INTRODUCTION
The XRAY XB9 is a modern, high-competition premium luxury racing 1/8
nitro buggy that is the epitome of high-performance and fine distinctive
design. Your XB9 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 XB9.
XB9 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.
CUSTOMER SUPPORT
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 info@teamxray.com. 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
The XRAY XB9 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 XB9 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 info@teamxray.com.
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.
XRAY Europe
K Výstavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: +421-32-7401100
Fax: +421-32-7401109
Email: info@teamxray.com
XRAY USA
RCAmerica, 2970 Blystone Lane, Suite 109
Dallas, Texas 75220
USA
Phone: (800) 519-7221 * (214) 744-2400
Fax: (214) 744-2401
Email: xray@rcamerica.com
Failure to follow these instructions will be considered as abuse and/or neglect.
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.
To prevent any serious personal injury and/or damage to property, please be
responsible when operating all remote controlled models.
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.
2
• 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.
• 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!
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.
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.
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 info@teamxray.com, or contact the XRAY distributor in your country.
WARRANTY
XRAY guarantees this model kit to be free from defects in both material and
workmanship within 30 days of purchase. The total monetary value under warranty
will in no case exceed the cost of the original kit purchased. This warranty does not
cover any components damaged by use or modification or as a result of wear. Part
or parts missing from this kit must be reported within 30 days of purchase. No part
or parts will be sent under warranty without proof of purchase. Should you find a
defective or missing part, contact the local distributor. Service and customer support
will be provided through local hobby store where you have purchased the kit,
therefore make sure to purchase any XRAY products at your local hobby store. This
model racing car is considered to be a high-performance racing vehicle. As such
this vehicle will be used in an extreme range of conditions and situations, all which
may cause premature wear or failure of any component. XRAY has no control over
usage of vehicles once they leave the dealer, therefore XRAY can only offer warranty
against all manufacturer‘s defects in materials, workmanship, and assembly at point
of sale and before use. No warranties are expressed or implied that cover damage
caused by what is considered normal use, or cover or imply how long any model cars‘
components or electronic components will last before requiring replacement.
Due to the high performance level of this model car you will need to periodically
maintain and replace consumable components. Any and all warranty coverage
will not cover replacement of any part or component damaged by neglect, abuse,
or improper or unreasonable use. This includes but is not limited to damage from
crashing, chemical and/or water damage, excessive moisture, improper or no
maintenance, or user modifications which compromise the integrity of components.
Warranty will not cover components that are considered consumable on RC vehicles.
XRAY does not pay nor refund shipping on any component sent to XRAY or its
distributors for warranty. XRAY reserves the right to make the final determination of
the warranty status of any component or part.
Limitations of Liability
XRAY makes no other warranties expressed or implied. XRAY shall not be liable for any
loss, injury or damages, whether direct, indirect, special, incidental, or consequential,
arising from the use, misuse, or abuse of this product and/or any product or accessory
required to operate this product. In no case shall XRAY‘s liability excess the monetary
value of this product.
Take adequate safety precautions prior to operating this model. You are
responsible for this model’s assembly and safe operation.
Disregard of the any of the above cautions may lead to accidents, personal
injury, or property damage. XRAY MODEL RACING CARS assumes no
responsibility for any injury, damage, or misuse of this product during
assembly or operation, nor any addictions that may arise from the use
of this product.
All rights reserved.
QUALITY CERTIFICATE
XRAY MODEL RACING CARS uses only the highest quality materials, the best
compounds for molded parts and the most sophisticated manufacturing processes of
TQM (Total Quality Management). We guarantee that all parts of a 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.
3
SYMBOLS USED
Part bags used
Assemble in the
specified order
➊ ➋ ➌
Cut off shaded
portion
Use special
tool
Assemble left and
right sides the
same way
Assemble front
and rear the same
way
Pay attention
here
Apply instant
glue
2x
L=R
Cut off
remaining
material
Assemble as
many times
as specified
(here twice)
Time
Use cleaner
Tighten screw
gently
Apply oil
CA
Apply grease
Apply
threadlock
Follow tip here
Follow Set-Up
Book
OIL
Ensure smooth
non-binding
movement
Use pliers
TOOLS REQUIRED
Phillips 5.0mm
(HUDY TOOLS)
17mm Wheel Nut Tool
(HUDY #107570)
Flywheel Tool
(HUDY #182015)
Special Tool for all turnbuckles,
nuts (HUDY #108090)
Cross wrench
(HUDY #107581)
Needle Nose Pliers
(HUDY #189020)
Snap Ring Pliers
(HUDY #189040)
Scissors
(HUDY #188990)
Body Reamer
(HUDY #107600)
or
(HUDY #107601)
Allen 1.5 / 2.0 / 2.5mm
(HUDY TOOLS)
ARM REAMER 3mm/4mm
(HUDY TOOLS)
Socket 5.0 / 5.5mm
(HUDY TOOLS)
Side Cutters
(HUDY #189010)
Hobby Knife
TOOLS & EQUIPMENT INCLUDED
Silicone Shock Oil
Silicone Diff Oil
Air Filter Oil
Graphite Grease
(HUDY #106210)
EQUIPMENT REQUIRED
Transmitter
Receiver
.21 Engine
Steering and
Throttle Servos
Receiver Pack
4
Manifold
Starter Box & Battery Pack
Glow Plug Igniter
Battery Charger
Transmitter Batteries
Fuel
Lexan™ Paint
Exhaust
Threadlock
CA Glue
XB9 TECH TIPS
TIP FRONT & REAR DIFF GEAR MESH ADJUSTMENT
Before filling in the differentials with oil we suggest that you first 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.
The location of the shim(s) depends on whether you are trying to close or open the gap:
optionAL shim
included shim
To close a wide gap
For easier gear mesh adjustments, optional S13 x 0.2
shims are used. These shims can be placed behind the
bearing which is quicker.
Close a wide gap
To close a wide gap:
add 1 or 2 shims against diff spur gear
To close a wide gap:
add 1 or 2 shims against diff
spur gear
insert shim(s) here
#962080 WASHER S 8 x 0.1 mm (10)
#962081 WASHER S 8 x 0.2 mm (10)
962080
S 8x0.1
#962130
WASHER
962081
S 13 x 16 x 0.2 mm (10)
S 8x0.2
To open a narrow gap
Open a narrow gap
insert shim(s) here
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
To open a narrow gap:
add 1 or 2 shims on the other side of the diff, away
from spur gear
TIP DRIVE SHAFT PINS SERVICING
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.
Do not use drive shafts when
the pins are worn.
TIP
Press in new pins and
regularly inspect for wear.
For easy and comfortable drive pin replacements use
#106000 HUDY Drive Pin Replacement Tool.
To replace the worn pins use only the
premium HUDY drive pins #106050.
GRAPHITE PARTS PROTECTION Follow this tech tip to protect the graphite parts.
Protect all XB9
Graphite Parts:
• Front shock tower
• Rear shock tower
• Steering plate
TIP
Press out the worn pins.
Fine sandpaper
Use fine sandpaper
to sand smooth the
edges of all graphite
parts.
Apply CA glue to all edges
of the graphite parts.
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.
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 finished joint.
Loosen and remove screw.
5
1. FRONT & REAR DIFFERENTIALS
355063
940816
964030
355020
971060
355090
980212
355030
971060
355080
903312
964060
940816
355040
OPTIONAL
355063
• 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
Active front diff
#355104
BAGS
35 5002
35 5020
35 5030
35 5040
35 5063
35 5080
35 5090
2x
XB9 FRONT/REAR DIFFERENTIAL - SET
DIFFERENTIAL CASE
STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
FRONT/REAR DIFF LARGE BEVEL GEAR 40T - HUDY STEEL
F/R DIFF OUTDRIVE ADAPTER - LIGHTW. - HUDY SPRING STEEL™ (2)
DIFF PIN (2)
DIFF GASKET (4)
90 3312
94 0816
96 4030
96 4060
97 1060
98 0212
HEX SCREW SFH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
WASHER S 3.5x12x0.2 (10)
WASHER S 6x18x0.2 (10)
SILICONE O-RING 6x1.5 (10)
PIN 2x11.6 (10)
F=R
Graphite Grease
(HUDY #106210)
FRONT/REAR DIFF LARGE BEVEL GEAR
#355040
DIFF LARGE BEVEL GEAR 40T (STANDARD)
#355038
DIFF LARGE BEVEL GEAR 38T (OPTION)
➏
940816
➎
BB 8x16x5
➊
Graphite Grease
(HUDY #106210)
➍
➋
STEP ➎➏ DETAIL
964060
S 6x18x0.2
➌
971060
O 6x1.5
980212
P 2x11.6
Use HUDY Ball-Bearing
Grease for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
➎
➏
DIFFERENTIAL GEARS
6
FRONT & REAR DIFFERENTIALS
2x
F=R
➌
940816
Graphite Grease
(HUDY #106210)
BB 8x16x5
Graphite Grease
(HUDY #106210)
➋
STEP ➎ DETAIL
➍
➊
Use HUDY Ball-Bearing
Grease for servicing:
964060
S 6x18x0.2
#106220 - Standard
#106221 - Extra
#106222 - Premium
➎
971060
O 6x1.5
➏
980212
P 2x11.6
VERY IMPORTANT!
Use these silicone oils included in the kit for initial settings:
Front diff: 5000cSt / Rear diff: 2000cSt
INCORRECT
CORRECT
903312
OIL
Fill the differentials
with oil just above the
satellite gears.
SFH M3x12
IMPORTANT!
Do not overfill the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.
964030
S 3.5x12x0.2
To enure you have the same amount of oil from rebuild to rebuild, do the following:
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
OIL
Front diff:
DIFFERENTIAL OIL
Silicone oil 5000cSt
Fill just above the
satellite gears.
Rear diff:
Silicone oil 2000cSt
Fill just above the
satellite gears.
43.65g
40.95g
OIL
40.95g + 2.7g = 43.65g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40.95g).
OIL
Tighten the screws equally
2. Slowly pour oil into the diff and watch
the weight. Add 2.7g of oil into the diff. The
approximate weight of the diff+oil is 43.65g.
Finish tightening in this order
➊
➌
32.6~32.7 mm
➍
➋
After assembly the differentials should have a length of 32.6~32.7 mm
measured from the ends of the installed ball-bearings. If differentials are
longer, retighten the 4 screws holding the crown gears.
7
CENTER DIFFERENTIAL
355071
964060
940816
964030
971060
355020
355090
980212
355030
355080
971060
940816
355050
903312
355071
BAG
35
35
35
35
35
35
35
90
5012
5020
5030
5050
5071
5080
5090
3312
XB9 CENTRAL DIFFERENTIAL - SET
DIFFERENTIAL CASE
STEEL DIFF BEVEL & SATELLITE GEARS (2+4)
CENTER DIFF SPUR GEAR 46T
CENTER DIFF OUTDRIVE ADAPTER - LIGHTWEIGHT - HUDY STEEL (2)
DIFF PIN (2)
DIFF GASKET (4)
HEX SCREW SFH M3x12 (10)
94
96
96
97
98
0816
4030
4060
1060
0212
HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2)
WASHER S 3.5x12x0.2 (10)
WASHER S 6x18x0.2 (10)
SILICONE O-RING 6x1.5 (10)
PIN 2x11.6 (10)
➏
940816
BB 8x16x5
CENTER DIFF SPUR GEAR
#355048 48T (OPTION)
#355049 47T (OPTION)
#355050 46T (STANDARD)
#355051 45T (OPTION)
#355052 44T (OPTION)
➍
Graphite Grease
(HUDY #106210)
➊
964060
Graphite Grease
(HUDY #106210)
➎
➋
S 6x18x0.2
STEP ➎ ➏ DETAIL
971060
O 6x1.5
980212
P 2x11.6
➌
Use HUDY Ball-Bearing
Grease for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
➎
➏
DIFFERENTIAL GEARS
8
CENTER DIFFERENTIAL
➌
➋
Graphite Grease
(HUDY #106210)
940816
BB 8x16x5
Graphite Grease
(HUDY #106210)
➊
➍
964060
STEP ➎ DETAIL
Use HUDY Ball-Bearing
Grease for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
➏
S 6x18x0.2
➎
971060
O 6x1.5
980212
P 2x11.6
VERY IMPORTANT!
Use the following silicone oil included in the kit for initial setting:
Center diff: 5000cSt
INCORRECT
CORRECT
903312
Do not overfill the differential.
If there is too much oil in the
differential, it may leak after
it cools down after use.
OIL
SFH M3x12
IMPORTANT!
Fill the differentials
with oil just above
the satellite gears.
964030
S 3.5x12x0.2
To enure you have the same amount of oil from rebuild to rebuild, do the following:
#107865 HUDY Ultimate Digital Pocket Scale 300g±0.01g
43.65g
40.95g
OIL
Center diff:
DIFFERENTIAL OIL
Silicone oil 5000cSt
Fill to just above the satellite gears.
40.95g + 2.7g = 43.65g
1. Put the diff (without oil) on the scale and
check the weight (approximately 40.95g).
OIL
Tighten the screws equally
2. Slowly pour oil into the diff and watch
the weight. Add 2.7g of oil into the diff. The
approximate weight of the diff+oil is 43.65g.
Finish tightening in this order
➊
➌
32.6~32.7 mm
➍
➋
After assembly the differential should have a length of 32.6~32.7 mm
measured from the ends of the installed ball-bearings. If differential is
longer, retighten the 4 screws holding the spur gear.
9
2. FRONT TRANSMISSION
980314
355425
SHORT
355472
901404
355416
355471
352004
355236
355110
940816
352094
352004
940816
902312
355002
FRONT DIFF
BAG
901404
35 2004
35 2094
35 5110
35 5236
35 5416
35 5425
35 5471
DIFF BULKHEAD BLOCK SET FRONT/REAR
XB9 GRAPHITE FRONT SHOCK TOWER - CNC MACHINED 4MM
BEVEL DRIVE GEAR 12T
XB9 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
XB9 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
XB9 FRONT CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
XB9 DRIVE SHAFT LOCKING RING (2)
902312
35 5472
XB9 DRIVE SHAFT BOOT (2)
90 1404
90 2312
94 0816
98 0314
HEX SCREW SB M4x4 (10)
HEX SCREW SH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 RUBBER SEALED (2)
PIN 3x14 (10)
step
step
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
SHORT CVD drive shaft
SB 4x4
➎
➎
➌
➋
902312
Follow the TECH TIP on page 5
for drive shaft pin servicing
➌
➊
STEP ➎ DETAIL
➎
➍
SH 3x12
Graphite Grease
(HUDY #106210)
➊
The ring can be assembled with hands but
for easy disassembling, we recommend to
use snap ring pliers (HUDY #189040)
➋
Use HUDY Ball-Bearing
Grease for servicing:
➍
#106220 - Standard
#106221 - Extra
#106222 - Premium
940816
BB 8x16x5
STEP ➍ DETAIL
980314
ASSEMBLED VIEW
P 3x14
step
DETAIL
Cut on both front
and rear bulkhead blocks
FRONT DIFF 5000 cSt
Graphite Grease
(HUDY #106210)
10
step
4
Follow the TECH TIP on page 5
to protect graphite parts
REAR TRANSMISSION
355625
LONG
355472
980314
901404
355471
355416
352004
355236
355110
940816
353094
352004
940816
355002
REAR DIFF
BAG
901404
35 2004
35 3094
35 5110
35 5236
35 5416
35 5625
35 5471
DIFF BULKHEAD BLOCK SET FRONT/REAR
XB9 GRAPHITE REAR SHOCK TOWER - CNC MACHINED 3.5MM
BEVEL DRIVE GEAR 12T
XB9 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
XB9 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL™
XB9 REAR CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™
XB9 DRIVE SHAFT LOCKING RING (2)
902312
902312
35 5472
XB9 DRIVE SHAFT BOOT (2)
90 1404
90 2312
94 0816
98 0314
HEX SCREW SB M4x4 (10)
HEX SCREW SH M3x12 (10)
HIGH-SPEED BALL-BEARING 8x16x5 RUBBER SEALED (2)
PIN 3x14 (10)
step
step
SB 4x4
long CVD drive shaft
Push joint against gear to remove gap.
Tighten set screw onto gear flat spot.
➎
➎
➌
➋
902312
Follow the TECH TIP on page 5
for drive shaft pin servicing
➊
➌
Graphite Grease
(HUDY #106210)
➊
The ring can be assembled with hands but
for easy disassembling, we recommend to
use snap ring pliers (HUDY #189040)
➋
Use HUDY Ball-Bearing
Grease for servicing:
940816
➍
#106220 - Standard
#106221 - Extra
#106222 - Premium
BB 8x16x5
980314
STEP ➎ DETAIL
➎
➍
SH 3x12
STEP ➍ DETAIL
ASSEMBLED VIEW
P 3x14
step
DETAIL
step
4
Follow the TECH TIP on page 5
to protect graphite parts
Cut on both front
and rear bulkhead blocks
REAR DIFF 2000 cSt
Graphite Grease
(HUDY #106210)
11
3. REAR SUSPENSION
909395
353327
352314
901408
353371
357212
902318
352314
353115
353316
903308
909372
901305
352004
REAR ANTI-ROLL BARS
901303
333450
352470
#353482
2.2mm (OPTION)
#353483
2.3mm (OPTION)
#353484
2.4mm (STANDARD)
#353485
2.5mm (OPTION)
#353486
2.6mm (OPTION)
#353488
2.8mm (OPTION)
#353490
3.0mm (OPTION)
901312
352470
352460
BAG
12
33 3450
35 2004
35 2314
35 2460
35 2470
35 3115
35 3304
35 3316
35 3327
35 3371
ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
DIFF BULKHEAD BLOCK SET FRONT/REAR
COMPOSITE ECCENTRIC BUSHINGS (2)
PIVOT BALL 5.8 (10)
BALL JOINT 5.8 (8)
XB9 COMPOSITE REAR LOWER SUSPENSION ARM
ALU REAR LOWER SUSP. HOLDERS SET- SQUARE ADJ. ROLL-CENTER
ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER
ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER
SET OF COMPOSITE LOWER ARM SHIMS
35 3484
35 7212
90 1303
90 1305
90 1312
90 1408
90 2318
90 3308
90 9372
90 9395
REAR ANTI-ROLL BAR 2.4MM
LOWER INNER PIVOT PIN F+R (2)
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x5 (10)
HEX SCREW SB M3x12 (10)
HEX SCREW SB M4x8 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SFH M3x8 (10))
SCREW PHILLIPS SS 3.5x22 (10)
SCREW PHILLIPS SS 3.5x45 (10)
REAR SUSPENSION
REAR ARM
L=R
Check for free
movement
➍
RR
➌
909395
SS 3.5x45
Initial position
1
0.5
0
➊
0.5
1
2mm
4x8
➎
Composite eccentric bushings
2mm
909372
SS 3.5x22
➋
➌
➊
901408
RF
DOWNSTOP SETTING
SB M4x8
➍
Initial position
L=R
1
4mm
0.5
0
0.5
1
Composite eccentric bushings
If the suspension arm does not move freely use a
HUDY Arm Reamer to size the holes of the arms
TOE-IN
ANTI-SQUAT
ROLL CENTER
DOWNSTOP
WHEELBASE
track width
All possible mounting
alternatives of eccentric bushings
(HUDY #107634)
ARM REAMER
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
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).
RR
anti-squat
RF
(°)
RR
ROLL-CENTER
RF
(mm)
RR
track width
RF
(mm)
RR
toe-in
RF
(°)
=3°
=0mm
=308
=3°
=4°
=1mm
=306
=4°
=2°
=-1mm
=310
=2°
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.
=2°
=4°
=3°
=5°
=2°
Example: 0(RR) - 0 (RF) = 3°
= 3°
=3°
=1°
=4°
=3°
0(RR) - 0.5 (RF) = 3.5°
= 3.5°
=5°
=1°
0(RR) - 1 (RF) = 4°
= 4°
=3°
13
REAR SUSPENSION
2x
L=R
1.5mm
6mm
901312
SB M3x12
Follow the TECH TIP on page 5 to
install the pivot balls
STEP ➍ DETAIL
901303
SB M3x3
0mm
L=R
901305
SB M3x5
3x3
902318
➍
➋
SH M3x18
➌
3x18
903308
SFH M3x8
➊
3x5
3x8
DETAIL
INITIAL POSITION
2
DETAIL
1
Step ➊
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely
DETAIL
Step ➊ check for free movement
ANTI-ROLL BAR
14
4. REAR SUSPENSION
353160
353521
OFFSET WHEEL AXLES
#355250 0mm (STANDARD)
#355251 +1mm (OPTION)
#355252 +2mm (OPTION)
902318
353559
352632
353521
353170
353152
353131
960030
905314
960030
902320
980263
902322
902310
355221
351301
960030
353351
355237
355211
980317
941319
355250
902318
357331
940814
353370
960030
901504
BAG
35 1301
35 2632
35 3131
35 3152
35 3160
35 3170
35 3351
35 3370
35 3521
35 3559
35 5211
35 5221
35 5237
35 5250
35 7331
90 1504
90 2310
90 2318
90 2320
90 2322
90 5314
94 0814
94 1319
96 0030
BODY POSTS
ALU ADJ. TURNBUCKLE 64MM M5 L/R - SWISS 7075 T6 (2)
REAR UPPERt INNER CAMBER LINK BALL JOINT (2)
REAR UPPER OUTER CAMBER LINK BALL JOINT (2)
MOUNTING BALL 6.8 (4)
PIVOT BALL 6.8 (4)
XB808 COMPOSITE REAR HUB CARRIER - V2
SET OF COMPOSITE REAR HUB CARRIER SHIMS
XB9 REAR WING POSTS
COMPOSITE REAR WING MOUNT BRACE (2)
CVD DRIVE AXLE - HUDY SPRING STEEL™
CVD UNIVERSAL DRIVE SHAFT - HUDY SPRING STEEL™
CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
ALU WHEEL AXLE - HARD COATED (2)
XB808 REAR LOWER OUTER PIVOT PIN SCREW 3MM (2)
HEX SCREW SB M5x4 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SH M3x20 (10)
HEX SCREW SH M3x22 (10)
SCREW PHILLIPS 3.0x14 (10)
HIGH-SPEED BALL-BEARING 8x14x4 BLUE COVERED (2)
HIGH-SPEED BALL-BEARING 13x19x4 BLUE COVERED (2)
NUT M3 (10)
To tighten the setscrew you can also use the
HUDY 17mm Wheel Nut Tool #107570
901504
SB M5x4
2.5x13
L=R
➎
m
2.5m
Graphite Grease
(HUDY #106210)
3x17
➍
➐
8x14x4
➑
➏
ASSEMBLED VIEW
Use HUDY Ball-Bearing
Grease for servicing:
#106220 - Standard
#106221 - Extra
#106222 - Premium
➍
L=R
Follow the TECH TIP on page 5
for drive shaft pin servicing
➊
13x19x4
941319
➋
➌
L=R
2x
98 0263 PIN 2.5x13 (10)
98 0317 PIN 3x17 (10)
L=R
BB 13x19x4
INITIAL POSITION
940814
BB 8x14x4
Important!
When using outside position on the hub, use
only outside position on the arm.
980317 980263
P 3x17
P 2.5x13
TRACK WIDTH
WHEELBASE
When using inside position on the hub, use
only inside position on the arm.
The outside hole offers great stability and is
recommended for bumpy open tracks. Inside
hole offers great amount of steering and is
recommended for flat, technical tracks.
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
2mm
(HUDY #107633)
If the rear upright does not move
freely, use a HUDY Arm Reamer
to resize the hole.
2mm
ARM REAMER
Do not overtighten the self-locking
nut. Overtightening may result in
suspension binding.
Check for free
movement
15
REAR SUSPENSION
Follow the TECH TIP on page 5
to install the pivot balls
Follow the TECH TIP on page 5
to install the pivot balls
CAMBER
RIGHT
THREAD
LEFT
THREAD
LEFT
THREAD
RIGHT
THREAD
deTail
Use tools to
tighten as shown
Special Tool for all
turnbuckles, nuts
(HUDY #108090)
Right thread
Left thread
Left thread
39 mm
39 mm
NOTE
ORIENTATION
INITIAL POSITIONS
3
3 2 1
1
902318
SH M3x18
Right thread
4
2
4
INITIAL POSITIONS
2
3
1
3x18
NOTE ORIENTATION
902322
SH M3x22
3x22
960030
N M3
ROLL CENTER
For stiffer wing mounting use optional
alu wing mount brace #353550.
3x14
902310
905314
SH M3x10
SP 3x14
3x18
960030
N M3
3x14
3x10
INITIAL POSITIONS
902318
SH M3x18
902320
SH M3x20
REAR WING
16
R4 R3
F4 F3
R2 R1
F2 F1
3x20
5. FRONT SUSPENSION
909372
352324
352314
901408
357212
352314
902318
353371
352323
909395
352115
901303
333450
901305
352470
901312
352004
FRONT ANTI-ROLL BARS
#352480 2.0mm (OPTION)
352460
352470
#352482 2.2mm (OPTION)
903308
#352483 2.3mm (OPTION)
#352484 2.4mm (STANDARD)
#352485 2.5mm (OPTION)
#352486 2.6mm (OPTION)
#352488 2.8mm (OPTION)
BAG
33 3450
35 2004
35 2115
35 2304
35 2323
35 2324
35 2314
35 2460
35 2470
35 2484
ANTI-ROLL BAR BALL JOINT 5.8 MM (2)
DIFF BULKHEAD BLOCK SET FRONT/REAR
XB9 COMPOSITE FRONT LOWER SUSPENSION ARM
ALU FRONT LOWER SUSP. HOLDERS SET - SQUARE ADJ. ROLL-CENTER
ALU FRONT LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER
ALU FRONT LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER
COMPOSITE SQUARE ADJ. ROLL-CENTER BUSHINGS (2)
PIVOT BALL 5.8 (10)
BALL JOINT 5.8 (8)
FRONT ANTI-ROLL BAR 2.4MM
35 3371
35 7212
90 1303
90 1305
90 1312
90 1408
90 2318
90 3308
90 9372
90 9395
SET OF COMPOSITE LOWER ARM SHIMS
LOWER INNER PIVOT PIN F+R (2)
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x5 (10)
HEX SCREW SB M3x12 (10)
HEX SCREW SB M4x8 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SFH M3x8 (10))
SCREW PHILLIPS SS 3.5x22 (10)
SCREW PHILLIPS SS 3.5x45 (10)
17
FRONT SUSPENSION
L=R
FRONT ARM
➍
FR
➌
909395
➊
SS 3.5x45
Initial position
➋
1
0.5
0
0.5
1
4x8
➎
Composite eccentric bushings
2mm
➌
2mm
909372
SS 3.5x22
FF
➊
➍
Initial position
DOWNSTOP SETTING
901408
1
0.5
0
0.5
1
SB M4x8
L=R
2.4mm
Composite eccentric bushings
If the suspension arms do not move freely, use
a HUDY Arm Reamer resize the holes.
(HUDY #107634)
ARM REAMER
kick up
ROLL CENTER
DOWNSTOP
WHEELBASE
TRACK WIDTH
All possible mounting alternatives
of eccentric bushings
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
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).
FF
kick-up
FR
FF
(°)
track width
FR
=308
=10°
FF
ROLL-CENTER
FR
(mm)
=306
=0
=11°
=310
=-1
=8°
=10°
=11°
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.
Example:
0(FF) - 0(FR) = 10°
=10°
0.5(FF) - 0(FR) = 10.5°
=12°
1(FF) - 0(FR) = 11°
Total caster = C-Hub caster + Kick up
Kick-up
=1
=9°
=9°
18
(mm)
C-Hub Caster
8°
9°
10°
11°
12°
10°
18°
19°
20°
21°
22°
12°
20°
21°
22°
23°
24°
14°
22°
23°
24°
25°
26°
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
= 10° by the C-hub caster. The combination of both represents
the total caster angle. The XRAY XB9 includes a 10° caster
= 10.5° block as stock, but 12° and 14° C-hub caster blocks can be
purchased as options.
= 11°
FRONT SUSPENSION
2x
L=R
1.5mm
6mm
901312
SB M3x12
Follow the TECH TIP on page 5
to install the pivot balls
STEP ➍ DETAIL
901303
0mm
SB M3x3
L=R
901305
SB M3x5
3x3
➍
➋
902318
SH M3x18
➌
3x18
903308
SFH M3x8
➊
3x5
3x8
DETAIL
Step ➊
Loosen the 3x5 setscrew if
the anti-roll bar does not
turn freely
DETAIL
Step ➊ check for free movement
ANTI-ROLL BAR
19
6. FRONT SUSPENSION
960030
352151
353160
902318
352622
960030
352151
352222
352181
352262
352212
902325
353170
355221
980263
902414
902418
355211
980317
941319
355250
940814
902418
BAG
901504
SB M5x4
352252
FRONT UPPER ARM BALL JOINT (2)
STEEL ARM BUSHING (2)
COMPOSITE CASTER BLOCK 10° RIGHT
COMPOSITE CASTER BLOCK 10° LEFT
COMPOSITE STEERING BLOCK RIGHT
COMPOSITE STEERING BLOCK LEFT
STEEL STEERING BUSHING (2)
ALU ADJ. TURNBUCKLE M5 L/R 58 MM - SWISS 7075 T6 (2)
MOUNTING BALL 6.8 (4)
PIVOT BALL 6.8 (4)
CVD DRIVE AXLE - HUDY SPRING STEEL™
CVD UNIVERSAL DRIVE SHAFT - HUDY SPRING STEEL™
CASTER BLOCKS
#352212 10° - RIGHT (STANDARD)
#352213 12° - RIGHT (OPTION)
#352214 14° - RIGHT (OPTION)
#352222 10° - LEFT (STANDARD)
#352223 12° - LEFT (OPTION)
#352224 14° - LEFT (OPTION)
OFFSET WHEEL AXLES
#355250 0mm (STANDARD)
#355251 +1mm (OPTION)
#355252 +2mm (OPTION)
352299
901504
35 2151
35 2181
35 2212
35 2222
35 2252
35 2262
35 2299
35 2622
35 3160
35 3170
35 5211
35 5221
355237
35 5237
35 5250
90 1504
90 2318
90 2325
90 2414
90 2418
94 0814
94 1319
96 0030
98 0263
98 0317
CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
ALU WHEEL AXLE - HARD COATED (2)
HEX SCREW SB M5x4 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SH M3x25 (10)
HEX SCREW SH M4x14 (10)
HEX SCREW SH M4x18 (10)
HIGH-SPEED BALL-BEARING 8x14x4 BLUE COVERED (2)
HIGH-SPEED BALL-BEARING 13x19x4 BLUE COVERED (2)
NUT M3 (10)
PIN 2.5x13 (10)
PIN 3x17 (10)
To tighten the setscrew you can also
use the HUDY 17mm Wheel Nut Tool
#107570
2x
980263
2.5x13
P 2.5x13
➋
Follow the TECH TIP on page 5
for drive shaft pin servicing
➌
➊
m
2.5m
13x19x4
Marked “R“
Graphite Grease
(HUDY #106210)
3x17
941319
BB 13x19x4
➍
➐
8x14x4
Use HUDY Ball-Bearing
Grease for servicing:
➎
#106220 - Standard
#106221 - Extra
#106222 - Premium
➏
940814
BB 8x14x4
DO NOT
OVERTIGHTEN
➌
Marked “R“
➑
➋
➊
Check for free
movement
Marked “R“
DO NOT
OVERTIGHTEN
➌
902414 980317
SH M4x14
P 3x17
ASSEMBLED VIEW
CASTER
TRACK WIDTH
20
Marked “L“
➊
The standard caster block features
10° caster angle and together with
the 10° angle of the chassis creates
a total 20° caster.
FRONT SUSPENSION
RIGHT ASSEMBLY
L=R
LEFT ASSEMBLY
902418
SH M4x18
➋
DO NOT
OVERTIGHTEN
Check for free movement
➌
➊
DO NOT OVERTIGHTEN
➌
deTail
LEFT
THREAD
RIGHT
THREAD
Use tools to tighten as shown
LEFT
THREAD
RIGHT
THREAD
Follow the TECH TIP on page 5
to install the pivot balls
Right thread
37.3 mm
Left thread
Follow the TECH TIP on page 5
to install the pivot balls
Left thread
37.3 mm
Right thread
CAMBER
NOTE ORIENTATION
Adjustment block towards outside
L=R
902318
SFH M3x18
3x18
902325
NOTE ORIENTATION
Adjustment block towards outside
SH M3x25
960030
N M3
3x25
L=R
3
1
2
2
INITIAL POSITION
3
1
ROLL CENTER
21
FRONT & REAR ASSEMBLY
902316
353088
960030
351200
960030
351200
903412
903312
351106
BAG
903412
SFH M4x12
22
35 1106
35 1200
35 3088
XB9 ALU CHASSIS - HARDCOATED SWISS 7075 T6 (3MM)
FRONT & REAR BUMPER - V2
COMPOSITE REAR BRACE - V2
903412
90 2316
90 3312
90 3412
96 0030
HEX SCREW SH M3x16 (10)
HEX SCREW SFH M3x12 (10)
HEX SCREW SFH M4x12 (10)
NUT M3 (10)
FRONT & REAR ASSEMBLY
902316
SH M3x16
SH 3x16
903312
SFH M3x12
960030
N M3
SFH 3x12
903412
SFH M4x12
DETAIL
23
7. STEERING
940610
903314
902310
351301
960030
352502
352088
902308
903308
903320
960030
352577
303122
352665
303123
351349
352652
961032
903310
960030
960030
352664
352611
903312
903320
352664
903320
352652
940610
903320
352611
352665
352512
352512
352652
352502
940610
352576
960030
352502
971120
903410
BAG
30 3122
30 3123
35 1301
35 1349
35 2088
35 2502
35 2512
35 2577
35 2576
35 2611
35 2652
35 2664
35 2665
ALU SHIM 3x6x1.0MM (10)
ALU SHIM 3x6x2.0MM (10)
BODY POSTS
COMPOSITE UPPER PLATE
XB9 COMPOSITE FRONT BRACE
XB9 SERVO SAVER COMPLETE SET
XB9 COMPOSITE SERVO SAVER
XB9 GRAPHITE STEERING PLATE
STEERING PLATE BUSHING (2)
ADJ. TURNBUCKLE M4 L/R 51 MM - HUDY SPRING STEEL (2)
BALL STUD 6.8MM (4)
COMPOSITE STEERING BALL JOINT 6.8MM (2)
COMPOSITE RELIEF STEERING BALL JOINT 6.8MM (2)
step
90 2308
90 2310
90 3308
90 3310
90 3312
90 3314
90 3320
90 3410
94 0610
96 0030
96 1032
97 1120
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SFH M3x8 (10)
HEX SCREW SFH M3x10 (10)
HEX SCREW SFH M3x12 (10)
HEX SCREW SFH M3x14 (10)
HEX SCREW SFH M3x20 (10)
HEX SCREW SFH M4x10 (10)
HIGH-SPEED BALL-BEARING 6x10x3 BLUE COVERED (2)
NUT M3 (10)
WASHER S 3.2 (10)
SILICONE O-RING 12x1.6 (10)
step
903308
SFH M3x8
Follow the TECH TIP on page 5
to protect graphite parts
940610
BB 6x10x3
INITIAL PRELOAD SETTING
O 12x1.6
SERVO SAVER
24
6~7mm
971120
CLEANER
step
For servicing use
Bearing Oil
(HUDY #106230)
STEERING
903310
step
SH
3x10
step
SH
3x10
SFH M3x10
SH 3x8
OPTIONAL
XB9 GRAPHITE UPPER PLATE WITH
ALU REINFORCEMENT STAND
#351343
SFH
3x14
SH 3x8
SFH
3x10
903312
903314
SFH M3x12
SFH M3x14
903410 902310
SH M3x10
SFH M4x10
902308
SH M3x8
960030
N M3
4x10
961032
SFH 3x12
S 3.2
Follow the TECH TIP on page 5
to install the pivot balls
Follow the TECH TIP on page 5
to install the pivot balls
LEFT
THREAD
RIGHT
THREAD
RIGHT
THREAD
Right thread
LEFT
THREAD
32.8 mm
Left thread
Left thread
32.8 mm
Right thread
NOTE ORIENTATION
Adjustment block towards outside
303122
SHIM 3x6x1
INITIAL POSITION
3x20
303123
3
2
1
SHIM 3x6x2
903320
SFH M3x20
1mm
alu shim
3
2
1
2mm
alu shim
960030
N M3
3x20
ACKERMANN
BUMP STEER
TOE-IN
NOTE ORIENTATION
Adjustment block towards outside
Check for free
movement
Check for free
movement
25
8. CENTER DIFF & BRAKE
902330
354041
901304
903308
902316
354058
354041
354010
354121
OPTIONAL
GLUED BRAKE PADS SET - ULTRA EFFICIENT(4)
#354131
354130
354110
902316
355012
CENTER DIFF
354010
903308
For less wear of break pads, optional brake pads
with springs can be used.
903412
BAG
35 4010
35 4041
35 4058
35 4110
35 4121
35 4130
CENTER DIFF MOUNTING PLATE - SET
ALU BRAKE CAM POST & ROD (2+2) HARD COATED
COMPOSITE CENTER DIFF MOUNTING PLATE
VENTILATED BRAKE DISK - LASER CUT - PRECISION-GROUND
STEEL BRAKE PAD - LASER CUT (4)
BRAKE PAD FERODO (4)
Steel pad
2x
CA
Fibre pad
(Ferodo™)
2x
Fibre pad
(Ferodo™)
CA
2x
HEX SCREW
HEX SCREW
HEX SCREW
HEX SCREW
HEX SCREW
SB M3x4 (10)
SH M3x16 (10)
SH M3x30 (10)
SFH M3x8 (10)
SFH M4x12 (10)
DETAIL
F=R
Steel pad
Temporarily insert
brake disk between
pads to set correct gap
Roughen steel plates with
sandpaper before gluing
fibre pads
902316
SH M3x16
Fibre pads together
ROUND HOLE
2x
NOTE
ORIENTATION
OVAL HOLE
26
90 1304
90 2316
90 2330
90 3308
90 3412
ROUND HOLE
NOTE
ORIENTATION
OVAL HOLE
NOTE
ORIENTATION
0.5 mm
CENTER DIFF & BRAKE
3mm
901304
SB M3x4
903308
SFH M3x8
0mm
NOTE ORIENTATION
OF ALL PARTS
903308
SFH M3x8
DETAIL
Before inserting 3x30 long screws,
loosen the four flat-head screws in
the upper plate by 1/2 turn. Tighten
all screws after assembly.
902330
SH M3x30
Insert brake disk
between brake pads
NOTE ORIENTATION
903412
SFH M4x12
27
9. FUEL TANK & ENGINE
Manifold
(not included)
906206
908312
Pipe
(not included)
358941
902316
358602
Screw
(not included)
964073 / 964074 / 964075
Engine
(not included)
358540 (OPTION)
358550
358685
CLUTCHBELLS
358585
358561
358680
358711
358531
903310
961025
911410
#358512
12T (OPTION)
#358513
13T (STANDARD)
#358514
14T (OPTION)
#358525
15T (OPTION)
359050
908308
359050
358513
960030
962050
351153
903310
901405
358722
903310
903314
903410
960030
351153
903314
903310
BAG
35 1153
35 8513
35 8531
35 8540
35 8550
35 8561
35 8585
35 8602
35 8680
35 8685
35 8711
XB9 CHASSIS SIDE GUARDS L+R
CLUTCH BELL 13T
FLYWHEEL
FLYWHEEL COLLAR (OPTION)
FLYWHEEL NUT - HUDY SPRING STEEL™
ALU CLUTCH SHOES - LIGHT 1.71g - CNC MACHINED (3)
CLUTCH SPRINGS - HARD (3)
FUEL TANK 120CC - SET - V3
FUEL TANK MOUNTING POST (2)
FUEL TANK MOUNTING GROMMET (4)
ALU ENGINE MOUNT - CNC MACHINED (L+R)
35 8722 EXHAUST WIRE MOUNT SET - LONG
35 8941 COMPOSITE TUBING HOLDER FOR FUEL TANK (2)
35 9050
90 1405
90 2316
90 3310
90 3314
90 3410
90 6206
90 8308
CLUTCH BELL BALL-BEARING 5x10x4 (2)
HEX SCREW SB M4x5 (10)
HEX SCREW SH M3x16 (10)
HEX SCREW SFH M3x10 (10)
HEX SCREW SFH M3x14 (10)
HEX SCREW SFH M4x10 (10)
SCREW PHILLIPS FH 2.2x6 (10)
HEX SCREW (CAP HEAD) 3x8 (10)
3x14
3x10
3x14
3x10
90 8312
91 1410
96 0030
96 1025
96 2050
96 4073
96 4074
96 4075
HEX SCREW (CAP HEAD) 3x12 (10)
HEX SCREW FLANGED SH M4x10 (10)
NUT M3 (10)
WASHER S 2.5 (10)
WASHER S 5x10x1.0 (10)
WASHER S 7x10x0.2 (10)
WASHER S 7x10x0.3 (10)
WASHER S 7x10x0.5 (10)
903310
SFH M3x10
903314
SFH M3x14
3x10
3x10
3x10
multi-flex™
960030
N M3
28
3x14
3x14
multi-flex™
3x14
3x14
3x10
FUEL TANK & ENGINE
908312
SCH M3x12
IMPORTANT!
7x10x0.2 / 0.3 / 0.5
Use appropriate shims to achieve proper
clutchbell endplay
964075
S 7x10x0.5
Use the cone included with your engine,
or use optional XRAY cone #358540
964074
S 7x10x0.3
964073
S 7x10x0.2
When installing the engine, first check that the drive shaft does not
touch the engine. If it does, remove some material from the engine
mount as shown to make some room between engine and shaft.
NOTE ORIENTATION
Tighten the clutch nut using
HUDY tool #107581
908308
SCH M3x8
IMPORTANT
Failure to use these shims
may cause the flywheel
pins to come out after
some time.
359050
BB 5x10x4
Hold the flywheel using HUDY Flywheel
Tool #182015
These bearings must still be regularly serviced and
replaced when worn out.
961025
S 2.5
11~
11.2
2.5
mm
962050
S 5x10x1
CLUTCH SPRINGS
CLUTCH SHOE
Note the orientation of the clutch shoes.
The short side of spring must be in the
groove of the flywheel nut.
5x10
3x8
DETAIL
911410
SHF M4x10
EXTREMELY IMPORTANT
Adjust engine position to
achieve proper gear mesh
GEARING
GEAR MESH adj.
It is very important that your XB9 has properly-adjusted gear mesh. Adjust the gear
mesh so there is adequate (or slightly larger) space between the spur gear and
clutchbell teeth. Adjust the gear mesh by sliding the engine mounts in the slots of the
chassis. You should be able to rock one gear back and forth slightly while holding the
other one firmly. Be sure to check the gear mesh all the way around the spur gear.
Tighten the screws once the engine alignment and gear mesh are correct, and then
re-check the gear mesh to ensure the engine mounts did not move.
29
FUEL TANK & ENGINE
3x16
DETAIL
The fuel tank has the bigger fuel volume and includes optional tank inserts for decreasing
the volume of the tank. Using the inserts allows you to adjust the volume of fuel inside the
tank; this works in conjunction with variables such as fuel filter capacity and/or length of
fuel line to ensure you have the legal fuel volume limit for racing.
Tube holders are easily connected to the fuel tank by screws. Using screws is much more
secure than using glue to attach the holders to the fuel tank.
902316
#907258
SH M3x16
2.5x8mm
2cc
2.2x6
1cc
903310
SFH M3x10
906206
SFP 2.2x6
2cC fuel tank insert
907258
The larger insert decreases the
fuel tank volume by 2cc, and is
recommended for use when the
fuel filter is used.
SP 2.5x8
NOTE ORIENTATION
3x10
1CC fuel tank insert
The smaller insert decreases the
fuel tank volume by 1cc.
NOTE ORIENTATION
NOTE: The fuel tank insert can be easily mounted to the bottom of the fuel tank using the
provided screw, when the fuel tank cap is opened fully.
DETAIL
Bend the exhaust wire as
appropriate to fit the muffler.
903410
SFH M4x10
901405
SB M4x5
cut away FOR MUFFLER OUTLET
Make 3mm holes as appropriate to mount
muffer support/protector.
Use HUDY Body Reamer
#107600
DETAIL
not included
30
10. RADIO CASE
902310
356003
902306
(not included)
Servo Screw
(not included)
Personal transponder
(not included)
902312
902314
356200
352460
302611
306310
356003
352670
902310
960030
902312
902314
Servo Grommet
(not included)
Receiver
(not included)
902312
356003
356003
356003
Steering Servo
(not included)
Servo Grommet
(not included)
Receiver battery
(not included)
Throttle Servo
(not included)
356120
356120
356120
356120
903412
903412
BAG
10
30 2611
30 6310
33 6120
35 2460
35 2670
35 6003
35 6050
35 6120
35 6200
ADJ. TURNBUCKLE L/R 35 MM - HUDY SPRING STEEL (2)
ANTENNA TUBE (2)
COMPOSITE STEERING SERVO HOLDER - SET - V2
PIVOT BALL 5.8 (10)
SERVO BALL JOINT 5.8MM (4)
XB9 RADIO CASE SET
BATTERY CABLE WITH SWITCH (OPTION)
STEERING SERVO MOUNT - SET
BRAKE/THROTTLE ARMS & STEERING SERVO ARMS - SET
Follow the TECH TIP on page
5 to install the pivot balls
step
Right
thread
38 9135
90 2310
90 2312
90 2314
90 3412
96 0030
CONNECTING CABLE RECEIVER/BATT. PACK (OPTION)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x12 (10)
HEX SCREW SH M3x14 (10)
HEX SCREW SFH M4x12 (10)
NUT M3 (10)
step
Left
thread
902312
SH M3x12
Follow the TECH TIP on page
5 to install the pivot balls
NOTE
ORIENTATION
Right thread
16 mm
Use appropriate servo arm:
Left thread
The length of the linkages varies according to the type of servo.
K - KO Propo, JR, Sanwa, Multiplex
H - Hitec
F - Futaba
31
RADIO CASE
Servo screw
step
3x12
Plug the connectors into
the receiver in Step 2
3x14
902312
SH M3x12
NOTE
ORIENTATION
902314
SH M3x14
step
Use foam to cushion the
inside of the radio case so
the receiver and battery
cannot vibrate or move.
3x10
cut
3x12
902310
3x10
SH M3x10
Optional
switch #356050
902312
SH M3x12
907206
SP M2x6
2x6
When receiver switch is
used, use hobby knife
to CAREFULLY remove
the material from the
cover and mount the
swith.
OPTIONAL
Brass Chassis Weight Front 60g
# 351180
If you use LiPo batteries - which are much lighter than standard
batteries - we recommend using optional weights to achieve the
proper weight balance for the car.
Personal transponder (not included)
902306 Screws (not included)
DETAIL
3x6
Personal transponder can be placed on
the top od the radio box or inside of the
radio box
903412
SFH M4x12
902314
SH M3x14
960030
N M3
32
Alternative 1
When the transponder is placed at
the top of the radio box, cut out some
material from the radio box in order
to allow the transponder wire to come
inside.
.........................................
Alternative 2
Place the transponder inside of the
radio box by using double side tape.
3x14
Note orientation of servo arm when servo is at neutral
11. SHOCK ABSORBERS
358052
358042
358041
358042
960026
10 holes/ø1.1mm
358040
8 holes/ø1.2mm
358262
8 holes/ø1.3mm
358083
6 holes/ø1.2mm
358223
358032
358033
358162
6 holes/ø1.4mm
6 holes/ø1.3mm
970100
PISTONS DETAIL
358019
970180
358123
971034
358074
358142
358284
358150
FRONT SPRINGS
#358182 C=0.65 - White
(OPTION)
#358183 C=0.70 - Grey
(OPTION)
#358184 C=0.75 - Silver (STANDARD)
#358185 C=0.80 - Grey-Blue (OPTION)
#358186 C=0.86 - Blue
(OPTION)
#358187 C=0.92 - Violet
(OPTION)
#358188 C=0.98 - Purple
(OPTION)
REAR SPRINGS
#358282 C=0.47 - White
(OPTION)
#358283 C=0.50 - Grey
(OPTION)
#358284 C=0.53 - Silver (STANDARD)
#358285 C=0.57 - Grey-Blue (OPTION)
#358286 C=0.61 - Blue
(OPTION)
#358287 C=0.65 - Violet
(OPTION)
#358288 C=0.70 - Purple
(OPTION)
358020
358184
352460
BAGS
11.1
960026
N M2.5
35 2460
35 8019
35 8020
35 8032
35 8033
35 8040
35 8041
35 8042
35 8052
35 8074
35 8083
35 8123
PIVOT BALL 5.8 - V3 (10)
XB9 COMPOSITE SET OF SHIMS FOR SHOCKS (2)
XB9 COMPOSITE SHOCK PARTS
XB9 SHOCK PISTON SET 8-HOLE (1.2; 1.3) 10-H. (1.1MM)
XB9 COMPOSITE SHOCK 6-HOLE PISTON SET (1.2; 1.3; 1.4MM)
HARDENED SHOCK SHIMS (4)
STEEL SHOCK BUSHING (2)
COMPOSITE SHOCK BUSHING & SHIM (2+2)
ALU SHOCK CAP NUT - HARD COATED (2)
XB9 FOLDING SHOCK BOOT (4)
SHOCK RUBBER MEMBRANE RIBBED (4)
XB9 ALU FRONT SHOCK BODY - HARD COATED (2)
2x Front shocks (short)
2x REAR shocks (long)
.......................................................
CORRECT
TIGHTEN GENTLY
S 2.5x6x0.5
O 3.4x2
XB9 ALU SHOCK BODY NUT FOR SHOCK BOOT (2)
ALU SHOCK BODY ADJ. NUT (2)
XB9 FRONT SHOCK SHAFT (2)
XRAY FRONT SPRING SET C=0.75 - SILVER (2)
XB9 ALU REAR SHOCK BODY - HARD COATED (2)
XB9 REAR SHOCK SHAFT (2)
XRAY REAR SPRING SET C=0.53 - SILVER (2)
NUT M2.5 - SHORT (10)
O-RING 10 x 1.5 (10)
O-RING 18 x 1.8 (10)
SILICONE O-RING 3.5x2 (10)
NOTE
ORIENTATION
358040
971034
35 8142
35 8150
35 8162
35 8184
35 8223
35 8262
35 8284
96 0026
97 0100
97 0180
97 1034
8 holes
ø1.2mm
pistons
8 holes
ø1.3mm
pistons
BAG
BAG
The self-locking nut is gently
tightened. The piston remains
undistorted and fits inside the
shock body perfectly, ensuring
smooth movement of the piston.
INCORRECT
Do not overtighten
There are two different thickness shims, use them as
shown. Use the same procedure when building both front
and rear shocks.
The self-locking nut is
overtightened, causing distortion
of the piston. This will negatively
affect the free movement of the
piston in the shock body.
Thick Shim
O-ring
11.1
970100
O 10x1.5
FRONT
SHOCK
REAR
SHOCK
(SHORT)
(LONG)
Thin Shim
O-ring
Grip the shock rod at top of
exposed threads with side
cutting pliers. Be careful not
to damage the shock rod.
SHOCK DAMPING
SHOCK pistons
INCORRECT
INCORRECT
CORRECT
DETAIL
CUTAWAY VIEW
33
SHOCK ABSORBERS
EXTREMELY IMPORTANT
2x FRONT SHOCKS
SHORT SHOCK ROD
SHORT SHOCK BODY
1.2mm
PISTON
970180
O 18x1.8
2x REAR SHOCKS
LONG SHOCK ROD
LONG SHOCK BODY
1.3mm
PISTON
2x Front shocks
INCORRECT
CORRECT
Do not push the shock rod straight
through the lower shock body
assembly; O-ring damage may result.
Twist the shock rod through the
lower shock body assembly.
DETAIL
2x REAR shocks
CUTAWAY VIEW
INCORRECT
1~1.5 mm
INCORRECT
Grip the shock rod at top of exposed
threads with side cutting pliers. Be
careful not to damage the shock rod.
CORRECT
DEFAULT SHOCK REBOUND SETTING 0% (low rebound)
Follow the TECH TIP on page
5 to install the pivot balls
Follow the steps below to set the shock rebound to the default setting of 0%.
Front (short)
2x Oil 500cSt
2x REAR (long)
Oil 600cSt
HALF TIGHTEN
50%
SHOCK OIL
TIGHTEN FULLY
100%
detail
3~5x
UP & DOWN
34
➊
➋
➌
➍
➎
➏
➐
Extend the shock shaft
completely. Fill the shock
body with the shock oil. For
the FRONT shocks (short)
use 500cSt oil. For the
REAR shocks (long) use
600cSt oil.
Move the shock shaft up and
down a few times to release
the air bubbles trapped
beneath the piston.
Orient the filled shock
vertically for several
minutes with the shock
shaft fully extended. The
remaining air bubbles will
release.
Install the shock membrane
into the groove in the
upper shock cap.
Gently place the shock cap
assembly onto the filled
shock body. Excess oil will
spill from the shock. Screw
the shock cap onto the
body by only a few turns.
Gently push the shock shaft
completely into the shock
body. Excess oil will flow
through the hole in the
shock cap.
Keep the shock shaft
pushed in the shock body
and tighten the shock cap
completely.
The rebound will be at
approximately 0%.
SHOCK ABSORBERS
approx. 5mm
2x Front shocks
2x REAR shocks
FRONT shock
PRELOAD
SHORT FRONT SHOCKS
LONG REAR SHOCKS
REAR shock
PRELOAD
SHORT SPRING
LONG SPRING
IMPORTANT!
0~2mm
SPRING RATE
SELECTION
SHOCK PRELOAD
RIDE HEIGHT
IMPORTANT!
Both front shocks
must be the same
overall length.
IMPORTANT!
Both rear shocks
must be the same
overall length.
FRONT & REAR shocks
ALTERNATE SHOCK REBOUND SETTING (50% and 100%)
The default shock rebound setting is 0% (as described on page 34).
Alternatively, you may set the shock rebound setting to 50% or 100% as described below. Remove the shock springs before performing shock rebound adjustment.
SETTING THE SHOCK REBOUND TO 50% (MEDIUM REBOUND)
HALF TIGHTEN
50%
REMOVE SHOCK CAP
TIGHTEN FULLY
100%
50%
50%
➊
➋
➌
➍
➎
➏
Extend the shock shaft completely
and remove the shock cap.
Fill the shock body with shock
oil up to the top. Make sure to
use same viscosity shock oil as
is in the shock.
Orient the filled shock
vertically for several minutes
with the shock shaft fully
extended. The remaining air
bubbles will release.
Gently place the shock cap
assembly onto the filled shock
body. Excess oil will spill from
the shock.
Push the shock shaft 50% into
the shock body. Excess oil will
bleed thgrough the hole in the
shock cap.
Keep the shock shaft pushed
50% into the shock body
and tighten the shock cap
completely.
The rebound will be at
approximately 50%.
SETTING THE SHOCK REBOUND TO 100% (HIGH REBOUND)
TIGHTEN FULLY
100%
REMOVE SHOCK CAP
100%
➊
➋
➌
➍
Extend the shock shaft completely and remove
the shock cap.
Fill the shock body with shock oil up to the top.
Make sure to use same viscosity shock oil as is
in the shock.
Orient the filled shock vertically for several
minutes with the shock shaft fully extended.
The remaining air bubbles will release.
Gently place the shock cap assembly onto the filled
shock body. Keep the shock shaft extended 100% from
the shock body and tighten the shock cap completely.
The rebound will be at approximately 100%.
35
12. FINAL ASSEMBLY
903312
353511-K
358811
358821
356510
356401
901303
901303
358841
903314
356401
902308
358821
358950
961022
901303
960030
358047
960030
356401
356401
902310
356401
356401
356200
358930
359400
358950
961022
358204
902318
960030
359809
(not included)
358047
Inserts
(not included)
355260
BAG
12
902318
Tires
(not included)
35 3511-K
35 3511
35 3511-Y
35 5260
35 6200
35 6401
35 6510
35 8047
35 8104
35 8204
35 8811
35 8821
35 8841
35 8930
358104
902319
355260
XB9 REAR WING - BLACK
XB9 REAR WING - WHITE (OPTION)
XB9 REAR WING - YELLOW (OPTION)
WHEEL NUT - HARD COATED (2)
BRAKE/THROTTLE ARMS & SERVO ARMS - SET
BRAKE/THROTTLE SYSTEM - SET
CLOSED BALL JOINT 3.9 (4)
STEEL SCREW SHOCK PIVOT BALL WITH HEX (2)
XB9 FRONT SHOCK ABSORBERS + BOOTS COMPLETE SET (2)
XB9 REAR SHOCK ABSORBERS + BOOTS COMPLETE SET (2)
AIR FILTER ELBOW - LOW PROFILE
AIR FILTER BODY & CAP - LOW PROFILE
AIR FILTER FOAM & OIL - LOW PROFILE
FUEL FILTER MOUNT & TUBING HOLDERS
(SHORTER)
35 8950
35 9400
35 9707
35 9809
SILICONE TUBING 1M (2.4 x 5.5MM)
BODY CLIP (10)
XRAY XB9 BODY FOR 1/8 OFF ROAD BUGGY
WHEELS STARBURST - YELLOW (4) (OPTION)
90 1303
90 2308
90 2310
90 2318
90 2319
90 3312
90 3314
96 0030
96 1022
HEX SCREW SB M3x3 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x18 (10)
HEX SCREW SH M3x18 - LEFT THREAD (10)
HEX SCREW SFH M3x12 (10)
HEX SCREW SFH M3x14 (10)
NUT M3 (10)
WASHER S 2.2 (10)
(LONGER)
INITIAL POSITIONS
SH M3x18
4 3
2
NOTE ORIENTATION
902319
L=R
SH M3x18
LEFT thread
1
1
4
2 3
INITIAL POSITIONS
Use standard
M3x18 screw
2 1
960030
FRONT SHOCKS (SHORT)
N M3
3x18
On the front right arm use the silver M3x18
screw - this screw has left thread
SHOCK ABSORBERS
36
To extend the life-time of the front
shock tower, optional steel front
shock tower protector is available.
optional
FRONT SHOCK TOWER STELL PROTECTOR
#352099
FINAL ASSEMBLY
(SHORTER)
902318
(LONGER)
M3x18
43
2
NOTE
ORIENTATION
1
INITIAL POSITIONS
1
4
23
3x25
902319
SH M3x18
LEFT thread
L=R
Use standard
M3x18 screw
960030
N M3
INITIAL POSITIONS
REAR SHOCKS (LONG)
2
On the rear left arm use the silver M3x18
screw - this screw has left thread
3x18
SHOCK ABSORBERS
1
Thread brake rods into plastic
pivots until flush with outer end
901303
SB M3x3
3x14
Bra
ke r
o
Bra
3x10
ke r
o
902310
SH M3x10
Thr
ottle
SHO
d
CUTAWAY VIEW
d
Small gap
rod
Small gap
RT
Tighten screw until snug.
Pivots should move freely.
903314
SFH M3x14
Use servo horn to match your servo
961022
S 2.2
K - KO Propo
F - Futaba
H - Hitec
SILICONE
TUBING
10mm
901303
SB M3x3
Servo screw (not included)
Ensure that the servo is in neutral position
before attaching the servo horn.
37
FINAL ASSEMBLY
NOTE
ORIENTATION
detail
XRAY STARBURST WHEELS
#359808 Pink (OPTION)
#359809 Yellow (OPTION)
903312
SFH M3x12
960030
N M3
CA
To tighten the setscrew you can also use the
HUDY 17mm Wheel Nut Tool #107570
Apply air filter oil and follow the engine
instructions to service the air filter.
902308
SH M3x8
OPTIONAL
AIR FILTER COVER
#358832
Cut the silicone tube depending on engine
and muffler. Use the plastic clips to hold
the tubes together.
silicone tube marked as
green = from fuel tank to carburetor
silicone tube marked as
red = from muffler to fuel tank (top)
Keep fuel line away from
clutchbell and flywheel.
38
To keep the fuel tubes together, use
tubing holders.
THROTTLE LINKAGE ADJUSTMENT
Neutral (Idle)
ADJUST INDIVIDUAL LINKAGES SEPARATELY TO AVOID INTERFERING WITH THE OPERATION OF THE OTHERS
Engine idling
~1mm
0.5mm
• Turn on the transmitter and receiver and set the engine control servo trim to the neutral position.
• Adjust the idle adjustment screw on the carburetor to open approx. 1mm.
• Adjust both the throttle linkage and brake linkages accordingly.
• DO NOT adjust the linkage with the engine running.
Idling Adjustment Screw.
Use to adjust the idle setting of the
carburetor. Do not allow carburetor to
close to less than 1mm.
FULL throttle
• Adjust the servo-horn mounting position for the carburetor to open fully.
• Change the pivot mounting position on the servo horn in case the carburetor is not opening fully or if it is opening excessively.
Or if available on the transmitter, adjust the throttle high end point.
Brake
Brake adjusting knobs:
Upper linkage - rear brake
Lower linkage - front brake
Engine idling
cca 1mm
• Adjust the adjustable collars so the brakes work smoothly.
• If the brakes apply too much or not enough, adjust the adjustable collars accordingly. Or if available on the transmitter, adjust the brake endpoint.
• To tighten brakes, turn collar to thread brake rod INTO pivot.
• To loosen brakes, turn collar to thread brake rod OUT of pivot.
➊ Before cutting and making holes on the body, put the unpainted body on the chassis to confirm the
mounting position and location for holes and cutouts.
➋ Before painting, wash the inside of the body with mild detergent, and then rinse and dry thoroughly.
➌ Mask all windows.
➍ Apply paint masks as appropriate.
➎
➏
➐
➑
Paint the body using paints formulated for polycarbonate bodies.
When the paint is dry, remove the masking.
Carefully cut out the body using appropriate scissors or cutting tools.
When you have finished cutting, peel off the external protective films.
DETAIL
Body Reamer (HUDY #107600)
Ensure to make this rear body
mount hole oval so in the case of
chassis flex after a big jump the
body mount will not tear up the
hole.
39
MULTIFLEX™
XB9 offers revolutionary flex setting possibilities. Depending on the traction, surface, track layout, you can change the flex setting as you need. XB9 has 3 main Multi-Flex™ settings: soft, medium, stiff
SOFT
Use soft setting for low-traction, dusty tracks. The car will create
a lot of traction with this setting but will have less steering and
response compared to stiffer setting.
Screw used
Screw not used
medium
Use medium setting for medium-traction tracks. This setting offers
good balance between steering responsiveness and traction.
Screw used
Screw not used
stiff
Use stiff setting for high-traction tracks where a lot of steering and
car response is required.
Screw used
Screw not used
40
MAINTENANCE
ENGINE OPERATION
Preparing to Operate the Engine
•
•
•
•
Never modify the engine or muffler.
Confirm the position of needle and idling before running. Be sure to run a new engine smoothly.
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.
• The engine may not start or run properly if the air filter is dirty, or choked with sand and dust.
• If the fuel pipe is choked or deteriorates, the engine may not start, and there is danger that fuel will
leak out.
Starting and Running the Engine
Be sure to observe the following starting process. Failure to do so may cause the model car to start suddenly, which may lead to damage or unexpected accidents.
1. Make sure the transmitter and receiver batteries are fully charged.
2. Make sure that your transmitter and receiver are both on the same frequency. If you have a transmitter
with multiple model memory, make sure you have selected the proper profile for your car.
3. Put the car on the starter box and keep the tires from touching the ground.
4. Turn on the transmitter.
5. Turn on the receiver in the car.
6. Make sure the steering servo and engine servos work normally and adjust them correctly.
7. Put fuel in the fuel tank, and close the cap securely.
8. Apply the glow igniter to the engine glowplug.
9. Push the model car onto the starter box to start the engine. (If the engine is new, follow the instruction
manual and be sure to break in the new engine properly).
10.When the engine has started, remove the glow igniter.
11.Follow your engine break-in procedure and tune the engine as appropriate.
Stopping the Engine
Before you stop the engine, try to make sure the engine is at idle first. There are several ways to stop the engine:
• Use a rag to cover the exhaust tip. Be careful! The exhaust is extremely hot so use a thick • Put your hand over the air filter, or squeeze the air filter element to block the airflow.
rag and gloves.
• Press an object (such as a screwdriver handle or shoe) against the rotating flywheel to
• Pinch the fuel tubing to stop the flow of fuel to the carb. Be careful, this can make the
stop its rotation. Be very careful, and do not stick your hand or fingers near the rotating
motor run lean which can damage the motor.
flywheel.
Finishing Operations
1. Stop the engine.
2. Turn off the receiver in the car
3. Turn off the transmitter.
Maintenance After Running
Take proper care of your car after running to keep it performing well, and take notice of any damage and wear.
1. Do not leave fuel in the tank.
3. Clean the car and remove all sand, mud, and other debris.
2. Go outside to drain any residual fuel from the exhaust pipe.
4. Use after-run oil in your engine after you have finished running for the day.
SHOCK MAINTENANCE
The most important maintenance task for keeping consistent shock performance is refilling and bleeding them correctly. If built correctly, it will not be necessary
to re-build them often. Replacing warped/hard rubber bladders and o-rings, scarred piston rods, or shaved/split/loose composite upper and lower ball joints are also important.
• For club racing, it is recommended to check the shocks for air inside before each race
and only re-fill and bleed them if necessary. Before each race day, make sure you take
the spring off of each shock, hold it up to your ear, and quickly compress the shock rod
fully into the body while listening for any air making a “whistling” or “squishy” sound as
it passes through the piston holes. If you hear any air, refill and bleed your shocks. For
high-competition racing, it is recommended that the shocks be re-filled and bled before a
large event.
• If building or pairing new shocks, always make sure they are the same length using a
shock length measuring tool and adjust the lower ball joints as needed.
• If installing new rubber bladders, carefully trim the thin excess rubber from the edges of
their lips. Curved body scissors work the best.
• Regularly inspect the amount of dirt on the felt protector in the shocks (if present) and
regularly replace with a new one.
• During regular shock operation, oil naturally gets on the shock shaft and drop-by-drop
slightly gets out of the shock body. Shocks should be inspected regularly after each race,
and oil replaced as required.
BEARING MAINTENANCE
Ball-bearings in an off-road car or truggy must be properly maintained for smooth operation and long lifespan.
Typically, the ball-bearings included in new cars are greased for highest lifespan and as such the drivetrain may not seem to be as free as with lightly-oiled ball-bearings. However, when the
car is run the ball-bearings will become more free and the drivetrain will become very efficient.
There are several types of bearings discussed here: bearings which already come greased from the factory, bearings which must be lubricated using the HUDY Bearing Grease, and then
there are also bearings in the steering system which need to be lubricated with HUDY Bearing Oil.
The following procedures are recommended to clean all of the bearings in your off-road car or truggy. For high-competition racing, we recommended doing this every 3-4 weeks, or before a
major race.
1. Remove the seals on both sides of the bearing (if present). If the seals bend a little and
you can see a kink, carefully flatten the kink out by hand.
2. Spray the seals with motor cleaner and blow dry with compressed air.
3. Spray the bearing on both sides with motor cleaner.
4. Spin the bearing while it is still wet to dislodge any particles with the cleaner.
5. Spray the bearing on both sides again.
6. Blow both sides of the bearing dry with compressed air to make sure particles come out.
7. Hold the inner part of the bearing with my left thumb/forefinger and spin it to make sure
it spins free without any abnormal vibrations or sounds.
8. Place one drop of bearing oil into each side of the bearing.
9. Replace both seals at the same time by lining them up on each side of the bearing and
lightly pressing them in all the way around the bearings circumference with your thumb
and forefinger. Do not press too hard or use any type of tool, such as a wrench tip, to push
the blue seals in as they will push in too far, bend and cause drag.
If you spin test the bearing after you have re-oiled and sealed it, it will not spin freely for an extended period of time. The lightest of oils may allow it to spin for 1-2 seconds. This is normal
and once you have mounted the bearings in the car again, the drive train will spin freely.
Make sure you use a motor cleaner that does not leave a residue after it dries as this may cause drag and wear in the bearings.
41
Clutch Bearings
To prolong the lifespan of the clutch bearings, they must be regularly cleaned and lubricated (preferably after each run) using a
high-quality grease such as HUDY Bearing Grease. However, after some time the clutch bearings must be replaced with new ones.
Recommended Products
• Use HUDY Bearing Grease to regularly lubricate grease-bearing ball-bearings.
• Use HUDY Bearing Oil to lubricate the bearings of the steering system.
• Use HUDY Bearing Grease to regularly lubricate the clutch bearings.
HUDY #106220
HUDY #106230
HUDY #106222
HUDY #106221
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 #106210
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.
TROUBLESHOOTING GUIDE
Problem
Cause
• Fuel tank is empty or carburetor is not primed
• Bad glowplug or dead glowdriver battery
• Fuel lines, fuel filter, air cleaner, or muffler is clogged
Engine does not start • Engine is flooded due to over‑priming
• Carburetor is not adjusted properly
• Throttle servo linkage not adjusted properly
Engine starts but
then stalls
•
•
•
•
Fuel tank is empty
Fuel lines, fuel filter, air cleaner, or muffler is clogged
Carburetor is not adjusted properly
Engine has overheated
• Carburetor is not adjusted properly
Bad reaction and
• Fuel lines, fuel filter, air cleaner, or muffler is clogged
response from engine • Low fuel pressure from muffler
Car is hard to
control
Steering does not
work properly
Handling problems
42
• Weak transmitter and/or receiver batteries
• Low reception from radio antennas
• Servo linkages not adjusted properly
• Weak transmitter and/or receiver batteries
• Bent linkages or driveshafts
• Loose steering components
• Drivetrain damage
• Shocks are not working properly
• Suspension is binding
• Improper tires
Solution
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Fill fuel tank with fuel and prime
Replace glowplug or recharge/replace glowdriver battery
Clean or replace clogged part(s)
Remove glowplug, turn car over to discharge fuel from cylinder. Test glowplug
and replace if defective
Set idle and main/slow needle adjusting screw to standard starting position
Move throttle servo to neutral position and re‑adjust linkage(s)
Fill fuel tank with fuel
Clean or replace clogged part(s)
Re-adjust idle and main/slow needle adjusting screw
Allow engine to thoroughly cool down and open main needle adjusting screw
30° turn richer (CCW)
Re-adjust main/slow needle adjusting screw
Clean or replace clogged part(s)
Properly install pressure line between muffler and fuel tank
Recharge or replace batteries
Fully extend transmitter and receiver antennas
Move servo to neutral then re-adjust linkage(s)
• Recharge or replace batteries
• Check tightness of steering components and tighten if necessary
• Replace damaged parts
• Rebuild the shocks and replace worn or broken parts
• Make sure suspension moves freely. Replace worn or broken parts
• Use different tires
Steering feels
sluggish or vague
• Suspension is binding
• Damaged steering servo
• Make sure suspension moves freely, and replace worn or broken parts
• Check the steering servo for damage and wear, and replace/repair if necessary
The car does not
drive straight
• Suspension is binding
• Steering trim is off-center
• Wheels are loose
• Damaged steering servo
•
•
•
•
Make sure suspension moves freely, and replace worn or broken parts
Adjust steering trim until car drives straight
Check the make sure the wheel nuts are properly tightened
Check the steering servo for damage and wear, and replace/repair if necessary
SET-UP SHEET
FRONT
RACE
TRACK
CASTER BLOCK
PLASTIC
PLASTIC
UPPER SHOCK POSITION
4 3
KING PIN 5°
CITY /
COUNTRY
FRONT ROLL
CENTER
OFFSET
STANDARD
CONTACT
2
ALU
ALU
NAME
REAR
APPLIED
STEERING BLOCK
1
1
DATE
+2
TRACK
TEMPERATURE / AIR
°F or °C
FINAL POSITION BEST LAPTIME/sec RACE LENGTH/min.
LAPS
0
-1
-2
-3
-4
-5
-7
OPEN
MEDIUM
TIGHT
TRACK TRACTION
HIGH
MEDIUM
LOW
TRACK SURFACE
TRACK TYPE
-9
-10 -11
-12
SOFT DIRT
CLAY
12°
BLUE GROOVE
ASTRO TURF
GRASS
14°
-7
-8
REAR DROOP
-6
-5
-4
-3
#107717 GAUGE
-2
0
-1
MEASURE UNDER WHEEL AXLE
UPPER PLATE-RADIO
PLATE STIFFENER
R3 R4
10°
R1R2
F1 F2
WING
MOUNTING
NO
YES
LEFT = RIGHT
MUD
WET
DUSTY
-9
F3 F4
HARD PACKED
DRY
#107703 SUPPORT BLOCKS
ALU
HUB
POSITION
-11 -10
-13 -12
CASTER
BUMPY
TRACK CONDITION
PLASTIC
1 2
CASTER
MEDIUM
SMOOTH
REAR LOWER
SHOCK POSITION
-13
#107717 GAUGE
MEASURE UNDER WHEEL AXLE
TRACK SIZE
-8
UPRIGHT
1 2
FRONT LOWER
SHOCK POSITION
-6
+1
+2
CAMBER LINK
LOCATION
2 1
FRONT DROOP
STANDARD
1
2
1 2 3
+1
/mm
OFFSET
ALU ADJUSTABLE
REAR HUB
REAR ROLL
CENTER
4
3
2
1
3
2
1
SHIM
1 2 3
4
2 3
DIFFERENTIALS
TYPE
FF
REAR
CENTER
FRONT
FR
DIFFERRENTIAL - OIL
WHEELBASE SHIM POSITION
GEARING
CLUTCH BELL
T
PINION
T
0mm
FRONT
SPUR GEAR
#358182 C = 0.65
#358183 C = 0.70
#358184 C = 0.75
#358185 C = 0.80
#358186 C = 0.86
#358187 C = 0.92
#358188 C = 0.98
T
#358282 C = 0.47
#358283 C = 0.50
#358284 C = 0.53
#358285 C = 0.57
#358286 C = 0.61
#358287 C = 0.65
#358288 C = 0.70
8 HOLES
1.2mm
1.4mm
FR
0.5
ANTI ROLL BAR
OUT
TIRES
TYPE
1
RF
REAR TOE
UPRIGHT
POSITION
IN
WHEELBASE
2
SOFT
0 mm
1 mm 2 mm
3mm
4 mm
BUMP STEER
6 HOLES
8 HOLES
SHIM UNDER
STEERING PLATE
10 HOLES
1
ANTI-ROLL BAR
POSITION
SHIMS IN FRONT OF UPRIGHT
ACKERMANN
POSITION
mm
3 2 1
FRONT
REAR
REAR
CAMBER
REAR
+
THICKNESS / mm
FRONT
RR
0.5
FRONT TOE
OTHERS
FRONT
1
ECCENTRIC BUSHINGS
MEDIUM
1.3mm
10 HOLES
REAR
1
TIGHT
REBOUND /%
1.1mm
2+2mm
0.5
ROLL
CENTER
SERVO SAVER
OIL / cST
PISTONS
2mm
0mm
SHIMS IN FRONT OF REAR ARM
0.5
FF
REAR
OTHER
6 HOLES
WHEELBASE SHIM POSITION
1
CROWN GEAR
WHITE
GREY
SILVER
GREY-BLUE
BLUE
VIOLET
PURPLE
2+2mm
RR
T
SHOCKS
FRONT
2mm
SHIMS BEHIND FRONT ARM
SHOE
SPRING
RF
SHOCK PRELOAD
SHOCK PRELOAD
mm
REAR
CAMBER
mm
-
-
+
REAR
FRONT ARM
REAR ARM
STANDARD
STANDARD
INSERTS
WHEELS
ENGINE
TYPE
F. RIDE HEIGHT
FRONT
RIDE HEIGHT
/mm
#107717 GAUGE
/mm R. RIDE HEIGHT
REAR
MANIFOLD
MUFFLER
PLUG
CHASSIS FLEX
SETTINGS
FUEL
BODY
TYPE
WING
STANDARD
SCREW USED
SCREW NOT USED
COMMENTS
FRONT WEIGHT
/g
FRONT
REAR
VER. 1.0 ©XRAY
RC AMERICA, 2970 BLYSTONE LANE, SUITE 109, DALLAS, 75220 TEXAS, USA
PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com
www.teamxray.com
www.facebook.com/teamxray
8
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Tube
910466
www.youtube.com/xrayracing
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