Xray GTX8 2022 User manual

2
BEFORE YOU START
This is a high-competition, high-quality RC 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 XRAY, 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 this
is not what you wanted or expected, do not continue any further. Your hobby
dealer can not accept your 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
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
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 Výstavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: [phone]
Fax: [phone]
Email: [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]
Email: [email protected]
IMPORTANT NOTES – NITRO ENGINES
• Always test the brakes and the throttle before starting your engine to avoid
losing control of the model.
• Make sure the air filter is clean and oiled.
• Never run your engine without an air filter. Your engine can be seriously
damaged if dirt and debris get inside the engine.
• For proper engine break-in, please refer to the manual that came with the
engine.
• Do not run near open flames or smoke while running your model or while
handling fuel.
• Some parts will be hot after operation. Do not touch the exhaust or the engine
until they have cooled. These parts may reach 275°F during operation!

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 R/C 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 short-
circuits, 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.
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 newly-
purchased 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.
IMPORTANT NOTES – NITRO FUEL
• Handle fuel only outdoors. Never handle nitro fuel indoors, or mix nitro fuel in
a place where ventilation is bad.
• Only use nitro fuel for R/C models. Do not use gasoline or kerosene in R/C
models as it may cause a fire or explosion, and ruin your engine.
• Nitro fuel is highly inflammable, explosive, and poisonous. Never use fuel
indoors or in places with open fires and sources of heat.
• Always keep the fuel container cap tightly shut.
• Always read the warning label on the fuel container for safety information.
• Nitro-powered model engines emit poisonous vapors and gasses. These vapors
irritate eyes and can be highly dangerous to your health. We recommend wearing
rubber or vinyl gloves to avoid direct contact with nitro fuel.
• Nitro fuel for RC model cars is made of the combination of the methyl alcohol,
castor or synthetic oil, nitro methane etc. The flammability and volatility of these
elements is very high, so be very careful during handling and storage of nitro
fuel.
• Keep nitro fuel away from open flame, sources of heat, direct sunlight, high
temperatures, or near batteries.
• Store fuel in a cool, dry, dark, well-ventilated place, away from heating devices,
open flames, direct sunlight, or batteries. Keep nitro fuel away from children.
• Do not leave the fuel in the carburetor or fuel tank when the model is not in use.
There is danger that the fuel may leak out.
• Wipe up any spilled fuel with a cloth.
• Be aware of spilled or leaking fuel. Fuel leaks can cause fires or explosions.
• Do not dispose of fuel or empty fuel containers in a fire. There is danger of
explosion.

4
TOOLS REQUIRED
Allen 1.5mm (#111545 - HUDY EXCLUSIVE Limited Edition)
Allen 2.0mm (#112045 - HUDY EXCLUSIVE Limited Edition)
Allen 3.0mm (#113045 - HUDY EXCLUSIVE Limited Edition)
Socket 5.0mm (#175035 - HUDY EXCLUSIVE Limited Edition)
Socket 5.5mm (#175535 - HUDY EXCLUSIVE Limited Edition)
Phillips Screwdriver 5mm (#165045 - HUDY EXCLUSIVE Limited Edition)
Caster Clip Remover (#107612 - HUDY EXCLUSIVE Limited Edition)
Arm Reamer 4.0mm (#107644 - HUDY EXCLUSIVE Limited Edition)
Arm Reamer 3.0mm (#107643 - HUDY EXCLUSIVE Limited Edition)
Reamer (#107602 - HUDY EXCLUSIVE Limited Edition)
Cross Wrench 3mm (HUDY #107581)
Special Tool for turnbuckles, nuts (HUDY #181090)
Pocket Hobby Knife (HUDY #188981)
Scissors (HUDY #188990)
Side Cutters
(HUDY #189010)
Combination Pliers
(HUDY #189020)
Professional Multi-Tool
(HUDY #183011)
Turnbuckle Wrench 4mm
(HUDY #181040)
Turnbuckle Wrench 5mm
(HUDY #181050)
Ball Allen Wrench 2.5mm (#132545 - HUDY EXCLUSIVE Limited Edition)
Allen Wrench 2.5mm (#112545 - HUDY EXCLUSIVE Limited Edition)
Flywheel/Wheel Nut Multi-Tool (HUDY #182015)
Wheel Nut Tool 17mm (HUDY #107570)
Turnbuckle Wrench 3mm
(HUDY #181030)
Tweezers
EQUIPMENT REQUIRED
Receiver Pack
Engine
(FX G501 #670101)
Manifold & Exhaust
(FX #679500)
Glow Plug IgniterStarter Box & Battery Pack
(HUDY #104500)
Steering and Throttle Servos
Battery Charger
Lexan™ Paint Fuel + Fuel Bottle
(HUDY #104200)
Wheels & Tires
GT BODY
(XRAY #359730)
Double-sided Tape
(HUDY #107875)
Transmitter & Receiver
Bearing Oil
(HUDY #106230)
TL
CA
CA glueThreadlock

5
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.
EQUIPMENT INCLUDED
(HUDY #106210)
Premium Graphite Grease
OILOILOIL
* Kit includes smaller but sufficient amount of oil and grease to build the car.
50.000cSt (#106551)
HUDY Premium Silicone Oils
300.000cSt (#106631)
HUDY Premium Silicone Oils
800cSt (#106381)
HUDY Premium Silicone Oils
GTX TECH TIPS
TO CLOSE A WIDE GAP TO OPEN A NARROW GAP
If there is too much or too little diff side play, this may create non-optimal gear mesh between the diff gear and the pinion drive gear. This
is easily resolved by inserting 1 or 2 of the included thin shims behind a diff outdrive ball-bearing, depending on how much play there is.
FRONT & REAR DIFF GEAR MESH ADJUSTMENT
THE LOCATION OF THE SHIM(S) DEPENDS ON WHETHER YOU ARE TRYING TO CLOSE OR OPEN THE GAP:
TIP
To CLOSE a wide gap:
add 1 or 2 shims
against diff spur gear
To OPEN a narrow gap:
add 1 or 2 shims on the
other side of the diff, away
from spur gear
insert shim(s) here
OPEN A NARROW GAP
#962130 S 13 x 16 x 0.2 mm (10) #962130 S 13x16x0.2mm (10)
#962131 S 13 x 16 x 0.1 mm (10) #962131 S 13x16x0.1mm (10)
WASHER WASHER
insert shim(s) here
CLOSE A WIDE GAP
DRIVE SHAFT PIN SERVICING
TIP
To enjoy the longest possible lifespan of the drive shafts and diff outdrives, it is extremely important to properly service the drive shaft pins.
Inspect the pins after every 3 hours of runtime. If the pins show any wear, replace them with new pins.
For easy drive pin replacements use #106000
HUDY Drive Pin Replacement Tool.
To replace the worn pins use only
premium HUDY drive pins #106050.
Do not use drive shafts
when the pins are worn.
Press out the worn pins. Press in new pins and
regularly inspect for wear.
SUSPENSION & DRIVETRAIN MAINTENANCE
• Check suspension for free movement during building and operation, and especially after running
and if you have crashed the car. If the suspension does not move freely, use the appropriate HUDY
Arm Reamer to clean and resize the holes of the suspension arms.
• Regularly check the drive shaft pins (both side and center) and if they show any wear must be
immediately replaced by new pins. If the car is run with worn pins, excessive wear on the diff
outdrives will result. The 106000 HUDY Drive Pin Replacement Tool (for 3mm Pins) is a compact,
rugged multi-use tool set for replacing 3mm drive pins in drive shafts. Use the HUDY replacement
drive shaft pins 3x14 (#106050).
• Regularly inspect and replace the connecting pins which connect the center drive shafts with the
pinion gear, and also the pins that connect the wheel drive shafts with wheel axles. Use HUDY
Graphite Grease to lubricate the drive shaft connecting joints and the diff gears.
• Pivot balls and ball-joints will naturally wear for some time and will generate play. If there is too
much play the pivot balls and ball joints need to be replaced.
• If the car is run in wet conditions, apply WD-40® on all drivetrain parts before the run. After the
run, clean and dry the parts again.
HUDY SPRING STEEL™
The HUDY Spring Steel™ used in the car is the strongest and most durable steel material on the RC market. While items made from HUDY Spring Steel™ are still subject to wear, the lifespan is considerably
longer than any other material. As parts made from HUDY Spring Steel™ wear, the brown color will after some time “go down” but it will not affect the strength of the material. The brown color is only a
surface treatment and if the brown color will wear the durability of the part will be still strong.
CHECK GEAR MESH AND DIFF PLAY ONLY AFTER THE ENTIRE GEARBOX IS MOUNTED TOGETHER WITH THE SUSPENSION HOLDERS ON THE CHASSIS.
ALL PARTS ARE DESIGNED TO HAVE CERTAIN PLAY AND IT IS ALL DESIGNED BY PURPOSE.

6
DIFFERENTIAL GEARS
STEP DETAIL
➎
➎➏
➏
DETAIL
➊
➋
➌
➍
➎
➏
1. DIFFERENTIALS
2x
F=R
355005 DIFFERENTIAL 46T - V2 - SET
355022 DIFFERENTIAL CASE - V2
355031 STEEL DIFF BEVEL & SATELLITE GEARS - V2 (2+4)
355046 FRONT/REAR DIFF LARGE BEVEL GEAR 46T - HUDY STEEL
355065 DIFF OUTDRIVE ADAPTER - V2 - HUDY SPRING STEEL™ (2)
355084 F/R DIFF PIN (2)
355091 F/R DIFF GASKET (4)
BAG
940817
903312
355046
964060
355031
355031
971061 355022
940817
355091
964030
980261
980261
971061
355084
355065
355065
940817
BB 8x16x5
964060
S 6x18x0.2
971061
O 6x1.55
980212
P 2x11.6
BOOK
SET-UP
903312 HEX SCREW SFH M3x12 (10)
940817 BALL-BEARING 8x16x5 RUBBER SEALED - OIL (2)
964030 WASHER S 3.5x12x0.2 (10)
964060 WASHER S 6x18x0.2 (10)
971061 SILICONE O-RING 6x1.55 (10)
980261 PIN 2.5x11.5 (10)
#355022-G
DIFFERENTIAL CASE - V2 - GRAPHITE
#355086
HEAT RESISTANT F/R ALU DIFF PIN
+ INSERTS (SET)
XRAY BALL-BEARING
#930816 8x16x5 GREASE STEEL OPTION
#930817 8x16x5 OIL STEEL OPTION
#940816 8x16x5 GREASE RUBBER OPTION
#940817 8x16x5 OIL RUBBER INCLUDED
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)
Ball-bearing with RUBBER covers.
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
XRAY BALL-BEARING
#930816 8x16x5 GREASE STEEL OPTION
#930817 8x16x5 OIL STEEL OPTION
#940816 8x16x5 GREASE RUBBER OPTION
#940817 8x16x5 OIL RUBBER INCLUDED
# 355064
FRONT DIFF. OUTDRIVE ADAPTER
LONG - V2 - HSS™ (2)

7
DIFFERENTIAL OIL
➎
STEP DETAIL
DETAIL
➊
➋
➌
➍
➎
➏
1. DIFFERENTIALS
964030
S 3.5x12x0.2
903312
SFH M3x12
2x
Front diff 300.000cSt
Rear diff 50.000cSt
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)
F=R
BOOK
SET-UP
Fill the differentials
with oil just above the
satellite gears.
IMPORTANT!
VERY IMPORTANT!
OIL
INCORRECT
CORRECT
Do not overfill the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.
Use the following silicone oils included in the kit for initial settings:
FRONT diff: 300.000cSt / REAR diff: 50.000cSt
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
To ensure you have the same amount of oil from rebuild to rebuild, do the following:
1. Put the diff (without oil) on the scale and check the weight:
- FRONT DIFF approx. 39.10g
- REAR DIFF approx. 39.10g
2. Slowly pour oil into the diff and watch the weight.
The approximate weight of the diff+oil is REAR
DIFF approx. 41.10g and FRONT DIFF approx.
41.10g
REAR REAR
FRONT gg
g
g
FRONT
39.10g + 2.0g = 41.10g
39.10g + 2.0g = 41.10g
OIL
FRONT DIFF
REAR DIFF
39.10
39.10 41. 10
41. 10
940817
BB 8x16x5
964060
S 6x18x0.2
980212
P 2x11.6
OILOIL
Rear diff:
Silicone oil 50.000cSt
Fill just above the satellite
gears.
Front diff:
Silicone oil 300.000cSt
Fill just above the satellite
gears.
After assembly the differentials should
have a length of 32.3~32.5 mm
measured from the ends of the installed
ball-bearings. If differentials are
longer, retighten the 4 screws holding
the crown gears.
32.3~32.5 mm
➊
➋
➌
➍
Tighten the screws equally. Finish tightening in this order.
971061
O 6x1.55
Ball-bearing with RUBBER covers.
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

8
2. FRONT & REAR TRANSMISSION
930816
BB 8x16x5
901505
SB M5x5
2x
352007 DIFF BULKHEAD BLOCK WITH AIR COOLING SET FRONT/REAR
352042 GRAPHITE FRONT SHOCK TOWER 4MM
353041 GRAPHITE REAR SHOCK TOWER 4MM
355115 BEVEL DRIVE GEAR 13T
355415 CENTRAL DOGBONE SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™ (2)
901505 HEX SCREW SB M5x5 (10)
908312 HEX SCREW SOCKET HEAD CAP SCH M3x12 (10)
908380 HEX SCREW SOCKET HEAD CAP M3.5x30 - STAINLESS (10)
930816 BALL-BEARING 8x16x5 STEEL SEALED - GREASE (2)
355005 DIFFERENTIAL 46T - V2 - SET
BAG
355005
FRONT DIFF
355005
REAR DIFF
352007
352007
352007
355115
355115
352007
908312
908312
908312
352042
353041
908380
908380
908312
901505
901505
930816
930816
930816
930816
355415
355415
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
XRAY BALL-BEARING
#930816 8x16x5 GREASE STEEL INCLUDED
#930817 8x16x5 OIL STEEL OPTION
XRAY BALL-BEARING
#930816 8x16x5 GREASE STEEL INCLUDED
#930817 8x16x5 OIL STEEL OPTION
Ball-bearing with STEEL covers
Apply a drop of bearing oil after every 2-3 hours
of driving to increase the life time. Dry bearing
can overheat and damage the bulkhead.
DETAIL

9
2. FRONT & REAR TRANSMISSION
Cut on both front
and rear bulkhead blocks
908312
SCH M3x12
908380
SCH M3.5x30
During assembly, there is no need to check gear mesh or diff play. In particular, do not check gear mesh and diff
play when the differential is installed only in the gear box without the suspension holders and without being
mounted to the chassis. All parts have specifically designed play, and only when the car is fully assembled will
it have the proper amount of play where necessary. Only once you build the entire car, then you can check for
free movement of all rotational parts and drivetrain as well a free non-binding operation of suspension parts.
REAR DIFF 50.000cSt
FRONT DIFF 300.000cSt
NOTE DIFF ORIENTATION
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)

10
2. FRONT & REAR TRANSMISSION
908312
SCH M3x12
908312
SCH M3x12
SHOCK TOWER
SHOCK TOWER

11
BAG
351135
3. REAR SUSPENSION
333450 ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
351234 ALU REAR DIFF BULKHEAD BLOCK PLATE
352007 DIFF BULKHEAD BLOCK WITH AIR COOLING SET FRONT/REAR
352314 COMPOSITE ECCENTRIC BUSHINGS - V2 (2)
352460 PIVOT BALL 5.8 (10)
352470 BALL JOINT 5.8 (8)
353116 COMPOSITE REAR LOWER SUSPENSION ARM - HARD
353330 ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-C.
353331 ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-C.
353371 SET OF COMPOSITE LOWER ARM SHIMS
353428 REAR ANTI-ROLL BAR 2.8MM
357212 LOWER INNER PIVOT PIN F+R (2)
901303 HEX SCREW SB M3x3 (10)
901305 HEX SCREW SB M3x5 (10)
901312 HEX SCREW SB M3x12 (10)
901412 HEX SCREW SB M4x12 (10)
902318 HEX SCREW SH M3x18 (10)
903308 HEX SCREW SFH M3x8 (10))
903310 HEX SCREW SFH M3x10 (10))
903410 HEX SCREW SFH M4x10 (10))
903420 HEX SCREW SFH M4x20 (10))
351135 GTX'22 ALU CHASSIS - SWISS 7075 T6 (3MM)
#333451
ALU ANTI-ROLL BAR PIVOT BALL 5.8 MM
- SWISS 7075 T6 - HARDCOATED (2)
REAR SUSPENSION ARMS
#353115 MEDIUM OPTION
#353116 HARD INCLUDED
#353116-XH X-HARD OPTION
#353116-G GRAPHITE OPTION
REAR ANTI-ROLL BARS
#353418 ø1.8mm OPTION
#353420 ø2.0mm OPTION
#353422 ø2.2mm OPTION
#353424 ø2.4mm OPTION
#353425 ø2.5mm OPTION
#353426 ø2.6mm OPTION
#353428 ø2.8mm INCLUDED
#353430 ø3.0mm OPTION
#353432 ø3.2mm OPTION
901305
903308
901303
902318
333450
357212
903420
903410
903310
352314
352007
353371
353371
352314
353116
353331
353330
351234
901412
353428
352470
901312
352460
353116

12
3. REAR SUSPENSION
901412
SB M4x12
353371
SHIM 4x10x2
The new XRAY rear alu lower suspension holders provide even greater range of adjustment for the rear
suspension. Using different combinations of eccentric bushings, fine adjustment of rear anti-squat, rear
toe-in, rear roll center, and rear track-width can be obtained. For more information about the influence
of rear anti-squat, rear toe-in, rear roll center and rear track width on car handling, please refer to
HUDY Off-Road Set-up Book (#209099).
The tables describe the amounts of rear anti-squat, rear toe-in, rear track-width change depending
on the combinations of eccentric bushings used with 0 and 1mm, 1° off set. The 0.5mm, 0.5° represent
the half change.
ANTI-SQUAT
ROLL CENTER TRACK-WIDTH
TOE-IN
RR
RR RR
RRRF
RF RF
RF(°)
(mm) (mm)
(°)
=1°
=2°
=0°
=2°
=1°
=3°
=0°
=1°
=-1°
=0mm
=1mm
=-1mm
=308
=306
=310
=3°
=4°
=2°
=2°
=3°
=1°
=4°
=5°
=3°
RR
0.5°
1°
INITIAL SETTING
2mm
2mm
RR
RF
INITIAL SETTING
RF
0.5°
1°
(HUDY #107634)
ARM REAMER
If the suspension arm does not move
freely use a HUDY Arm Reamer to
resize the holes of the arms.
DETAIL
NOTE ARMS ORIENTATION
4.2mm
DOWNSTOP SETTING
DETAIL
903410
SFH M4x10

13
ANTI-ROLL BAR
BOOK
SET-UP
901312
SB M3x12
901303
SB M3x3
901305
SB M3x5
902318
SH M3x18
903308
SFH M3x8
903310
SFH M3x10
903420
SFH M4x20
1.5mm
6mm
DETAIL
0mm
L=R
DETAIL
3x5mm
3x8mm
3x3mm
3x3mm
3x18mm
Step check for free movement.
➊
DETAIL
Loosen the 3x5 setscrew if the
anti-roll bar does not turn freely.
3x10mm
4x20mm
Check for free movement.
DETAIL
Push the arm from both sides to create play.
DETAIL
NOTE
ORIENTATION
3. REAR SUSPENSION
L=R
2x
Install the pivot balls with Professional
Multi Tool (HUDY #183011).
INITIAL SETTING
DETAIL
L=R

14
901504
SB M5x4
➊
➋
➌
➍
➑
➐
➏
➍
➎Graphite Grease
(HUDY #106210)
3x17mm
2.5x13mm
8x16x5mm
13x19x4mm
Follow the TECH TIP on page
5 for drive shaft pin servicing
Use HUDY Ball-Bearing
Grease or Oil for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
L=R
To tighten the setscrew you can
also use the HUDY 17mm Wheel
Nut Tool #107570.
2.5mm
980317
P 3x17
980263
P 2.5x13
940817
BB 8x16x5
941319
BB 13x19x4
4. REAR SUSPENSION
352625 ADJ. TURNBUCKLE M5 L/R 46MM - HUDY SPRING STEEL™ (2)
353020 COMPOSITE REAR BRACE HOLDER
353131 REAR UPPER INNER CAMBER LINK BALL JOINT - V3 (2)
353160 MOUNTING BALL 6.8 (4)
353170 PIVOT BALL 6.8 (4)
353354-H COMPOSITE REAR UPRIGHT LB - HARD
353370 SET OF COMPOSITE REAR HUB CARRIER SHIMS
353391 GRAPHITE REAR ROLL CENTER UPRIGHT PLATE 4MM (2)
353523 GT COMPOSITE REAR HOLDER POST (2)
355211 CVD DRIVE AXLE - HUDY SPRING STEEL™
355223 CVD UNIVERSAL DRIVE SHAFT 93MM - HUDY SPRING STEEL™
355237 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
355252 ALU WHEEL AXLE OFFSET +2MM - BLACK COATED (2)
BAG
357331 REAR LOWER OUTER PIVOT PIN SCREW 3MM (2)
901504 HEX SCREW SB M5x4 (10)
902314 HEX SCREW SH M3x14 (10)
902318 HEX SCREW SH M3x18 (10)
903312 HEX SCREW SFH M3x12 (10)
903320 HEX SCREW SFH M3x20 (10)
940817 BALL-BEARING 8x16x5 RUBBER SEALED - OIL (2)
941319 BALL-BEARING 13x19x4 RUBBER SEALED - OIL (2)
960030 NUT M3 (10)
980263 PIN 2.5x13 (10)
980317 PIN 3x17 (10)
OFFSET WHEEL AXLES
#355250 0mm OPTION
#355251 +1mm OPTION
#355252 +2mm INCLUDED
357331
902318 903312
353160
353131
960030
902318
980263
355223
353170
960030
353370
353354-H
980317
960030 353020
353523
902318
960030
352625
355211
941319
353391 903320
353131
960030
902314
355237
353370
940817
355252
901504
2x
L=R
XRAY BALL-BEARING
#930816 8x16x5 GREASE STEEL OPTION
#940816 8x16x5 GREASE RUBBER OPTION
#931318 13x19x4 GREASE STEEL OPTION
#941318 13x19x4 GREASE RUBBER OPTION
#930817 8x16x5 OIL STEEL OPTION
#940817 8x16x5 OIL RUBBER INCLUDED
#931319 13x19x4 OIL STEEL OPTION
#941319 13x19x4 OIL RUBBER INCLUDED
Ball-bearing with
RUBBER covers
OFFSET WHEEL AXLES
#355250 0mm OPTION
#355251 +1mm OPTION
#355252 +2mm INCLUDED
REAR UPRIGHTS
#353354 MEDIUM OPTION
#353354-H HARD INCLUDED
#353354-G GRAPHITE OPTION
REAR UPRIGHTS
#353354 MEDIUM OPTION
#353354-H HARD INCLUDED
#353354-G GRAPHITE OPTION

15
4. REAR SUSPENSION
353370
SHIM 3x9x1
353370
SHIM 3x9x2
960030
N M3
Ensure that the rear upright moves freely.
If it does not move freely, use sandpaper
to thin both wheelbase adjustment shims.
Shims for wheelbase
adjustment
Do not overtighten the self-locking nut.
Overtightening may result in suspension binding.
ARM REAMER
Check for free
movement.
DETAIL
INITIAL SETTING
DETAIL
CAMBER
2x
L=R
RIGHT
THREAD
LEFT
THREAD
OIL
OIL
RIGHT THREAD RIGHT THREAD LEFT THREAD LEFT THREAD
20mm 20mm
NOTE ORIENTATION
NOTE
ORIENTATION
BOOK
SET-UP
DETAIL
Use tools to tighten as shown.
Special Tool for all turnbuckles & nuts (HUDY #181090)
or Turnbuckle Wrench 5mm (HUDY #181050).
Install the pivot balls with Professional
Multi Tool (HUDY #183011).
L=R
2x
2mm
1mm 1mm
(HUDY #107633)
If the suspension arm does not
move freely use a HUDY Arm
Reamer to resize the holes of
the arms.

16
4. REAR SUSPENSION
960030
N M3
903312
SFH M3x12
903320
SFH M3x20
902318
SH M3x18
2x
L=R
902314
SH M3x14
960030
N M3
2x
L=R
DETAIL
INITIAL SETTING
L=R
INITIAL
SETTING
DETAIL
L=R
Install the nut with Multi Tool (HUDY #181090).
3x18mm
3x20mm
3x14mm
902318
SH M3x18
DETAIL
INITIAL SETTING
L=R

17
902318
352121
901303
901312
901305
903308
352314
903408
903410
903306
903414
351231
901410
352326
357212
353371
333450
352470
352495
352460
352470
352007
352325
FRONT ANTI-ROLL BARS
#352489 1.8mm OPTION
#352490 2.0mm OPTION
#352492 2.2mm OPTION
#352493 2.3mm OPTION
#352494 2.4mm OPTION
#352495 2.5mm INCLUDED
#352496 2.6mm OPTION
#352498 2.8mm OPTION
333450 ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
351231 ALU FRONT DIFF BULKHEAD BLOCK PLATE
352007 DIFF BULKHEAD BLOCK WITH AIR COOLING SET FRONT/REAR
352121 C-HUB COMPOSITE FRONT LOWER SUSPENSION ARM - MEDIUM
352314 COMPOSITE SQUARE ADJ. ROLL CENTER BUSHINGS - V2 (2)
352325 ALU FRONT LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-C.
352326 ALU FRONT LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-C.
352460 PIVOT BALL 5.8 (10)
352470 BALL JOINT 5.8 (8)
352495 FRONT ANTI-ROLL BAR 2.5MM
353371 SET OF COMPOSITE LOWER ARM SHIMS
357212 LOWER INNER PIVOT PIN F+R (2)
901303 HEX SCREW SB M3x3 (10)
901305 HEX SCREW SB M3x5 (10)
901312 HEX SCREW SB M3x12 (10)
901410 HEX SCREW SB M4x10 (10)
902318 HEX SCREW SH M3x18 (10)
903306 HEX SCREW SFH M3x6 (10))
903308 HEX SCREW SFH M3x8 (10))
903408 HEX SCREW SFH M4x8 (10))
903410 HEX SCREW SFH M4x10 (10))
903414 HEX SCREW SFH M4x14 (10))
BAG
#333451
ALU ANTI-ROLL BAR PIVOT BALL 5.8 MM - SWISS 7075 T6 - HARDCOATED (2)
5. FRONT SUSPENSION
FRONT LOWER SUSP. ARMS
#352121-S SOFT OPTION
#352121 MEDIUM INCLUDED
#352121-H HARD OPTION
#352121-G GRAPHITE OPTION

18
KICK UP
ROLL CENTER DOWNSTOP
WHEELBASE
TRACK WIDTH
901410
SB M4x10
353371
SHIM 4x10x2
The tables below describe the amounts of kick-up, front track-width change depending on the combinations
of eccentric bushings used with 0 and 1mm, 1° offset. The 0.5mm, 0.5° represents the half change.
TRACK-WIDTH ROLL CENTER
FF FFFR FR(mm) (mm)
=308
=306
=310
=1
=0
=-1
The XRAY alu front lower suspension holders provide even greater range of
adjustment for the front suspension. Using different combinations of eccentric
bushings, fine adjustment of front kick-up, roll center, and front track-width
can be obtained. For more information about the influence of kick-up, front
track-width, and roll centers on car handling, please refer to HUDY Off-Road
Set-up Book (#209099).
Eccentric bushings have two different offsets from the center.
Middle position = 0.5 mm or 0.5° from center
Outer position = 1mm or 1° from center
DETAIL
FRONT ARM
L=R
DETAIL
Check for free movement.
DETAIL
Push the arm from both sides to create play.
(HUDY #107634)
ARM REAMER
If the suspension arms
do not move freely, use
a HUDY Arm Reamer to
resize the holes.
DETAIL
2mm 2mm
2mm 2mm
INITIAL SETTING ALTERNATIVE SETTING
FF FF
FR FR
BOOK
SET-UP
5. FRONT SUSPENSION
FR
FF
2mm
INITIAL SETTING
FF
0.5°
1°
INITIAL SETTING
FR
0.5°
1°
4.4mm
DOWNSTOP SETTING
DETAIL

19
903306
SFH M3x6
4x8mm
4x10mm
4x14mm
3x6mm
5. FRONT SUSPENSION
903408
SFH M4x8
903410
SFH M4x10
903414
SFH M4x14

20
5. FRONT SUSPENSION
ANTI-ROLL BAR
901303
SB M3x3
901305
SB M3x5
901312
SB M3x12
902318
SH M3x18
903308
SFH M3x8
FRONT ANTI-ROLL BARS
#352489 1.8mm OPTION
#352490 2.0mm OPTION
#352492 2.2mm OPTION
#352493 2.3mm OPTION
#352494 2.4mm OPTION
#352495 2.5mm INCLUDED
#352496 2.6mm OPTION
#352498 2.8mm OPTION
3x3mm
3x5mm
3x8mm
-2~0mm
3x18mm
L=R
2x
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely.
Step
➊
➊
➋
➌
➍
L=R
STEP DETAIL
➍
1.5mm
6mm
DETAIL
DETAIL
DETAIL
DETAIL
Step check for free movement.
➊
DETAIL
BOOK
SET-UP
Install the pivot balls with Professional
Multi Tool (HUDY #183011).
L=R