903310

SFH M3x10

902306

SH M3x6

NOTE

ORIENTATION

NOTE ORIENTATION

Short belt Long belt

BEARING OIL

(HUDY #106230)

OIL

OIL

BEARING OIL
(HUDY #106230)

➊

➋

3x10

3x6

3x6

3x6

3x6

3x6

3x4

3x6

3x6

3x6

3x6

3x6

3x6

3x6

3x6

3x6

The back screws generates more traction
and makes the car more stable in the
chicanes. Recommended for low-medium
traction tracks.

The front screw improves steering response
and in-corner steering. Recommended for
medium-high traction tracks.

Do not tighten fully

Do not tighten fully yet,
the nut will be tightened
after the motor mount is
mounted on the chassis.

NOTE ORIENTATION

SH M3x6

DETAIL

DETAIL

2. CENTRAL TRANSMISSION

1. 2. 3.

Tighten screws in order indicated. M3
nut must always be tightened fully.
When tightening the nut, use pliers.

IMPORTANT!

NOTE ORIENTATION

DETAIL

#303004
T4’18 BRASS MOTOR MOUNT PLATE

#302063
ALU ADJUSTMENT BALL-BEARING HUB (2)

OFFSET SPUR GEARS 48P

#305772 72T OPTION
#305776 76T OPTION
#305778 78T OPTION
#305779 79T OPTION
#305781 81T OPTION
#305784 84T INCLUDED

OFFSET SPUR GEARS 64P

#305860 90T OPTION
#305862 92T OPTION
#305866 96T OPTION
#305869 99T OPTION
#305870 100T OPTION
#305874 104T OPTION
#305876 106T OPTION
#305878 108T OPTION
#305880 110T OPTION
#305882 112T OPTION
#305884 114T OPTION

CUTAWAY VIEW

NOTE ORIENTATION
only when using XRAY OFFSET spur gears.

11

902306

SH M3x6

902306

SH M3x6

May be used when the front belt
becomes worn and loose. Belt
tensioner is NOT included in the kit
and must be purchased separately.

#303071
BELT TENSIONER SET

TO TIGHTEN FRONT BELT: Rotate both front nylon hubs in arrow direction B TO TIGHTEN REAR BELT: Rotate both rear nylon hubs in arrow direction B

FRONT BELT TENSION ADJUSTMENT

A

B

REAR BELT TENSION ADJUSTMENT

B

A

L=R

L=R

L=R L=R

A B

A

B

TO LOOSEN FRONT BELT: Rotate both front nylon hubs in arrow direction A TO LOOSEN REAR BELT: Rotate both rear nylon hubs in arrow direction A

LOWER DIFF POSITION

UPPER DIFF POSITION

LOWER DIFF POSITION

UPPER DIFF POSITION

Front diff LOWER position - tab in top notch

- provides more front traction, but makes

the car push more on power.

Recommended for low-traction tracks.

Recommended for low-medium traction tracks.

Front diff UPPER position - tab in bottom
notch - provides more steering, but less front

traction

Recommended for medium-high traction
tracks and technical tracks.

Recommended for medium-high traction tracks.

Rear diff LOWER position - tab in top notch - provides
more rear traction (mainly on-power), makes the
car more stable in chicanes, but makes the car

push on-power.

Rear diff UPPER position - tab in bottom notch ­provides more on-power steering, but makes the
rear slightly more loose.

INITIAL POSITION FOR CARPET

Place tab in this BOTTOM NOTCH

INITIAL POSITION FOR CARPET

Place tab in this BOTTOM NOTCH

INITIAL POSITION FOR ASPHALT

Place tab in this TOP NOTCH

INITIAL POSITION FOR ASPHALT

Place tab in this TOP NOTCH

DETAIL

2. CENTRAL TRANSMISSION