Xray XB8 Series User manual

2
INTRODUCTION
The XRAY XB8 is a modern, high-competition premium luxury racing 1/8
nitro buggy that is the epitome of high-performance and fine distinctive
design. Your XB8 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 XB8.
XB8 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 XB8 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 XB8 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
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 #108090)
CA Glue
Phillips 5.0mm
(HUDY TOOLS)
Socket 5.0 / 5.5mm
(HUDY TOOLS)
Allen 1.5 / 2.0 / 2.5 / 3.0mm
(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 cleaner
or WD40
Time
Ball Allen 2.5mm
(HUDY TOOLS)

5
XB8 TECH TIPS
Before lling in 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, OPTION S13 x 0.2
shims are used. These shims can be placed behind the
bearing which is quicker.

THE LOCATION OF THE SHIM(S) DEPENDS ON WHETHER YOU ARE TRYING TO CLOSE OR OPEN THE GAP:
INCLUDED SHIM OPTION SHIM


TIP
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 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 XB8
Graphite Parts:
• Front shock tower
• Rear shock tower
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 5003 XB8 FRONT/REAR DIFFERENTIAL 46T - SET
35 5020 DIFFERENTIAL CASE
35 5030 STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
35 5046 FRONT/REAR DIFF LARGE BEVEL GEAR 46T - HUDY STEEL
35 5063 F/R DIFF OUTDRIVE ADAPTER - LIGHTW. - HUDY SPRING 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)
BAGS
940816
903312
355046
964060
355030
971060
355020
940816
355090
964030
980212
971060 355080
355063
355063
940816
BB 8x16x5
964060
S 6x18x0.2
971060
O 6x1.5
980212
P 2x11.6
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)
* These OPTION bevel gears must be used
with OPTION #355110 bevel gear 12T

 
 
 
➏
• 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
OPTION
#355105 ACTIVE FRONT DIFF


#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

7

Fill the differentials
with oil just above the
satellite gears.
IMPORTANT!
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
VERY IMPORTANT!
OIL
INCORRECT
CORRECT
OILOIL
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
40g 42.1g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40g).

2. Slowly pour oil into the diff and watch
the weight. Add 2.1g of oil into the diff. The
approximate weight of the diff+oil is 42.1g.
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
Use these silicone oils included in the kit for initial settings:
Front diff: 5000cSt / Rear diff: 2000cSt

Silicone oil 2 000cSt
Fill just above the
satellite gears.

Silicone oil 5000cSt
Fill just above the
satellite gears.
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)
Tighten the screws equally Finish tightening in this order


#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

8

STEP DETAIL
CENTER DIFFERENTIAL
BAG
➊
➋
➌
➍
➎
➎
➏
➏➎
355071
940816
903312
355050
971060
355030
971060 355020
940816
355090
964060
964030
980212
355080
355071
35 5012 CENTRAL DIFFERENTIAL - SET
35 5020 DIFFERENTIAL CASE
35 5030 STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
35 5050 CENTER DIFF SPUR GEAR 46T
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)
940816
BB 8x16x5
971060
O 6x1.5
964060
S 6x18x0.2
980212
P 2x11.6
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)

 
 
   
    
 
 

➏


#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

9

After assembly the differential should have a length of 32.3~32.5 mm
measured from the ends of the installed ball-bearings. If differential is
longer, retighten the 4 screws holding the spur gear.
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 5000cSt
Fill to just above the satellite gears.
OIL
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
40g 42.1g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40g).

2. Slowly pour oil into the diff and watch
the weight. Add 2.1g of oil into the diff. The
approximate weight of the diff+oil is 42.1g.

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.
32.3~32.5 mm
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
Use the following silicone oil included in the kit for initial setting:
Center diff: 5000cSt
Graphite Grease
(HUDY #106210)
Graphite Grease
(HUDY #106210)


#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

10
2. FRONT TRANSMISSION
940816
BB 8x16x5
902312
SH 3x12
980314
P 3x14
901404
SB 4x4
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
➊
➊
➋
➋
➌
➌
➍
➍
STEP DETAIL
➍
STEP DETAIL
➎
355003
FRONT DIFF
902312
35 2005 XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR
35 5003 XB8 FRONT/REAR DIFFERENTIAL 46T - SET
35 5114 BEVEL DRIVE GEAR 14T
35 5236 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5416 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
35 5425 FRONT CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
35 5471 DRIVE SHAFT LOCKING RING (2)
35 5472 DRIVE SHAFT BOOT (2)
90 1404 HEX SCREW SB M4x4 (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 5000 cSt
Graphite Grease
(HUDY #106210)
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
The ring can be assembled with hands but
for easy disassembling, we recommend to
use snap ring pliers (HUDY #189040)
355472
355471
355425
355236
355416 352005
355114
352005
980314
901404
940816
940816




#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

11
REAR TRANSMISSION
940816
BB 8x16x5
902312
SH 3x12
980314
P 3x14
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
➊
➊
➋
➋
➌
➌
➍
➍
STEP DETAIL
➎
355003
REAR DIFF 902312
35 2005 XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR
35 5003 XB8 FRONT/REAR DIFFERENTIAL 46T - SET
35 3096 XB8 GRAPHITE REAR SHOCK TOWER - CNC MACHINED 3.5MM
35 5114 BEVEL DRIVE GEAR 14T
35 5236 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5416 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
35 5625 REAR CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
35 5471 DRIVE SHAFT LOCKING RING (2)
35 5472 DRIVE SHAFT BOOT (2)
90 1404 HEX SCREW SB M4x4 (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)
Follow the TECH TIP on page 5
to protect graphite parts
NOTE
ORIENTATION
REAR DIFF  cSt
The ring can be assembled with hands but
for easy disassembling, we recommend to
use snap ring pliers (HUDY #189040)
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
902312
355472
355471
355625
355236
355416 352005
355114
352005 353096
980314
901404
940816
940816
PIN
STEP DETAIL
➍




#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

12
BAG
3. REAR SUSPENSION

 

  
    
   
 

  
909395
901408
353325
352314
353371
352005
909372
353317
352314
357212
OPTION
# 353192 Composite Rear Mud Protector (L+R)
902318
353117
903308
901305
901303
333450
352470
901312
352470
352460
33 3450 ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
35 2005 XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR
35 2314 COMPOSITE ECCENTRIC BUSHINGS - V2 (2)
35 2460 PIVOT BALL 5.8 (10)
35 2470 BALL JOINT 5.8 (8)
35 3117 XB8 COMPOSITE REAR LOWER SUSPENSION ARM
35 3192 XB8 COMPOSITE REAR MUD PROTECTOR (L+R)
35 3317 XB8 ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER
35 3325 XB8 ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER
35 3371 SET OF COMPOSITE LOWER ARM SHIMS
35 3426 REAR ANTI-ROLL BAR 2.6MM
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)

13






REAR SUSPENSION
909395
SS 3.5x45
909372
SS 3.5x22
901408
SB M4x8
353371
SHIM 4x10x2

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, 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.
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
=308
=306
=310
=3
=4
=2
=2
=3
=1
=4
=5
=3
L=R
3.3mm
DOWNSTOP SETTING
Check for free movement
REAR ARM
(HUDY #107634)
ARM REAMER
If the suspension arm does not move freely use a
HUDY Arm Reamer to size the holes of the arms.
➊
➊
➋
➌
➌
➍
➍
➎
2mm
4x8
RR
RF
Composite eccentric bushings
INITIAL SETTING
1 10.5 0.50
All possible mounting
alternatives of eccentric bushings
Composite eccentric bushings
INITIAL SETTING
1 10.5 0.50
L=R
Push the arm from both sides to create play

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

15
980317
P 3x17
941319
BB 13x19x4
901504
SB M5x4
903416
SFH M4x16
980263
P 2.5x13
➊
➋
L=R
➌
➍
➑
➐
➒
➏
➍
➎
ASSEMBLED VIEW
353370
SHIM 3x9x2
960030
N M3
940814
BB 8x14x4
4. REAR SUSPENSION
35 1330 COMPOSITE REAR BODY POST - LONG
35 2234 XB8 ALU REAR HUB MOUNTING PLATE - SWISS 7075 T6
35 2633 ADJ. TURNBUCKLE M5 L/R 72 MM - HUDY SPRING STEEL™ (2)
35 2657 BALL STUD 6.8MM WITH BACKSTOP L=8MM - M4x6 (2)
35 3131 REAR UPPER INNER CAMBER LINK BALL JOINT - V3 (2)
35 3160 MOUNTING BALL 6.8 (4)
35 3352 XB8 COMPOSITE REAR UPRIGHT
35 3370 SET OF COMPOSITE REAR HUB CARRIER SHIMS
35 3521 REAR WING POSTS
35 3559 COMPOSITE REAR WING MOUNT BRACE (2)
35 5211 CVD DRIVE AXLE - HUDY SPRING STEEL™
35 5221 CVD UNIVERSAL DRIVE SHAFT - HUDY SPRING STEEL™
BAG
2x
L=R
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
L=R
L=R
Graphite Grease
(HUDY #106210)
INITIAL SETTING
2mm
Check for free
movement
To tighten the setscrew you can
also use the HUDY 17mm Wheel
Nut Tool #107570
3x17
2.5x13
8x14x4
13x19x4
Follow the TECH TIP on page
5 for drive shaft pin servicing
Do not overtighten the self-locking nut.
Overtightening may result in suspension binding.
If the rear upright does not move freely, use a HUDY Arm Reamer to resize the hole.
ARM REAMER
2mm

 
 

  
2.5mm
INITIAL SETTING
35 5237 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5250 ALU WHEEL AXLE - BLACK COATED (2)
35 7331 XB808 REAR LOWER OUTER PIVOT PIN SCREW 3MM (2)
90 1504 HEX SCREW SB M5x4 (10)
90 2310 HEX SCREW SH M3x10 (10)
90 2314 HEX SCREW SH M3x14 (10)
90 2318 HEX SCREW SH M3x18 (10)
90 2320 HEX SCREW SH M3x20 (10)
90 3416 HEX SCREW SFH M4x16 (10)
94 0814 HIGH-SPEED BALL-BEARING 8x14x4 BLUE COVERED (2)
94 1319 HIGH-SPEED BALL-BEARING 13x19x4 BLUE COVERED (2)
96 0030 NUT M3 (10)
98 0263 PIN 2.5x13 (10)
98 0317 PIN 3x17 (10)
(HUDY #107633)
902314
902320 903416
352234
980317
901504
940814
941319
357331
902310
980263
960030
902318 960030
902318
960030
353521
353559
353521
353352
355250
353370
355211 355237
355221
352657
353131
352633
353160
353131
351330


#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil

16

REAR SUSPENSION

902318
SH M3x18
960030
N M3
902314
SH M3x14
960030
N M3
902318
SH M3x18 902320
SH M3x20
902310
SH M3x10
353380
SHIM 4x7.5x1
353381
SHIM 4x7.5x2
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)
NOTE ORIENTATION
NOTE ORIENTATION NOTE ORIENTATION
NOTE
ORIENTATION
Right threadLeft thread Right thread Left thread
47.3 mm
INITIAL POSITIONS
3x18
3x18
3x10
3x20
3x14
3x14
47.3 mm
RIGHT
THREAD
RIGHT THREAD
LEFT
THREAD LEFT THREAD








Follow the TECH TIP on page 5
to install the pivot balls
For stiffer wing mounting use OPTION
alu wing mount brace #353550.
INITIAL POSITIONS
Single Body Post
INITIAL SETTING
INITIAL POSITIONS
OPTION shims from the Last Aid Bag can be
used for roll center adjustment.
#353380 - Alu shim 4x7.5x1mm
#353381 - Alu shim 4x7.5x2mm
OIL
OIL
OIL
OIL
Double Body Posts
OPTION SETTING

17
5. FRONT SUSPENSION
33 3450 ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
35 2005 DIFF BULKHEAD BLOCK SET FRONT/REAR
35 2117 XB8 COMPOSITE FRONT LOWER SUSPENSION ARM
35 2323 ALU FRONT LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER - V2
35 2324 ALU FRONT LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER - V2
35 2314 COMPOSITE SQUARE ADJ. ROLL-CENTER BUSHINGS - V2 (2)
35 2460 PIVOT BALL 5.8 (10)
35 2470 BALL JOINT 5.8 (8)
35 2494 FRONT ANTI-ROLL BAR 2.4MM
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
352117
909395
901303
901312
901305
903308
352324
352314
357212
352314
353371
333450
352470
352470
352460
352005
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 SETTING
1 10.5 0.50
Composite eccentric bushings
INITIAL POSITION
1 10.5 0.50
353371
SHIM 4x10x2
(HUDY #107634)
ARM REAMER
If the suspension arms do not move freely, use
a HUDY Arm Reamer resize the holes.
L=R
1.7mm
DOWNSTOP SETTING
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° off set. The 0.5mm, 0.5° represent the half change.
 
   
=308
=306
=310
=1
=0
=-1
The new 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).

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
4x8
FR
FF
2mm
FRONT ARM
L=R
Check for free movement
DETAILDETAIL
Use the shim from Bag 03
Push the arm from both sides to create play

19
FRONT SUSPENSION

901303
SB M3x3
901305
SB M3x5
901312
SB M3x12
902318
SH M3x18
903308
SFH M3x8
3x3
3x5
3x8
-2~0mm
3x18
L=R
2x
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
L=R
STEP DETAIL
➍
1.5mm
6mm
Follow the TECH TIP on page 5 to
install the pivot balls

20
941319
BB 13x19x4
901504
SB M5x4
940814
BB 8x14x4
➊
➋
L=R
980317
P 3x17
980263
P 2.5x13
903416
SFH M4x16


#106220 - Standard
#106221 - Extra
#106222 - Premium
#106230 - Bearing Oil
6. FRONT SUSPENSION
35 2132 XB8 FRONT UPPER ARM RIGHT
35 2142 XB8 FRONT UPPER ARM LEFT
35 2153 XB8 FRONT UPPER ARM BALL JOINT (L+R)
35 2231 XB8 ALU STEERING KING PIN PLATE - SWISS 7075 T6 - L+R 14°
35 2240 XB8 STEERING BLOCK
35 2623 ADJ. TURNBUCKLE M5 L/R 28 MM - HUDY SPRING STEEL™ (2)
35 3172 PIVOT BALL 11.0 (2)
35 5211 CVD DRIVE AXLE - HUDY SPRING STEEL™
35 5221 CVD UNIVERSAL DRIVE SHAFT - HUDY SPRING STEEL™
35 5237 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
35 5250 ALU WHEEL AXLE - BLACK COATED (2)
35 7250 STEEL PIVOT BALL 13.9 MM (2)
35 7252 ALU ADJUSTING NUT M15x1 (2)
35 7253 BRASS ADJUSTING NUT M15x1 (2) (OPTION)
35 7254 COMPOSITE BALL CUP 13.9 MM (2)
35 7256 ALU SHIM 6x13x1 (2)
90 1504 HEX SCREW SB M5x4 (10)
90 3416 HEX SCREW SFH M4x16 (10)
94 0814 HIGH-SPEED BALL-BEARING 8x14x4 BLUE COVERED (2)
94 1319 HIGH-SPEED BALL-BEARING 13x19x4 BLUE COVERED (2)
98 0263 PIN 2.5x13 (10)
98 0317 PIN 3x17 (10)
BAG
2x
Graphite Grease
(HUDY #106210)
352231
357256 357250
352240
941319
355211
355221
352142
352153
352231
352153
352623
352132
980317
355250
901504
357254
357252
940814
355237
980263
353172
903416
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

  
 

  

 
 

  
ASSEMBLED VIEW
2.5mm
➎
➍
➍
➏
➐
➑
➌
3x17
2.5x13
8x14x4
13x19x4
4x16
OPTION
#357253 Brass
Adjusting Nut M15x1

 
 

  

 
 

  