OFNA Racing 9.5 User Manual
RTR Instruction
Manual
OFNA Racing
22692 Granite Way, Ste. B
Laguna Hills, Ca. 92653
(949) 586-2910
Www.ofna.com
RTR KITS - REQUIRED FOR OPERATION
THINGS NEEDED
Glow Fuel
20%
AA Batteries ( 12 pcs )
You will need to buy a few items to start the engine and run the car.
• Use 20% nitro CAR fuel. Do not use airplane or heli fuels, they will
over heat engine.
• Buy LONG glow plugs, like OFNA/PICCO Plug (#51007). Use plugs
without idle bar. Do NOT use plugs, like the MC-59 or OS-8
In your box you will find..
• #10163 - Bottle, spout top
• #10218 - Red “C” size glow heater
You need to get batteries for the radio transmitter and the car receiver packs.
• Radio TX needs (8) eight AA batteries.
• Car needs (4) four AA Ni-cad batteries 2000Mah OFNA #10196 or (4) Alkaline.,
Alkaline type batteries will work, but braking will be reduced and 30 minute life. The
best for car, is to use a 5 cell hump receiver pack for increased voltage and longer
life..
Recommended Option:
You may want to upgrade the car battery pack to a Ni-Cad or NiHm 5 cell
type(600AE). This will give more run time. OFNA #10212 1000NiMh Hump Pack and
#10212 NiHm Hump Pack,
see charger 10214.
NiHm Battery Charger #10214
TOOLS NOT INCLUDED IN KIT,
BUT NEEDED TO MAINTAIN YOUR CAR.
Phillips Type Screw Drivers ( L )
Phillips Type Screw Drivers ( S )
10214
Over-nite
Charger
Instant Cement
Cutter
Curved Scissors
#91009 $5.95
Grease
Cross Wrench
#17109 $3.95
Needle Nose Pliers
Knife
Glow Plug & 17MM Cross Wrench
#10801 $6.95
MUST READ THIS BEFORE RUNNING
Running a nitro kit is fun and easy, but to make this a safe • Clean oil and dirt from chassis with a degreaser.
and good experience you must observe a few rules. This
kit is extremely fast, easily over 40MPH, and can seriously
injure someone if you are not careful.
Where to run car?
• Any running area you choose must be dry. Do not run
car near any water or wet dirt.
• Do not run on public streets. It is very easy to have the
car run over or damaged by hitting the curb.
• Do not operate car in tight confined places. The car is
very fast and will easily hit something.
• Do not run near people or animals.
and will too easily hit someone.
• Due noise, you will want to consider the surrounding
area when operating the car.
• Do not operate the car at night. You will not be able to
drive it without hitting something.
• Do not operate the car indoors. Engine exhaust is not
healthy.
Glow Fuel
• Glow fuel is poisonous!
• Glow fuel is flammable! label for additional precautions.
• Do not leave in fuel bottle with lid off at any time.
• Do not use any fuel other than glow fuel in this engine. • Car Fuel tank - Never store fuel in car tank, it will ruin the
First Time Starting the Engine
Caution! When starting engine make sure the following is
observed.
• Set engine Master needle to 3 turns (rich setting) • DAMAGE DUE CAR RUN AWAY IS NOT A WARRANTY
• Do not do this alone, get an experienced friend to help at
first.
• Fill fuel tank, try not to spill fuel. Do not spill fuel on
receiver
• Hold car off the ground, so it will not runaway when first
starts
• Turn on Radio and check the linkage before starting
engine.
• Turn on car receiver battery switch.
• Always have an air filter on the carburetor to keep dirt
out.
The car is very fast
Precautions
• This kit is not a toy. Always run car with a second
person as a spotter and pitman.
• Hot Parts - The pipe, manifold, engine and head are very
hot and will cause burns.
• Rotating Parts - Keep hands away from the drive train,
wheels, and engine when engine is running.
• Radio - Check batteries life before running the car. If
radio does not have full control of the car with steering
and/or throttle/brake do not run until corrected. Failure to
correct this will result in possible injury and damage to the
car or property.
• Glow fuel - Do leave the glow fuel unattended with the lid
off. Fuel contains Methanol and Nitro Methane and is
flammable and poisonous.
Store fuel in cool ventilated location. Refer the glow fuel
engine if left in tank.
• Always turn off the car BEFORE turning off radio.
ISSUE.
IF YOU DO NOT BREAK-IN ENGINE
CORRECTLY, MAINLY AT LOW RPM,
YOU WILL BREAK THE CONNECTING
ROD!
FAILURE TO NOT READ AND
Engine Break-in
• See Engine Page.
Emergency Stopping Engine When Running
• Remove air filter and cover carb. intake.
• Squeeze fuel line and hold until engine stops.
• With a rag, cover exhaust outlet.
Storing Car After Running
• Remove fuel from tank and fuel lines
• Turn off radio in car
• Put a few drops of after run in engine to keep it from
rusting.
FOLLOW BREAK-IN ENGINE
INSTRUCTIONS WILL VOID
WARRANTY!
CHECK RADIO SETTING,
LINKAGE AND SET FAIL SAFE
BEFORE STARTING.
NON-RTR OR PRO KITS - REQUIRED FOR OPERATION
THINGS NEED BESIDES THE KIT
3.5 cc (21 Class) ENGINE
REAR EXHAUST
OFNA/Picco
O-1 bp
#51217
Glow Fuel
20%
Bottle’s with spout
# 10160 - large 500cc
# 10161 - large 500 ccAuto Stop
# 10162 - small 250cc
# 10164 - CNC spout 500CC
# 10167 - CNC spout 800CC
Glow Plug Heat with Battery & Charger
# 10227....$$19.95
(please note OFNA Glow Heats available)
Note: Pro kit does not include engine!
RADIO CONTROL UNIT
Note: Carefully read the instruction manual of your
2 channel radio controller before using.
SUITABLE SERVO SIZE
36mm-41mm
15mm - 21mm
29mm - 42mm
Off-Road Starter Box, 12V motor
# 10250 - 1/8 scale Starter Box
# 10253 - 1/8 scale Starter Box w/ Panel
Off-Road Starter Box, two 550 motors
# 10248 - 1/8 scale Starter Box
# 10249 - 1/8 scale Starter Box,RTR
Optional Parts
# 92571 - Power Panel Glow Heater
# 92572 - Cable for Glow Plug
Radio must be set at neutral position
before installing in the kit.
SEQUENCE TO SET NEUTRAL
Install AA batteries in Radio.
Extend the antenna.(Transmitter)
Install batteries into Car receiver .
After installing the battery, connect the
battery box.
Extend the antenna. (Receiver)
Set the trim-lever at center.
Turn on the switch. (Transmitter)
Turn on the switch. (Receiver)
Make sure the servos are in command.
When the operation stick is in neutral,
servo horns must be in neutral as will.
*Adjustment can be made by re installing the servo horn.
Turn off the switch. (Receiver)
1111
Turn off the switch. (Transmitter)
12
Retract the antenna. (Transmitter)
13
12V Battery for Starter Box
(must have)
AA Batteries ( 12 pcs ) for radio
More Optional Parts . . .
#10211 NiHm Battery Flat
Pack .. $29.95
# 10214 NiHm Battery Pack
Charger.. $7.95
# 51007 OFNA/Picoo Glow
Plug .. $4.95
TOOLS NOT INCLUDED IN KIT
Phillips Type Screw Drivers ( L )
Phillips Type Screw Drivers ( S )
Needle Nose Pliers
Knife
Cutter
Curved Scissors
Brush
Glow Plug & 17MM Cross Wrench
#10801 $6.95
Cross Wrench
#17109 $3.95
Instant Cement
Masking Tape
Paints
Grease
7mm and 5.5mm
Hex Wrench
INCLUDED WITH KIT
Shock Oil
Grease Box
5mm
Hex Wrench
3mm
Hex Wrench
2.5mm
Hex Wrench
1.5mm
Hex Wrench
40017
GEAR BOX PLASTIC PARTS
40015
ARM HOLDER PLASTIC PARTS
PLASTIC PARTS
40003
DIFF. CASE
PLASTIC PARTS
2
36901
Front Knuckles, Pivot Ball
31304
Rear Hub,
Pivot Ball
1
40202
Front and Rear Lower Arms.
40027
WING SUPPORT PLASTIC PARTS
3
40094
Front Upper
MBX Arm
40013 & 40048
FRONT BUMPER & BATTERY HOLDER
PLASTIC PARTS
40031
SERVO SAVER PLASTIC PARTS
40040
CENTER DIFF. MOUNT PLASTIC PARTS
PLASTIC PARTS
40047
RECEIVER BOX PLASTIC PARTS
40018/40029
CHASSIS BRACE PLASTIC PARTS
40056
SHOCK ABSORBER PLASTIC PARTS
40046
STONE GUARD PLASTIC PARTS
ASSEMBLY OF THE THROTTLE LINKAGE SYSTEM
#30800
Plastic Throttle
kit
Throttle
Spring
Plastic Collar
* Take the plastic collar
from brake system plastic
parts.
3X3mm
Set Screw
#30530
2mm Rod
3X3mm
Set Screw
Plastic Throttle
Ball Joint
* Snap On.
#10300
Alum.Stopper
Note:
Battery life is short when using Alkaline batteries. For safety, we recommend using
Alkaline batteries for only 30 minutes before testing.. Battery strength affects braking
power and radio range. If voltage drops while running the car, you will loose control and
destroy your car! This is NOT covered under warranty.
To increase run time, upgrade receiver battery to a 5-cell hump pack. But, the most
important step you can make, “is to always use fully charged or fresh batteries when
running your car”. Another choice is to use OFNA #10196 2000 mAh NiMh AA batteries in
car and radio.
Brake
Idle Position
Full Throttle
3X3mm
Set Screw
#10300
Alum.Stopper
Fuel
Tube
( 6mm )
* Align throttle servo same
as shown.
CHECKING ENGINE THROTTLE
A
1. Insert AA batteries into
transmitter (8 Pcs).
2.Turn on transmitter.
3.Turn on receiver.
4.Center throttle trims as
shown .
IMPORTANT
CHECK RADIO THROTTLE
AND STEERING SWITCHES
BEFORE RUNNING CAR
* Insert into transmitter.
1. Pull Full Throttle.
B
C
1. Push trigger to full
brake position.
2. Adjust alum. Stopper to
increase or decrease
the brake.
B
A
* Align throttle servo same
as shown.
Brake (C)
A
Idle Position (A)
Full Throttle (B)
• Full throttle arm position.
Spring rod pulls throttle
barrel open and brake
rods release pressure on
brake cams.
C
C
B
• Full brake arm position.
Spring compresses
forward and brake rods
pull brake levers.
ASSEMBLY OF THE DIFFERENTIAL GEAR
4x4mm
40006
Cap Joint
Set Screw
40010
2.5x13.8mm
Pin
40003
Diff. Case
30779
4 x 10mm
washer
40004
Diff. Gear
(Small)
30773
4mm
Cross pin
40004
Diff. Gear
(Small)
30779
4 x 10mm
washer
36053
8x16mm
Ball bearing
(Builds one differential for Center)
40005
Break
Cap Joint
36053
8x16mm
Ball bearing
OPTION: #49001 HD STEEL GEAR SET,
INSIDE DIFF.
4x4mm
Set Screw
40003
Diff. Case
40010
2.5x13.8mm
Pin
ASSEMBLY OF THE DIFFERENTIAL CASE
40010
2.5x13.8mm
Pin
40004
Diff. Gear
(Large)
40012
6x15mm
Washer
*Use 6x15mm washer
to adjust the gear mesh.
( Builds two differentials for front and rear.)
40009
P6
O-Ring
40002
41T Large
Bevel Gear
40009
P6 O-Ring
40004
Diff. Gear
(Large)
40009
P6
O-Ring
36053
8x16mm
Ball bearing
40012
6x15mm
Washer
40012
6x15mm
Washer
40004
Diff. Gear
(Large)
40006
Cap Joint
30779
4 x 10mm
washer
40004
Diff. Gear
(Small)
40011
Diff. Gasket
30773
4mm
Cross pin
OPTION:
49032
43T Large
Bevel Gear
(must use 13t pinion)
40002
41T Large
Bevel Gear
40004
Diff. Gear
(Small)
30779
4 x 10mm
washer
Note: It is very important to add
or remove the #30779 washer if
the gear mesh is too tight or
too lose.
* Apply diff. gear grease to the
differential during assembly.
* Fill the diff. the case to
approx 70% with grease.
40010
2.5x13.8mm
Pin
40004
Diff. Gear
(Large)
*Use 6x15mm washer
to adjust the gear mesh.
OPTION:
#49016 SPUR GEAR 50T
#49031 SPUR GEAR 50T, HD SPECIAL
(Builds one differential for Center)
40012
6x15mm
Washer
40009
P6
O-Ring
40001
47T
Spur Gear
36053
8x16mm
Ball bearing
40005
Break
Cap Joint
40011
Diff. Gasket
40001
47T
Spur Gear
3x12mm
Flat Head
Tapping Screw
3x12mm
Flat Head
Tapping Screw
ASSEMBLY OF THE FRONT GEAR BOX
36053
8X16mm
Ball bearing
36053
8X16mm
Ball bearing....4
40024
13x16x0.2mm
Shim..............2
40024
13x16x0.2mm
Shim
40017
Gear Box
36053
8X16mm
Ball bearing
40021
14TSmall
Bevel Gear
OPTION: #49012 PINION GEAR
13TOOTH
40017
Gear Box
40021
14T Small
Bevel Gear..............1
ASSEMBLY OF THE FRONT ARMS HOLDER
4x15mm
Tapping Screw
(Small Head)
MISC. SCREW BAG
40067
4x15mm
Tapping Screw........................2
90026
5x5mm
Set Screw......1
40022
Front Lower Arm
Holder (Front)
Use shims to adjust gear
mesh.
4x45mm
Tapping Screw
(Small Head)
40015
Front Lower arm
Holder (Rear/Plastic)
ment
Screw
Ce
90026
5x5mm
Set Screw
36730
Cap Joint
4x16mm
Flat Head
Tapping Screw
36730
Cap Joint................................1
4 x 16mm
Flat Head
Tapping Screw.......................4
4x45mm
Tapping Screw........................2
40015
Front Upper arm
Holder (Rear/Plastic)
OPTION: #49002 CNC 7075
FRONT LOWER ARM HOLDER
4x16mm
Flat Head
Tapping Screw
ASSEMBLY OF THE FRONT SHOCK TOWER
35314
4mm
Nylon Nut
36901
ASSEMBLY OF THE FRONT PIVOT
BALL KNUCKLE ARM
Ball Type
Knuckle Arms
( Right and Left Side)
49037
Front
Shock Tower, Orange
40067
M4x15
TP Screw
40067
M3x12
TP Screw
* Adjust alum. nut to
keep steering ball
smooth.
OPT: 49003
CNC 7075 Alum. Shock Tower
Assembly of the right and left hand side
are the same.
* Use 5mm
hex wrench.
36904
14mm
Alum. Nut
36903
14mm
Steering Ball
36905
Steering Ball
Washer
ASSEMBLY OF THE FRONT KNUCKLE ARM
INTO FRONT ARMS
4X10mm
set screw
36055
2.5x17mm
Pin
* Note the "R" mark
is for righthand side.
36053
8x16mm
Ball Bearing
40094
Front Upper
MBX Arm
36870
4x4mm
Set Screw
36052
CVD
Universal Joint
36053
8x16mm
Ball Bearing
Assembly of the right and left hand side
are the same.
* A 4x10mm set screw is used
to adjust the ride-height.
40245
Orange
Wheel Hub
( Alum.)
* Use a 2.5mm
hex wrench.
40202
Front Lower
MBX Arm
3mm
3.5mm
ASSEMBLY OF THE FRONT SUSPENSION ARMS
40023
Lower Arm Shaft (4mm)
90021
3mm
E-Ring
Assembly of the right and left hand side
are the same.
90021
3mm
E-Ring
90020
2.5mm
E-Ring
* Insert the drive shaft into the
cap joint before assembly.
36170
3mm
Arm Shaft
90020
2.5mm
E-Ring
ASSEMBLY OF THE REAR GEAR BOX
36053
8X16mm
Ball bearing
36053
8X16mm
Ball bearing....4
40015
Rear arm Holder
4X16mm
Tapping Screw
(Small Head)
40017
Gear Box
36053
8X16mm
Ball bearing
40024
13x16x0.2mm
Shim
4X45mm
Flat Head
Tapping Screw
40021
14T Pinion
Gear
* Adjust the backlash
with the shims.
OPTION: #49012 PINION GEAR
13TOOTH
90026
5x5mm
Set Screw
w
re
Sc
Cement
36730
Cap Joint
40017
Gear Box
40024
13x16x0.2mm
Shim..............2
40021
14T Pinion
Bevel Gear..............1
36730
Cap Joint.................1
4 x 15mm
Tapping Screw
( Small Head )..........6
90026
5 x 5mm
Set Screw..............1
35314
4mm
Nylon Nut..............2
4 x 20mm
Flat Head
Tapping Screw..........2
40068
Misc. Hardware
Bag, 9.5 RTR
4X10mm
Tapping Screw
(Small Head)
40027
Wing Stay
Mount
35314
4mm
Nylon Nut
40025
Rear
Lower Arm Holder
( 0 Degree)
4X15mm
Tapping Screw
(Small Head)
OPTION: #49007 REAR LOWER
ANTI-SQUAT HOLDERS - 1.5; 2.0;
3.0 DEGREES.
1.5
2
3
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