Xray 1/8 Luxury racing truggy User manual

WORLD CHAMPIONS

2
INTRODUCTION
The XRAY XT9 is a modern, high-competition premium luxury racing 1/8
nitro truggy that is the epitome of high-performance and fine distinctive
design. Your XT9 offers highest performance, responsive handling, and
traditionally exceptional XRAY quality, engineering, and design. The superb
craftsmanship and attention to detail are clearly evident everywhere on the
XRAY XT9.
XT9 was designed around a no compromise platform; the attention to detail
creates a low maintenance, extra long life nitro buggy. The ultra-low center
of gravity (CG) and optimized weight balance makes set-up, driving, and
maintenance easy and quick.
The XRAY XT9 was created by blending highest-quality materials and
excellent design. On high-speed flat tracks or bumpy tracks, whether driving
for fun or racing to win, the XT9 delivers outstanding performance, speed,
and precision handling.
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.
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 ngers or any objects inside rotating and moving parts, as this may
cause damage or serious injury as your nger, 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, ying 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 conict with or disrupt pedestrian or vehicular trafc.
• 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 difculties, 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 nd 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
RCAmerica, 2970 Blystone Lane, Suite 109
Dallas, Texas 75220
USA
Phone: [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 lter is clean and oiled.
• Never run your engine without an air lter. 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 ames 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
INTRODUCTION
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 re. 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 re 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 re. 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 rectied 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 nished.
• 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 re.
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 modication 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 nd 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 modications 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 nal 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 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 difculty nding
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 re or explosion, and ruin your engine.
• Nitro fuel is highly inammable, explosive, and poisonous. Never use fuel indoors
or in places with open res 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 ammability 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 ame, 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 ames, 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 res or explosions.
• Do not dispose of fuel or empty fuel containers in a re. There is danger of
explosion.

4
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 instant
glue
Cut off shaded
portion
Cut off
remaining
material
Tighten screw
gently
TOOLS REQUIRED
EQUIPMENT REQUIRED
TOOLS & EQUIPMENT INCLUDED
Assemble front
and rear the same
way
Apply oil
Use special
tool
Silicone Shock Oil Silicone Diff Oil Air Filter Oil
(HUDY #106240)
Receiver Pack
Transmitter .21ci (3.5cc) Engine Manifold
Exhaust
Glow Plug IgniterStarter Box & Battery Pack
Steering and
Throttle Servos
Battery Charger
Receiver
Lexan™ PaintFuel
Special Tool for all turnbuckles,
nuts (HUDY #181090)
CA Glue
Phillips 5.0mm
(HUDY TOOLS)
Socket 5.0 / 5.5mm
(HUDY TOOLS)
Allen 1.5 / 2.0 / 2.5mm
(HUDY TOOLS)
17mm Wheel Nut Tool
(HUDY #107570)
Side Cutters
(HUDY #189010)
Hobby Knife Body Reamer
(HUDY #107600)
or
(HUDY #107601)
Cross Wrench
(HUDY #107581)
Flywheel Tool
(HUDY #182015)
Scissors
(HUDY #188990)
Needle Nose Pliers
(HUDY #189020)
Snap Ring Pliers
(HUDY #189040)
➊ ➋ ➌
Apply grease Apply
threadlock
Ensure smooth
non-binding
movement
Use pliers Follow tip here
ARM REAMER 3mm/4mm
(HUDY TOOLS)
Graphite Grease
(HUDY #106210)
Transmitter Batteries
Threadlock
Follow Set-Up
Book
Use cleanerTime

5
XT9 TECH TIPS
Before lling the differentials with oil we suggest that you rst check gear mesh as below. 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.
For easier gear mesh adjustments, optional S13 x 0.2
shims are used. These shims can be placed behind the
bearing.

THE LOCATION OF THE SHIM(S) DEPENDS ON WHETHER YOU ARE TRYING TO CLOSE OR OPEN THE GAP:
INCLUDED SHIM OPTIONAL SHIM


TIP
insert shim(s) here
insert shim(s) here
insert shim(s) here
TIP
Tighten screw until pivot ball
is tight against block.
Lift ball joint until it snaps into
place over pivot ball. Ball joint
should move freely.
The nished joint. Loosen and remove screw.
INSTALLING PIVOT BALLS INTO COMPOSITE BALL-JOINTS
Place the pivot ball on the ball joint
and use a screw to tighten it to an
engine mount or some other part.

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 and comfortable drive pin replacements use
#106000 HUDY Drive Pin Replacement Tool.
To replace the worn pins use only
premium HUDY drive pins #106050.
GRAPHITE PARTS PROTECTION
TIP
Follow this tech tip to protect the graphite parts.
Fine sandpaper
Use ne sandpaper
to sand smooth the
edges of all graphite
parts.
Apply CA glue to all edges
of the graphite parts.
Protect all XT9
Graphite Parts:
• Front shock tower
• Rear shock tower
• Steering plate
• Upper plate
• Center diff mounting plate
Do not use drive shafts when
the pins are worn.
Press out the worn pins. Press in new pins and
regularly inspect for wear.
962080
S 8x0.1 962081 S 8x0.2

add 1 or 2 shims against diff
spur gear

add 1 or 2 shims on the other side
of the diff, away from spur gear
#962080 WASHER S 8 x 0.1 mm (10)
#962081 WASHER S 8 x 0.2 mm (10) #962130
WASHER
S 13 x 16 x 0.2 mm (10)

add 1 or 2 shims against diff spur gear

add 1 or 2 shims on the other side of the diff, away
from spur gear



6

1. FRONT & REAR DIFFERENTIALS
2x
F=R
STEP DETAIL
➊
➋
➌
➍
➎
➎
➎➏
➏
35 5020 DIFFERENTIAL CASE
35 5030 STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
35 5043 FRONT/REAR DIFF LARGE BEVEL GEAR 43T - HUDY STEEL
35 5061 FRONT DIFF OUTDRIVE ADAPTER - LONG (2) - HUDY SPRING STEEL™
35 5080 DIFF PIN (2)
35 5090 DIFF GASKET (4)
90 3312 HEX SCREW SFH M3x12 (10)
94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
96 4030 WASHER S 3.5x12x0.2 (10)
96 4060 WASHER S 6x18x0.2 (10)
97 1060 SILICONE O-RING 6x1.5 (10)
98 0212 PIN 2x11.6 (10)
BAGS
940816
903312
355043
964060
355030
971060
355020
940816
355090
964030
980212
971060 355080
355061
355061


#106220 - Standard
#106221 - Extra
#106222 - Premium
940816
BB 8x16x5
964060
S 6x18x0.2
971060
O 6x1.5
980212
P 2x11.6
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)

 
 
➏
OPTIONAL
ACTIVE FRONT DIFF
#355101
• High-performance adjustable front Active Differential for improved speed & handling
• Fully adjustable on- and off-power performance using different internal segments and gears
• Improves diff action and increases traction
• Easy and consistent steering

7

Fill the differentials
with oil just above the
satellite gears.
IMPORTANT!
After assembly the differentials should have a length of 32.4 mm measured
from the ends of the installed ball-bearings. If differentials are longer,
retighten the 4 screws holding the crown gears.
32.4mm
VERY IMPORTANT!
OIL
INCORRECT
CORRECT
OILOIL
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
44.5g 46.9g
1. Put the diff (without oil) on the scale and
check the weight (approximately 44,5g).

2. Slowly pour oil into the diff and watch
the weight. Add 2.4g of oil into the diff. The
approximate weight of the diff+oil is 46.9g.
Do not overll the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.

OIL
FRONT & REAR DIFFERENTIALS
964030
S 3.5x12x0.2
903312
SFH M3x12
2x
F=R
➊
➋
➌
➍
➎
➎
➏
➊
➋
➌
➍
940816
BB 8x16x5
964060
S 6x18x0.2
971060
O 6x1.5
980212
P 2x11.6
STEP DETAIL


#106220 - Standard
#106221 - Extra
#106222 - Premium
Use these silicone oils included in the kit for initial settings:
Front diff: 10000cSt / Rear diff: 5000cSt

Silicone oil 5000cSt
Fill just above the
satellite gears.

Silicone oil 10000cSt
Fill just above the
satellite gears.
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)
Tighten the screws equally Finish tightening in this order

8

STEP DETAIL
CENTER DIFFERENTIAL
BAG
➊
➋
➌
➍
➎
➎
➏
➏➎
355071
940816
903312
355048
971060
355030
971060 355020
940816
355090
964060
964030
980212
355080
355071
35 5020 DIFFERENTIAL CASE
35 5030 STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
35 5048 CENTER DIFF SPUR GEAR 48T
35 5071 CENTER DIFF OUTDRIVE ADAPTER - LIGHTWEIGHT - HUDY STEEL (2)
35 5080 DIFF PIN (2)
35 5090 DIFF GASKET (4)
90 3312 HEX SCREW SFH M3x12 (10)
94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
96 4030 WASHER S 3.5x12x0.2 (10)
96 4060 WASHER S 6x18x0.2 (10)
97 1060 SILICONE O-RING 6x1.5 (10)
98 0212 PIN 2x11.6 (10)


#106220 - Standard
#106221 - Extra
#106222 - Premium
940816
BB 8x16x5
971060
O 6x1.5
964060
S 6x18x0.2
980212
P 2x11.6
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)

 
  
   
  
➏

9

After assembly the differential should have a length of 32.4 mm measured
from the ends of the installed ball-bearings. If differential is longer,
retighten the 4 screws holding the spur gear.
32.4 mm
➊
➋
➍
➎
➎
➏
➌
971060
O 6x1.5
964060
S 6x18x0.2
980212
P 2x11.6
VERY IMPORTANT!
Fill the differentials
with oil just above
the satellite gears.
OIL
INCORRECT
CORRECT

Silicone oil 10000cSt
Fill to just above the satellite gears.
OIL
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
40.6g 43g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40.6g).

2. Slowly pour oil into the diff and watch
the weight. Add 2.4g of oil into the diff. The
approximate weight of the diff+oil is 43g.

OIL
940816
BB 8x16x5
IMPORTANT!
Do not overll the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.
CENTER DIFFERENTIAL
964030
S 3.5x12x0.2
903312
SFH M3x12
Tighten the screws equally Finish tightening in this order
➊
➋
➌
➍
STEP DETAIL


#106220 - Standard
#106221 - Extra
#106222 - Premium
Use the following silicone oil included in the kit for initial setting:
Center diff: 10000cSt
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)

10
2. FRONT TRANSMISSION
940816
BB 8x16x5
902312
SH 3x12
980314
P 3x14
901404
SB 4x4
901310
SB 3x10
902310
SH 3x10
Graphite Grease
(HUDY #106210)
Follow the TECH TIP on page 5
for drive shaft pin servicing
NOTE
ORIENTATION
SHORT CVD DRIVE SHAFT
ASSEMBLED VIEW
Cut on both front
and rear bulkhead blocks
 inserting the clip on the central CVD shaft joint, apply a small amount of
threadlock on the area where the clip goes.
 inserting the clip on the central CVD shaft joint, turn the clip so that the slot is
90°from the pin. This will prevent the pin from opening the clip.
PIN
step
step
step
➊
➊
➋
➋
➌
➌
➍
➍
step
4
STEP DETAIL
➍
STEP DETAIL
➎
FRONT DIFF 902312
35 1308 XT8 BODY POSTS - V2
35 2000 DIFF BULKHEAD BLOCK SET FRONT
35 2097 XT8 GRAPHITE FRONT SHOCK TOWER - CNC MACHINED 3.5MM
35 5108 BEVEL DRIVE GEAR 10T
35 5236 XB9 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5416 XB9 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
35 5471 XB9 DRIVE SHAFT LOCKING RING (2)
35 5472 XB9 DRIVE SHAFT BOOT (2)
35 5482 XT9 CVD UNIVERSAL CENTRAL DRIVE SHAFT FRONT - HUDY SPRING STEEL™
90 1310 HEX SCREW SB M3x10 (10)
90 1404 HEX SCREW SB M4x4 (10)
90 2310 HEX SCREW SH M3x10 (10)
90 2312 HEX SCREW SH M3x12 (10)
94 0816 HIGH-SPEED BALL-BEARING 8x16x5 RUBBER SEALED (2)
98 0314 PIN 3x14 (10)
BAG
➎
➎
➎
SHORT
DETAIL
FRONT DIFF 10000 cSt
Graphite Grease
(HUDY #106210)
Follow the TECH TIP on page 5
to protect graphite parts
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
The ring can be assembled with hands
but for easy disassembly, we recommend
using snap ring pliers (HUDY #189040)


#106220 - Standard
#106221 - Extra
#106222 - Premium
902312
902310
355472
355471
355482
355236
355416
352000
355108 352000 352097
901310
351308
980314
901404
940816
940816
3.5mm
3x10
3x12
3x10
4x4

11
REAR TRANSMISSION
940816
BB 8x16x5
902312
SH 3x12
980314
P 3x14
902310
SH 3x10
901404
SB 4x4
Graphite Grease
(HUDY #106210)
Follow the TECH TIP on page 5
for drive shaft pin servicing
NOTE
ORIENTATION
LONG CVD DRIVE SHAFT
ASSEMBLED VIEW
Cut on both front
and rear bulkhead blocks
 inserting the clip on the central CVD shaft joint, apply a small amount of
threadlock on the area where the clip goes.
 inserting the clip on the central CVD shaft joint, turn the clip so that the slot is
90°from the pin. This will prevent the pin from opening the clip.
BAG
step
step
step
➊
➊
➋
➋
➌
➌
➍
➍
step
4
STEP DETAIL
➎
REAR DIFF
902312
35 1330 XB808 COMPOSITE REAR BODY POST - LONG
35 2001 DIFF BULKHEAD BLOCK SET REAR
35 3097 XT8 GRAPHITE REAR SHOCK TOWER - CNC MACHINED 3.5MM - V2
35 5108 BEVEL DRIVE GEAR 10T
35 5236 XB9 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5416 XB9 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
35 5471 XB9 DRIVE SHAFT LOCKING RING (2)
35 5472 XB9 DRIVE SHAFT BOOT (2)
35 5682 XT9 CVD UNIVERSAL CENTRAL DRIVE SHAFT REAR - HUDY SPRING STEEL™
90 1404 HEX SCREW SB M4x4 (10)
90 2310 HEX SCREW SH M3x10 (10)
90 2312 HEX SCREW SH M3x12 (10)
94 0816 HIGH-SPEED BALL-BEARING 8x16x5 RUBBER SEALED (2)
98 0314 PIN 3x14 (10)
➎
➎
➎
LONG
DETAIL
Graphite Grease
(HUDY #106210)
REAR DIFF  cSt
The ring can be assembled with hands but
for easy using, we recommend using snap
ring pliers (HUDY #189040)
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.


#106220 - Standard
#106221 - Extra
#106222 - Premium
902312
902310
355472
355471
355682
355236
355416 352001
355108
352001 353097
351330 or
351308
980314
901404
940816
940816
PIN
STEP DETAIL
➍
Follow the TECH TIP on page 5
to protect graphite parts 3x12
3x10
4x4
SHORT LONG
Based on the type of body used, choose
the appropriate body mount (short or
long) and attach it to the show tower at
the proper height. If an original XRAY XT8
body is used, use the SHORT body post.

12
33 3450 ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
35 2001 DIFF BULKHEAD BLOCK SET REAR
35 2314 COMPOSITE ECCENTRIC BUSHINGS (2)
35 2460 PIVOT BALL 5.8 (10)
35 2470 BALL JOINT 5.8 (8)
35 3118 XT8 REAR LOWER SUSPENSION ARM
35 3304 ALU REAR LOWER SUSP. HOLDERS SET- SQUARE ADJ. ROLL-CENTER
35 3316 ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER
35 3327 ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER
35 3371 SET OF COMPOSITE LOWER ARM SHIMS
35 3428 REAR ANTI-ROLL BAR 2.8MM
35 7212 LOWER INNER PIVOT PIN F+R (2)
90 1303 HEX SCREW SB M3x3 (10)
90 1305 HEX SCREW SB M3x5 (10)
90 1312 HEX SCREW SB M3x12 (10)
90 1408 HEX SCREW SB M4x8 (10)
90 2318 HEX SCREW SH M3x18 (10)
90 3308 HEX SCREW SFH M3x8 (10))
90 9372 SCREW PHILLIPS SS 3.5x22 (10)
90 9395 SCREW PHILLIPS SS 3.5x45 (10)
BAG
3. REAR SUSPENSION

 

  
  
 
 

  
909395
901408
353327 352314
353371
352001
909372
353316
352314
357212
902318
353118
903308 901305
901303
333450
352470
901312
352470
352460

13






REAR SUSPENSION
909395
SS 3.5x45
909372
SS 3.5x22
901408
SB M4x8

Middle position = 0.5 mm or 0.5° from center Outer position = 1mm or 1° from center
The new XRAY rear alu lower suspension holders provide even greater range of adjustment for the rear suspension. Using different combinations of eccentric
bushings, you can achieve fine adjustment of rear anti-squat, rear toe-in and rear roll center.. For more information about the influence of rear anti-squat,
rear toe-in and rear roll center 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, 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.
Example:
0(RR) - 0 (RF) = 3°
0(RR) - 0.5 (RF) = 3.5°
0(RR) - 1 (RF) = 4°
 
   
=3
=4
=2
=4
=3
=5
=2
=3
=1
= 3
= 3.5
= 4
=0mm
=1mm
=-1mm
=3
=4
=2
=2
=3
=1
=4
=5
=3
Check for free
movement
REAR ARM
L=R
(HUDY #107634)
ARM REAMER
If the suspension arm does not move freely use a
HUDY Arm Reamer to resize the holes of the arms.
➊
➊
➋
➌
➌
➍
➍
➎
2mm
4x8
2mm
RR
RF
All possible mounting
alternatives of eccentric bushings
L=R
DOWNSTOP SETTING
5.2mm
Composite eccentric bushings
Initial position
1 10.5 0.50
Composite eccentric bushings
Initial position
1 10.5 0.50

14
REAR SUSPENSION

901303
SB M3x3
901305
SB M3x5
901312
SB M3x12
902318
SH M3x18
➊
➋
➌
➍
3x5
3x8
903308
SFH M3x8
L=R
2x
1.5mm
6mm
Follow the TECH TIP on page 5 to
install the pivot balls
3x3
L=R
Step check for free movement
➊
0mm
STEP DETAIL
➍
3x18
DETAIL
DETAIL
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely
Step
➊

15


980317
P 3x17
901404
SB M4x4
901504
SB M5x4
902305
SH M3x5
961032
S 3.2
980264
P 2.5x14
940816
BB 8x16x5


#106220 - Standard
#106221 - Extra
#106222 - Premium
➊
➋
➌
➍
➑
➒
➓
➐
➏
➏➎
ASSEMBLED VIEW
L=R
4. REAR SUSPENSION
35 2638 ADJ. TURNBUCKLE M5 L/R 91 MM - HUDY SPRING STEEL™ (2)
35 3130 REAR UPPER INNER CAMBER LINK BALL JOINT (2)
35 3151 RELIEF REAR UPPER OUTER CAMBER LINK BALL JOINT (2)
35 3160 MOUNTING BALL 6.8 (4)
35 3170 PIVOT BALL 6.8 (4)
35 3350 REAR HUB CARRIER RIGHT
35 3360 REAR HUB CARRIER LEFT
35 3521 XB9 REAR WING POSTS
35 3530 COMPOSITE ADJ. SHIM FOR REAR WING PLATE (2)
35 3559 COMPOSITE REAR WING MOUNT BRACE (2)
35 5218 CVD DRIVE AXLE - LIGHTWEIGHT - HUDY SPRING STEEL™
35 5239 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
BAG
2x
2x
L=R
L=R
L=R
Graphite Grease (HUDY #106210)
2mm
To tighten the setscrew you can also use the
HUDY 17mm Wheel Nut Tool #107570
3x17
2.5x14
Follow the TECH TIP on page 5
for drive shaft pin servicing
2mm

 

  
 
 

2.5mm
35 5252 ALU WHEEL AXLE OFFSET “+2MM” - HARD COATED (2)
35 5280 XT8 UNIVERSAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
35 7330 REAR LOWER OUTER PIVOT PIN (2)
90 1404 HEX SCREW SB M4x4 (10)
90 1504 HEX SCREW SB M5x4 (10)
90 2305 HEX SCREW SH M3x5 (10)
90 2314 HEX SCREW SH M3x14 (10)
90 2316 HEX SCREW SH M3x16 (10)
90 2322 HEX SCREW SH M3x22 (10)
94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
96 0030 NUT M3 (10)
96 1032 WASHER S 3.2 (10)
98 0264 PIN 2.5x14 (10)
98 0317 PIN 3x17 (10)
902314
902322
353530
902322
980317
901504
940816
940816
960030
980264
960030
902316 960030
901404
902322
902305
357330
961032
353521
353559
353521
353350
353360
355252
353350
353360
355218
355239
355280
353170
353151
352638
353160
353130
➎
STEP
Tighten the screw fully when
the pin is installed
Marked “R“
INITIAL POSITION
Shims for wheel
base adjustment
Please ensure that the rear upright moves freely. If the rear
upright is not moving freely use use sandpaper to thin both
wheelbase adjustment shims until the rear upright moves freely.
If the rear upright does not move
freely, use a HUDY Arm Reamer
to resize the hole.
ARM REAMER
(HUDY #107633)
5x4
4x4

16


REAR SUSPENSION

902322
SH M3x22
902316
SH M3x16
960030
N M3
902314
SH M3x14
960030
N M3
902322
SH M3x22
Follow the TECH TIP on page 5
to install the pivot balls
DETAIL Use tools to
tighten as shown
Special Tool for all
turnbuckles, nuts
(HUDY #108090)
INITIAL POSITION
INITIAL POSITION
NOTE
ORIENTATION
NOTE
ORIENTATION
Right thread Left thread Right threadLeft thread
60.3 mm
INITIAL POSITION
RIGHT
THREAD
LEFT
THREAD
3x22
3x22
3x14
3x14
3x16
3x22
60.3 mm
RIGHT
THREAD
LEFT
THREAD








Follow the TECH TIP on page 5
to install the pivot balls
For stiffer wing mounting use optional
alu wing mount brace #353550.
L=R
L=R
2x
2x

17
5. FRONT SUSPENSION
33 3450 ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
35 2000 DIFF BULKHEAD BLOCK SET FRONT
35 2118 XT8 FRONT LOWER SUSPENSION ARM RIGHT
35 2128 XT8 FRONT LOWER SUSPENSION ARM LEFT
35 2304 ALU FRONT LOWER SUSP. HOLDERS SET - SQUARE ADJ. ROLL-CENTER
35 2323 ALU FRONT LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER
35 2324 ALU FRONT LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER
35 2314 COMPOSITE SQUARE ADJ. ROLL-CENTER BUSHINGS (2)
35 2424 FRONT ANTI-ROLL BAR 2.4MM
35 2460 PIVOT BALL 5.8 (10)
35 2470 BALL JOINT 5.8 (8)
35 3371 SET OF COMPOSITE LOWER ARM SHIMS
35 7212 LOWER INNER PIVOT PIN F+R (2)
90 1303 HEX SCREW SB M3x3 (10)
90 1305 HEX SCREW SB M3x5 (10)
90 1312 HEX SCREW SB M3x12 (10)
90 1408 HEX SCREW SB M4x8 (10)
90 2318 HEX SCREW SH M3x18 (10)
90 3308 HEX SCREW SFH M3x8 (10))
90 9372 SCREW PHILLIPS SS 3.5x22 (10)
90 9395 SCREW PHILLIPS SS 3.5x45 (10)
BAG

 

  
  
  
  
  
909372
901408
902318
352118
909395
901303
901312
901305
903308
352324
352314
357212 352314
352128
353371
333450
352470
352470352460
352000
352323

18
FRONT SUSPENSION





901408
SB M4x8
909395
SS 3.5x45
909372
SS 3.5x22
All possible mounting alternatives
of eccentric bushings
Composite eccentric bushings
Initial position
1 10.5 0.50
Composite eccentric bushings
Initial position
1 10.5 0.50
FRONT ARM
L=R
(HUDY #107634)
ARM REAMER
If the suspension arms do not move freely, use
a HUDY Arm Reamer resize the holes.
L=R
DOWNSTOP SETTING
The tables below describe the amounts of kick-up, 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.
Example:
 
     
=6
=5
=7
=5
=4
=6
=7
=6
=8
=1
=0
=-1

 4° 5° 6° 7° 8°
17° 21° 22° 23° 24° 25°
16° 20° 21° 22° 23° 24°
15° 19° 20° 21° 22° 23°
14° 18° 19° 20° 21° 22°
13° 17° 18° 19° 20° 21°
Total caster is the angle that the C-hub is to the flat chassis bottom.
Caster is affected not only by front kick up but also by the C-hub
caster and caster eccentric bushing. The combination of all three
represents the total caster angle. The XT9 includes a 15°caster
block with the centric bushing. 1 and 2mm eccentric bushings can
be purchased as options.


0(FF) - 0(FR) = 6°
0.5(FF) - 0(FR) = 6.5°
1(FF) - 0(FR) = 7°
= 6
= 6.5
= 7
The new XRAY alu front lower suspension holders provide even greater range of adjustment for the front suspension. Using different combinations of eccentric bushings, you can obtain fine adjustment of front kick-up
and roll center. For more information about the influence of kick-up and roll centers on car handling, please refer to HUDY Off-Road Set-up Book (#209099).

Middle position = 0.5 mm or 0.5° from center Outer position = 1mm or 1° from center
➊
➊
➋
➌
➌
➍
➍
➎
2mm
4x8
FR
FF
2mm
1.5mm
3.5x22
3.5x45

19
FRONT SUSPENSION

901303
SB M3x3
901305
SB M3x5
901312
SB M3x12
902318
SH M3x18
903308
SFH M3x8
L=R
2x
1.5mm
6mm
Follow the TECH TIP on page 5
to install the pivot balls
Step check for free movement
➊
DETAIL
DETAIL
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely
Step
➊
➊
➋
➌
➍
3x5
3x8
3x3
L=R
0mm
STEP DETAIL
➍
3x18

20
20


#106220 - Standard
#106221 - Extra
#106222 - Premium
➊
➊
➊
➋
980317
P 3x17
901404
SB M4x4 901504 SB M5x4
902412
SH M4x12
902416
SH M4x16
980264
P 2.5x14
940816
BB 8x16x5


6. FRONT SUSPENSION
35 2150 FRONT UPPER ARM BALL JOINT (2)
35 2179 COMPOSITE BUSHING & BALL MOUNT SET (2+2)
35 2210 COMPOSITE C-HUB RIGHT
35 2220 COMPOSITE C-HUB LEFT
35 2250 STEERING BLOCK RIGHT - V2 (HAND MODIFIED)
35 2260 STEERING BLOCK LEFT - V2 (HAND MODIFIED)
35 2297 STEEL STEERING BUSHING - LONG (2+2)
35 2628 XT8 ADJ. TURNBUCKLE M5 L/R 75 MM - SPRING STEEL (2)
35 3130 REAR UPPER INNER CAMBER LINK BALL JOINT (2)
35 3160 MOUNTING BALL 6.8 (4)
35 3170 PIVOT BALL 6.8 (4)
35 5218 CVD DRIVE AXLE - LIGHTWEIGHT - HUDY SPRING STEEL™
35 5239 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5252 ALU WHEEL AXLE OFFSET “+2MM” - HARD COATED (2)
35 5280 XT8 UNIVERSAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
35 7230 FRONT LOWER OUTER PIVOT PIN (2)
90 1404 HEX SCREW SB M4x4 (10)
90 1504 HEX SCREW SB M5x4 (10)
90 2305 HEX SCREW SH M3x5 (10)
90 2318 HEX SCREW SH M3x18 (10)
90 2322 HEX SCREW SH M3x22 (10)
90 2412 HEX SCREW SH M4x12 (10)
90 2416 HEX SCREW SH M4x16 (10)
94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
96 0030 NUT M3 (10)
98 0264 PIN 2.5x14 (10)
98 0317 PIN 3x17 (10)
BAG
353170
352628 902318
2x
➍
➏
➏
➐
➑
Graphite Grease
(HUDY #106210)
Marked “R“
353160
352150
960030
357230 901504
352297
352297 355218
355280
352179
902305
352250
960030
940816
940816 980264
355239
901404
902416
902322
902412
352210
980317
355252
➌
➌
➌
353130 352220
352260
3x17
2.5x14
4x16
4x12
To tighten the setscrew you can also
use the HUDY 17mm Wheel Nut Tool
#107570
Follow the TECH TIP on page 5
for drive shaft pin servicing
Marked “L“
ASSEMBLED VIEW
Check for free
movement
2.5mm
➒
➓
➎
➎
STEP
Tighten the screw fully when
the pin is installed
Marked “R“
Marked “R“
➋

 

  
 
 

352179
4x4
5x4