Xray RX8 User manual

XRAY RX8'23 & XRAY RX8E'23

2
BEFORE YOU START
This is a high-competition, high-quality RC car intended for persons aged 16
years and older with previous experience building and operating RC model
racing cars. This is not a toy; it is a precision racing model. This model racing
car is not intended for use by beginners, inexperienced customers, or by
children without direct supervision of a responsible, knowledgeable adult.
If you do not fulfill these requirements, please return the kit in unused and
unassembled form back to the shop where you have purchased it.
Before building and operating your XRAY, YOU MUST read through all of the
operating instructions and instruction manual and fully understand them
to get the maximum enjoyment and prevent unnecessary damage. Read
carefully and fully understand the instructions before beginning assembly.
Make sure you review this entire manual, download and use set-up book from
the web, and examine all details carefully. If for some reason you decide this
is not what you wanted or expected, do not continue any further. Your hobby
dealer can not accept your kit for return or exchange after it has been partially
or fully assembled.
Contents of the box may differ from pictures. In line with our policy of
continuous product development, the exact specifications of the kit may vary
without prior notice.
SAFETY PRECAUTIONS
WARNING: This product contains a chemical known to the state of California to
cause cancer and birth defects or other reproductive harm.
CAUTION: CANCER HAZARD
Wash thoroughly after using. DO NOT use product while eating, drinking or using
tobacco products. May cause chronic effects to gastrointestinal tract, CNS, kidneys,
and blood. MAY CAUSE BIRTH DEFECTS.
When building, using and/or operating this model always wear protective glasses
and gloves.
Take appropriate safety precautions prior to operating this model. You are
responsible for this model‘s assembly and safe operation! Please read the
instruction manual before building and operating this model and follow all safety
precautions. Always keep the instruction manual at hand for quick reference, even
after completing the assembly. Use only genuine and original authentic XRAY parts
for maximum performance. Using any third party parts on this model will void
guaranty immediately.
Improper operation may cause personal and/or property damage. XRAY and
its distributors have no control over damage resulting from shipping, improper
construction, or improper usage. XRAY assumes and accepts no responsibility for
personal and/or property damages resulting from the use of improper building
materials, equipment and operations. By purchasing any item produced by XRAY,
the buyer expressly warrants that he/she is in compliance with all applicable
federal, state and local laws and regulation regarding the purchase, ownership
and use of the item. The buyer expressly agrees to indemnify and hold harmless
XRAY for all claims resulting directly or indirectly from the purchase, ownership or
use of the product. By the act of assembling or operating this product, the user
accepts all resulting liability. If the buyer is not prepared to accept this liability, then
he/she should return this kit in new, unassembled, and unused condition to the
place of purchase.
IMPORTANT NOTES – GENERAL
• This product is not suitable for children under 16 years of age without the direct
supervision of a responsible and knowledgeable adult.
• Carefully read all manufacturers warnings and cautions for any parts used in the
construction and use of your model.
• Assemble this kit only in places away from the reach of very small children.
• First-time builders and users should seek advice from people who have building
experience in order to assemble the model correctly and to allow the model to
reach its performance potential.
• Exercise care when using tools and sharp instruments.
• Take care when building, as some parts may have sharp edges.
• Keep small parts out of reach of small children. Children must not be allowed to
put any parts in their mouth, or pull vinyl bag over their head.
• Read and follow instructions supplied with paints and/or cement, if used (not
included in kit).
• Immediately after using your model, do NOT touch equipment on the model such
as the motor and speed controller, because they generate high temperatures.
You may seriously burn yourself seriously touching them.
• Follow the operating instructions for the radio equipment at all times.
• Do not put fingers or any objects inside rotating and moving parts, as this may
cause damage or serious injury as your finger, hair, clothes, etc. may get caught.
• Be sure that your operating frequency is clear before turning on or running your
model, and never share the same frequency with somebody else at the same
time. Ensure that others are aware of the operating frequency you are using and
when you are using it.
• Use a transmitter designed for ground use with RC cars. Make sure that no one
else is using the same frequency as yours in your operating area. Using the same
frequency at the same time, whether it is driving, flying or sailing, can cause loss
of control of the RC model, resulting in a serious accident.
• Always turn on your transmitter before you turn on the receiver in the car. Always
turn off the receiver before turning your transmitter off.
• Keep the wheels of the model off the ground when checking the operation of the
radio equipment.
• Disconnect the battery pack before storing your model.
• When learning to operate your model, go to an area that has no obstacles that
can damage your model if your model suffers a collision.
• Remove any sand, mud, dirt, grass or water before putting your model away.
• If the model behaves strangely, immediately stop the model, check and clear the
problem.
• To prevent any serious personal injury and/or damage to property, be responsible
when operating all remote controlled models.
• The model car is not intended for use on public places and roads or areas where its
operation can conflict with or disrupt pedestrian or vehicular traffic.
• Because the model car is controlled by radio, it is subject to radio interference
from many sources that are beyond your control. Since radio interference can
cause momentary loss of control, always allow a safety margin in all directions
around the model in order to prevent collisions.
• Do not use your model:
- Near real cars, animals, or people that are unaware that an RC car is being
driven.
- In places where children and people gather
- In residential districts and parks
- In limited indoor spaces
- In wet conditions
- In the street
- In areas where loud noises can disturb others, such as hospitals and
residential areas.
- At night or anytime your line of sight to the model may be obstructed or
impaired in any way.
To prevent any serious personal injury and/or damage to property, please be
responsible when operating all remote controlled models.
FAILURE TO FOLLOW THESE INSTRUCTIONS WILL BE CONSIDERED AS ABUSE AND/OR NEGLECT.
CUSTOMER SUPPORT
XRAY Europe
K Výstavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: [phone]
Fax: [phone]
Email: [e-mail]
We have made every effort to make these instructions as easy to understand as
possible. However, if you have any difficulties, problems, or questions, please
do not hesitate to contact the XRAY support team at [e-mail]. Also,
please visit our Web site at www.teamxray.com to find the latest updates, set-up
information, option parts, and many other goodies. We pride ourselves on taking
excellent care of our customers.
You can join thousands of XRAY fans and enthusiasts in our online community at:
www.teamxray.com
XRAY USA
RC America, 2030 Century Center Blvd #15
Irving, TX 75062
USA
Phone: [phone]
Fax: [phone]
Email: [email protected]
IMPORTANT NOTES – NITRO ENGINES
• Always test the brakes and the throttle before starting your engine to avoid
losing control of the model.
• Make sure the air filter is clean and oiled.
• Never run your engine without an air filter. Your engine can be seriously
damaged if dirt and debris get inside the engine.
• For proper engine break-in, please refer to the manual that came with the
engine.
• Do not run near open flames or smoke while running your model or while
handling fuel.
• Some parts will be hot after operation. Do not touch the exhaust or the engine
until they have cooled. These parts may reach 275°F during operation!

3
IMPORTANT NOTES – ELECTRICAL
• Insulate any exposed electrical wiring (using heat shrink tubing or electrical tape)
to prevent dangerous short circuits. Take maximum care in wiring, connecting
and insulating cables. Make sure cables are always connected securely. Check
connectors for if they become loose. And if so, reconnect them securely. Never
use R/C models with damaged wires. A damaged wire is extremely dangerous,
and can cause short-circuits resulting in fire. Please have wires repaired at your
local hobby shop.
• Low battery power will result in loss of control. Loss of control can occur due to a
weak battery in either the transmitter or the receiver. Weak running battery may
also result in an out of control car if your car‘s receiver power is supplied by the
running battery. Stop operation immediately if the car starts to slow down.
• When not using RC model, always disconnect and remove battery.
• Do not disassemble battery or cut battery cables. If the running battery short-
circuits, approximately 300W of electricity can be discharged, leading to fire or
burns. Never disassemble battery or cut battery cables.
• Use a recommended charger for the receiver and transmitter batteries and
follow the instructions correctly. Over-charging, incorrect charging, or using
inferior chargers can cause the batteries to become dangerously hot. Recharge
battery when necessary. Continual recharging may damage battery and, in the
worst case, could build up heat leading to fire. If battery becomes extremely hot
during recharging, please ask your local hobby shop for check and/or repair
and/or replacement.
• Regularly check the charger for potential hazards such as damage to the cable,
plug, casing or other defects. Ensure that any damage is rectified before using
the charger again. Modifying the charger may cause short-circuit or overcharging
leading to a serious accident. Therefore do not modify the charger.
• Always unplug charger when recharging is finished.
• Do not recharge battery while battery is still warm. After use, battery retains
heat. Wait until it cools down before charging.
• Do not allow any metal part to short circuit the receiver batteries or other
electrical/electronic device on the model.
• Immediately stop running if your RC model gets wet as may cause short circuit.
• Please dispose of batteries responsibly. Never put batteries into fire.
WARRANTY
XRAY guarantees this model kit to be free from defects in both material and
workmanship within 30 days of purchase. The total monetary value under warranty
will in no case exceed the cost of the original kit purchased. This warranty does
not cover any components damaged by use or modification or as a result of wear.
Part or parts missing from this kit must be reported within 30 days of purchase. No
part or parts will be sent under warranty without proof of purchase. Should you
find a defective or missing part, contact the local distributor. Service and customer
support will be provided through local hobby store where you have purchased the
kit, therefore make sure to purchase any XRAY products at your local hobby store.
This model racing car is considered to be a high-performance racing vehicle. As
such this vehicle will be used in an extreme range of conditions and situations,
all which may cause premature wear or failure of any component. XRAY has no
control over usage of vehicles once they leave the dealer, therefore XRAY can only
offer warranty against all manufacturer‘s defects in materials, workmanship, and
assembly at point of sale and before use. No warranties are expressed or implied
that cover damage caused by what is considered normal use, or cover or imply
how long any model cars‘ components or electronic components will last before
requiring replacement.
Due to the high performance level of this model car you will need to periodically
maintain and replace consumable components. Any and all warranty coverage will
not cover replacement of any part or component damaged by neglect, abuse, or
improper or unreasonable use. This includes but is not limited to damage from
crashing, chemical and/or water damage, excessive moisture, improper or no
maintenance, or user modifications which compromise the integrity of components.
Warranty will not cover components that are considered consumable on RC
vehicles. XRAY does not pay nor refund shipping on any component sent to XRAY or
its distributors for warranty. XRAY reserves the right to make the final determination
of the warranty status of any component or part.
Limitations of Liability
XRAY makes no other warranties expressed or implied. XRAY shall not be liable
for any loss, injury or damages, whether direct, indirect, special, incidental, or
consequential, arising from the use, misuse, or abuse of this product and/or any
product or accessory required to operate this product. In no case shall XRAY‘s
liability excess the monetary value of this product.
Take adequate safety precautions prior to operating this model. You are
responsible for this model’s assembly and safe operation.
Disregard of the any of the above cautions may lead to accidents, personal
injury, or property damage. XRAY MODEL RACING CARS assumes no
responsibility for any injury, damage, or misuse of this product during
assembly or operation, nor any addictions that may arise from the use of
this product. All rights reserved.
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
difficulty finding XRAY products, please check out www.teamxray.com to get advice,
or contact us via email at [e-mail], or contact the XRAY distributor in
your country.
IMPORTANT NOTES – NITRO FUEL
• Handle fuel only outdoors. Never handle nitro fuel indoors, or mix nitro fuel in
a place where ventilation is bad.
• Only use nitro fuel for R/C models. Do not use gasoline or kerosene in R/C
models as it may cause a fire or explosion, and ruin your engine.
• Nitro fuel is highly inflammable, explosive, and poisonous. Never use fuel
indoors or in places with open fires and sources of heat.
• Always keep the fuel container cap tightly shut.
• Always read the warning label on the fuel container for safety information.
• Nitro-powered model engines emit poisonous vapors and gasses. These vapors
irritate eyes and can be highly dangerous to your health. We recommend wearing
rubber or vinyl gloves to avoid direct contact with nitro fuel.
• Nitro fuel for RC model cars is made of the combination of the methyl alcohol,
castor or synthetic oil, nitro methane etc. The flammability and volatility of these
elements is very high, so be very careful during handling and storage of nitro
fuel.
• Keep nitro fuel away from open flame, sources of heat, direct sunlight, high
temperatures, or near batteries.
• Store fuel in a cool, dry, dark, well-ventilated place, away from heating devices,
open flames, direct sunlight, or batteries. Keep nitro fuel away from children.
• Do not leave the fuel in the carburetor or fuel tank when the model is not in use.
There is danger that the fuel may leak out.
• Wipe up any spilled fuel with a cloth.
• Be aware of spilled or leaking fuel. Fuel leaks can cause fires or explosions.
• Do not dispose of fuel or empty fuel containers in a fire. There is danger of
explosion.

4
TOOLS REQUIRED
Allen 1.5mm (#111545 - HUDY EXCLUSIVE Limited Edition)
Allen 2.0mm (#112045 - HUDY EXCLUSIVE Limited Edition)
Allen 3.0mm (#113045 - HUDY EXCLUSIVE Limited Edition)
Socket 5.5mm (#175535 - HUDY EXCLUSIVE Limited Edition)
Caster Clip Remover (#107612 - HUDY EXCLUSIVE Limited Edition)
Arm Reamer 4.0mm (#107644 - HUDY EXCLUSIVE Limited Edition)
Arm Reamer 3.0mm (#107643 - HUDY EXCLUSIVE Limited Edition)
Reamer (#107602 - HUDY EXCLUSIVE Limited Edition)
Cross Wrench 3mm (HUDY #107581)
Special Tool for turnbuckles, nuts (HUDY #181090)
Pocket Hobby Knife (HUDY #188981)
Scissors (HUDY #188990)
Side Cutters
(HUDY #189010)
Combination Pliers
(HUDY #189020)
Professional Multi Tool
(HUDY #183011)
HUDY Ball Joint Wrench
Alu RX8 Pinion Gear Tool
Clutch Spring Tool
(HUDY #181110)
(XRAY #349903)
(HUDY #182005)
Turnbuckle Wrench 5mm
(HUDY #181050)
Ball Allen Wrench 2.5mm (#132545 - HUDY EXCLUSIVE Limited Edition)
Ball Allen Wrench 2.0mm (#132045 - HUDY EXCLUSIVE Limited Edition)
Allen Wrench 2.5mm (#112545 - HUDY EXCLUSIVE Limited Edition)
Flywheel/Clutch Multi-Tool (HUDY #182010)
Turnbuckle Wrench 3mm
(HUDY #181030)
Tweezers
SYMBOLS USED
Part bags used
Optional parts
Assembly view Assemble left and right sides the same way
Assemble in the specified order
Detail
Pay attention here
Assemble as many times as specified
Apply threadlock
Number of teeth
Apply oil
Follow tip here
Cut off remaining material
Ensure smooth non-binding movement
Apply grease
DETAIL
Slotted Screwdriver 4.0mm (#154055 - HUDY EXCLUSIVE Limited Edition)
Slotted Screwdriver 3.0mm (#153055 - HUDY EXCLUSIVE Limited Edition)

5
EQUIPMENT REQUIRED
Receiver Pack
Glow Plug IgniterStarter Box & Battery Pack
(HUDY #104500)
Steering and Throttle Servos
Battery Charger
Lexan™ Paint Fuel + Fuel Bottle
(HUDY #104200)
Wheels & Tires
Double-sided Tape
(HUDY #107875)
Transmitter & Receiver
Bearing Oil
(HUDY #106230)
TL
CA
CA glue
Threadlock
At the beginning of each section is an exploded view of the parts to be assembled. There is also a list of all the parts and part
numbers that are related to the assembly of that section. The part descriptions are color-coded to make it easier for you to
identify the source of a part. Here are what the different colors mean:
STYLE A - indicates parts that are included in the bag marked for the section.
STYLE B - indicates parts that are included in the box.
STYLE C - indicates parts that are already assembled from previous steps.
EQUIPMENT INCLUDED
(HUDY #106210)
Premium Graphite Grease
OIL
* Kit includes smaller but sufficient amount of oil and grease to build the car.
600cSt (#106360)
HUDY Premium Silicone Oils
Tire Truer
(HUDY #102003)
Exhaust & Manifold - Set
(FX #669550)
Engine
(FX R900 #660200)
Bodyshell
Engine After Run Oil
(HUDY #106250)
One-Way Lube
(HUDY #106231)
Air Filter Oil
(HUDY #106240)

6
REAR SOLID AXLE
CUTAWAY VIEW
FRONT ONE-WAY AXLE
BAG
ONE-WAY LUBE
(HUDY #106231)
ONE-WAY LUBE
(HUDY #106231)
STEP DETAIL
NOTE
ORIENTATION
OIL
1. FRONT ONE-WAY & REAR SOLID AXLE
345070
345011
345024
968140
345070
968120
345001 FRONT ONE-WAY - HARDCOATED + LIGHTWEIGHT ADAPTERS
345011 FRONT ONE-WAY AXLE - BLACK COATED
345024 COMPOSITE FRONT ONE-WAY AXLE PULLEY 24T
345070 FRONT ONE-WAY AXLE OUTDRIVE ADAPTER - HUDY SPRING STEEL™ (2)
345115 REAR SOLID AXLE SHAFT - LIGHTWEIGHT - HUDY SPRING STEEL™
345150 COMPOSITE REAR SOLID AXLE PULLEY 48T
345800 COMPOSITE BELT PULLEY COVER SET
968120 C-CLIP 12 (10)
968140 C-CLIP 14 (10)
980324 PIN 3x24 (10)
980324
345115
345150
968120
345800
01
968120
C 12
980324
P 3x24
968140
C 14
DETAIL
OIL

7
BAG
2. REAR SUSPENSION
2x
345360-K
345310 306219
901316
343311-H
337257
372651
901410
342631
343152
343285
902308
962121
941218
342070
901306
343131
337253
345280
901303
902306
902308
343197
303129
343112
303129 COMPOSITE SET OF SHIMS 3x 3x6x1MM; 1x 3x6x2MM (2)
306219 COMPOSITE SET OF SERVO SHIMS (4)
337253 COMPOSITE ADJUSTING NUT M10x1 (4)
337257 STEEL PIVOT BALL 8.4 MM (2)
342070 COMPOSITE SET OF BUSHINGS (2)
342631 ADJ. TURNBUCKLE L/R 28 MM - HUDY SPRING STEEL™ (2)
343112 SUSPENSION ARM FOR EXTENSION - REAR LOWER - HARD
343131 COMPOSITE SUSPENSION ARM REAR UPPER - HARD
343152 UPPER BALL JOINT 5.8MM - SHORT & LONG (2+2)
343197 ALU EXTENSION FOR SUSPENSION ARM - REAR LOWER - 7075 T6 (2)
343285 PIVOT BALL 6.8MM (2)
343311-H COMPOSITE UPRIGHT REAR FOR AERO DISC - HARD
345280 WHEEL SPRING (2)
345310 REAR WHEEL AXLE - HUDY SPRING STEEL™
345360-K ALU REAR WHEEL LOCK - SWISS 7075 T6 - BLACK (2)
372651 PIVOT BALL UNIVERSAL 4.9 MM - HUDY SPRING STEEL™ (2)
941218 BALL-BEARING 12x18x4 RUBBER SEALED - OIL (2)
980322
962121
962120
941218
342070
901303 HEX SCREW SB M3x3 (10)
901306 HEX SCREW SB M3x6 (10)
901316 HEX SCREW SB M3x16 (10)
901410 HEX SCREW SB M4x10 (10)
902306 HEX SCREW SH M3x6 (10)
902308 HEX SCREW SH M3x8 (10)
962120 WASHER S 12x15x0.5 (10)
962121 WASHER S 12x15x1.0 (10)
980322 PIN 3x22 (10)
02.1
#345301
REAR CVD DRIVE SHAFT SET
HUDY SPRING STEEL™
#345312
ALU REAR CVD DRIVE
AXLE SWISS 7075 T6
HARDCOATED
#345290
ALU SHIM 12x15x1.0MM (4)
#345370
GRAPHITE REAR AERO DISC
1.6mm - SET
#980322-T
TITAN PIN 3x22 (2)
ADJUSTING NUT
#337253 COMPOSITE
INCLUDED
#337252 ALU OPTION
*The alu nut must be used together with
#337254 – Composite Ball Cup 8.4mm.
SUSPENSION UPPER ARMS
#343130 MEDIUM
OPTION
#343131 HARD INCLUDED
#343132 GRAPHITE OPTION
REAR UPRIGHTS
#343311 MEDIUM
OPTION
#343311-H HARD INCLUDED
#343311-G GRAPHITE OPTION
SUSPENSION LOWER ARMS
#343111 MEDIUM
OPTION
#343112 HARD INCLUDED
#343113 GRAPHITE OPTION

8
COMPOSITE SET OF BUSHINGS
CONCENTRIC
INITIAL SETTING
INITIAL SETTING
ECCENTRIC
2x
When using eccentric bushings, both
bushings must be in same position.
NOTE ORIENTATION
962120
S 12x15x0.5 962121 S 12x15x1.0
941218
BB 12x18x4
OIL
DETAIL
IN OUT
1+1 0.5
1+0.5 1
1 1+0.5
0.5 1+1
0 1+1+0.5
INITIAL SETTING
SHIM SHIM
2x
38mm
46mm
NOTE
ORIENTATION
Tighten composite hex nuts using
HUDY tool #107581.
DETAIL STEP
902308
SH M3x8
902306
SH M3x6
901410
SB M4x10
901306
SB M3x6
DETAIL
1mm1mm
During initial assembly, tighten each composite hex nut until the pivot ball
starts to bind, then loosen slightly. Verify that the pivot balls move freely.
PIVOT BALLS MUST MOVE FREELY
3x8mm
3x6mm
Tighten gently
SHORTER ball joint
LONGER ball joint (INITIAL SETTING)
3x6mm
3x6x1mm
3x8mm
4x10mm
2x
Install the pivot balls with Professional Multi Tool
(HUDY #183011).
12x15x0.5mm
12x15x1mm
303129
SHIM 3x6x1
DETAIL
BEARING OIL
(HUDY #106230)
OIL
BEARING OIL
(HUDY #106230)
#345290
ALU SHIM 12x15x1.0MM (4)
#345301
REAR CVD DRIVE SHAFT SET
HUDY SPRING STEEL™
2. REAR SUSPENSION
ADJUSTING NUT
#337253 COMPOSITE
INCLUDED
#337252 ALU OPTION
*The alu nut must be used together with
#337254 – Composite Ball Cup 8.4mm.
#345312
ALU REAR CVD DRIVE AXLE
SWISS 7075 T6 - HARDCOATED
SUSPENSION UPPER ARMS
#343130 MEDIUM
OPTION
#343131 HARD INCLUDED
#343132 GRAPHITE OPTION
SUSPENSION LOWER ARMS
#343111 MEDIUM
OPTION
#343112 HARD INCLUDED
#343113 GRAPHITE OPTION
NOTE ORIENTATION
Right thread
Left thread

9
901303
SB M3x3
INITIAL POSITION
2mm
6mm
INNER HOLE
2. REAR SUSPENSION
2x
2x
2x
TIGHTEN GENTLY
TIGHTEN FULLY
306219
SHIM 3x6x2
901316
SB M3x16
980322
P 3x22
5.8mm
6.1mm
DETAIL
CUTAWAY VIEW
DETAIL
CENTERED
REAR UPRIGHTS
#343311 MEDIUM
OPTION
#343311-H HARD INCLUDED
#343311-G GRAPHITE OPTION
#980322-T
TITAN PIN 3x22 (2)

10
BAG
2. REAR SUSPENSION
303123-K ALU SHIM 3x6x2.0MM - BLACK (10)
334052 COMPOSITE BRAKE UPPER PLATE
334180 ADJUSTABLE BRAKE PAD GUIDE PIN - HUDY SPRING STEEL™ (2)
342070 COMPOSITE SET OF BUSHINGS (2)
342316 COMPOSITE REAR UPPER SUSP. ECCENTRIC BUSHING (4)
342317 COMPOSITE REAR LOWER SUSP. ECCENTRIC BUSHING (4)
343019 ALU LOWER BULKHEAD FRONT - SWISS 7075 T6 - RIGHT
343029 ALU LOWER BULKHEAD FRONT - SWISS 7075 T6 - LEFT
343038 ALU UPPER CLAMP REAR - SWISS 7075 T6 - (L+R)
343044 GRAPHITE REAR UPPER ARM HOLDER 3.5MM - FRONT
343047 GRAPHITE REAR UPPER ARM HOLDER 3.5MM - REAR
343069 STEEL BUSHING (2)
343075 STEEL NUT (2)
343084 GRAPHITE SHOCK TOWER REAR
343714 ALU REAR LOWER SUSPENSION HOLDER - FRONT - RF - BLACK
343724 ALU REAR LOWER SUSPENSION HOLDER - REAR - RR - BLA CK
344014 ALU BRAKE STAND - SWISS 7075 T6 - SET
344024 ALU 2-SPEED HOLDER - SWISS 7075 T6
344042 BRAKE CAM POST - STEEL
344111 VENTILATED BRAKE DISC PRECISION-GROUND LIGHTWEIGHT
344120 STEEL BRAKE PAD - HARDENED (2)
344131 BRAKE PAD “SLS” (2)
344144 BRAKE DISK ADAPTER - 7075 T6 - HARD COATED
345320 REAR DRIVE SHAFT 61MM - HUDY SPRING STEEL™
345454 PUR® REINFORCED DRIVE BELT REAR 9.0 x 201 MM
345510 2-SPEED SHAFT 8MM - SUPER LIGHTWEIGHT - HUDY SPRING STEEL™
345820 COMPOSITE 2-SPEED BELT PULLEY 20T - CENTER
347321 REAR UPPER INNER PIVOT PIN WITH FLAT SPOT (2)
352070 COMPOSITE BEARING HUB FOR DIFF (4)
353381 ALU SHIM 4x7.5x2 (4)
357210 REAR LOWER INNER PIVOT PIN (2)
372176 SPRING 4.25 COILS 3.6x6x0.4MM; C=1.5 - GOLD (SOFT) (2)
901303 HEX SCREW SB M3x3 (10)
901405 HEX SCREW SB M4x5 (10)
902308 HEX SCREW SH M3x8 (10)
902310 HEX SCREW SH M3x10 (10)
902314 HEX SCREW SH M3x14 (10)
903308 HEX SCREW SFH M3x8 (10)
903310 HEX SCREW SFH M3x10 (10)
903408 HEX SCREW SFH M4x8 (10)
930815 BALL-BEARING 8x14x4 STEEL SEALED - OIL (2)
940508 BALL-BEARING 5x8x2.5 RUBBER SEALED - OIL (2)
941218 BALL-BEARING 12x18x4 RUBBER SEALED - OIL (2)
960030 NUT M3 (10)
962032 WASHER S 3x6x0.2 (10)
965090 E-CLIP 9 (10)
981208 PIN 2x8 (10)
341108 CHASSIS 5MM - CNC MACHINED - SWISS 7075 T6
02.2
344131
344120
334180
372176
930815
930815
940508
902308
902308
901303
902314
345510
345820
965090
901405
344111
342316
343047
903308
902310
981208
341108
303123-K
342316
903310
343044
903308
343069
347321
357210
903310
352070
962032
344120
344131
960030
903408
903408
342070
941218
903408 345454
334052
940508
344042 343075
345320
903308
903310
343084
344014
343038
343019
343038
343029
343724
344024
344144
343714 342317
342317
353381
#345301
REAR CVD DRIVE SHAFT SET -
HUDY SPRING STEEL™

11
COMPOSITE SET OF BUSHINGS
COMPOSITE
BUSHING
NOTE
ORIENTATION
DETAIL
903408
SFH M4x8
NOTE ORIENTATION
NOTE ORIENTATION
NOTE ORIENTATION
Both bushings must be in same position.
Both bushings must be in same position.
941218
BB 12x18x4
TO LOOSEN REAR BELT: Rotate both rear composite hubs in arrow direction A
REAR BELT TENSION
ADJUSTMENT
Use white mark on tab for better visibility
of composite hub position.
NOTE
ORIENTATION
L=R
TO TIGHTEN REAR BELT: Rotate both rear composite hubs in arrow direction B
INITIAL POSITION
INITIAL
SETTING
BA
DETAIL
902308
SH M3x8
DETAIL
2. REAR SUSPENSION
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)

12
INITIAL SETTING
903308
SFH M3x8
NOTE
ORIENTATION
The upper roll center positions cannot be
used. Use always low or medium roll center
positions ONLY.
NOTE
903310
SFH M3x10
903408
SFH M4x8
2. REAR SUSPENSION

13
TIGHTEN FULLY
set-screw M3x6 onto flatspot.
NOTE ORIENTATION
2x
INITIAL SETTING
DETAIL
2mm
2. REAR SUSPENSION
It is extremely important that
the arms move freely on the
pivot pins. If they do not, use
the #107644 HUDY Arm
Reamer to slightly resize the
holes in the arms.
#345301
REAR CVD DRIVE SHAFT SET -
HUDY SPRING STEEL™
902310
SH M3x10
353381
SHIM 4x7.5x2
It is extremely important that the
arms move freely on the pivot pins.
If they do not, use the #107643
HUDY Arm Reamer to slightly resize
the holes in the arms.
ARM REAMER
903308
SFH M3x8
ARM REAMER
When using wider rear TRACK WIDTH, we recommend to put fuel
tube between the into the solid axle from both sides before inserting
the drive shaft to make sure that the drive shaft will not fall out.
We recommend to use 260mm rear track width as INITIAL SETTING.
Fuel tube
Fuel tube
TRACK WIDTH
If you use the rear width wider than 261mm,
we recommend to use 13mm wide tube from
each side of the solid axle.
IT IS VERY IMPORTANT
that the drive shaft has axial play
otherwise without play, the whole
suspension will not move freely and
it will have very negative impact on
the car handling.
If you use the rear width wider than 264mm, we recommend to use
13mm wide tube from each side of the solid axle and 10mm wide
tube inside of the rear wheel axle.
13mm13mm 13mm13mm 10mm10mm solid axlesolid axle
wheel axlewheel axle
2mm
303123-K
SHIM 3x6x2
Use always low or medium
roll center positions ONLY.
The upper roll center
positions cannot be used.
Eccentric bushings
INITIAL SETTING

14
940508
BB 5x8x2.5
930815
BB 8x14x4
960030
N M3
962032
SHIM 3x6x0.2
10.5mm
DETAIL
Roughen steel plates with sandpaper
before gluing fibre pads.
We recommend gluing the brake pads to the steel pads,
however there is no performance difference between
glued & unglued brake pads.
NOTE ORIENTATION
HOLE - OVAL
HOLE - ROUND
FIBRE PADS FACE
TOGETHER
0.2mm
0.2mm
0.2mm
0.2mm
HOLE - OVAL
965070
C 7
➊
➋
903310
SFH M3x10
NOTE ORIENTATION
NOTE ORIENTATION
NOTE ORIENTATION
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)
8x14x4mm
8x14x4mm
5x8x2.5
BELT PULLEY 20T - 2-SPEED CENTER
BELT PULLEY 18T - ø8 REAR
BELT PULLEY 18T - ø6 CENTER
BELT PULLEY 28T - FRONT
BELT PULLEY 29T - FRONT
#345801-G
LOW FRICTION COMPOSITE BELT PULLEY SET - GRAPHITE
2. REAR SUSPENSION
BEARING WITH BLUE COVERS

15
903308
SFH M3x8
2. REAR SUSPENSION
901405
SB M4x5
902314
SH M3x14
➊
➍
NOTE ORIENTATION
➌
Tighten set-screw onto flat spot.
➍
STEP DETAIL
DETAIL
Pin must protrude equally
on both sides of camshaft.
940508
BB 5x8x2.5
981208
P 2x8
902308
SH M3x8
901303
SB M3x3
➋
BEARING OIL
(HUDY #106230)
BEARING WITH BLUE COVERS

16
2x 2x 2x
6mm THREAD
26mm
DETAIL
Install the pivot balls with Professional
Multi Tool (HUDY #183011).
#341381 GRAPHITE REAR BODY
CENTERING PLATE - SET
2. REAR SUSPENSION
BAG
902318
901303
940508
362650
901303
302080
901305
341370-M
341360-M
902310
302292
341380-M
341331-M
347330
902310 302292
302663
333442
303138-K
303454
332071
343476
940508
02.3
901305
341360-M
901303
332071
343482-K
343482-K
302080 CASTER CLIPS SET 4+3+2+1 MM (2)
302292 STEEL STEERING BUSHING LONG (4)
302663 COMPOSITE BALL JOINT 4.9MM - OPEN - V2 (8)
303138-K ALU SHIM 3x7x2.0MM - BLACK (10)
303454 BALL JOINT 4.9MM - OPEN (4)
332071 COMPOSITE BALL-BEARING HUB (4)
333442 ALU ANTI-ROLL BAR COLLAR o2.6 (2)
341360-M COMPOSITE REAR BODY HOLDER SCREW - MEDIUM (2)
341370-M COMPOSITE REAR BODY HOLDER ARM - MEDIUM
341380-M COMPOSITE REAR BODY CENTERING PLATE - MEDIUM
343476 ANTI-ROLL BAR REAR 2.6MM
343482-K ALU CUT ANTI-ROLL BAR COLLAR 2.6MM - BLACK (2)
347330 REAR BODY HOLDER ARM PIN (2)
362650 BALL END 4.9MM WITH THREAD 6MM (2)
901303 HEX SCREW SB M3x3 (10)
901305 HEX SCREW SB M3x5 (10)
902310 HEX SCREW SH M3x10 (10)
902318 HEX SCREW SH M3x18 (10)
940508 BALL-BEARING 5x8x2.5 RUBBER SEALED - OIL (2)
341331-M COMPOSITE REAR BODY HOLDER - HIGHER - MEDIUM
REAR ANTI-ROLL BARS COLLARS
#343476 2.6mm INCLUDED
#343478 2.8mm OPTION
#343479 3.0mm OPTION
#333442 + 343482-K
#333441 + 343485-K
#333441 + 343481-K
INCLUDED
DETAIL
2.0mm

17
901303
SB M3x3
When the bars are set, verify that both sides move at the same
time. If they do, the bars are set up correctly. If not, make sure
that both downstops are the same and that the bar wire is flat.
Set the bar into the center, remove the play in the
bushings, and tighten the setscrews fully.
CENTER
DETAIL
DETAIL
REAR ANTI-ROLL BARS COLLARS
#343476 2.6mm INCLUDED
#343478 2.8mm OPTION
#343479 3.0mm OPTION
#333442 + 343482-K
#333441 + 343485-K
#333441 + 343481-K
INCLUDED
2. REAR SUSPENSION
940508
BB 5x8x2.5
BEARING WITH RUBBER COVERS
BEARING OIL

18
902310
SH M3x10
DETAIL
901305
SB M3x5
902318
SH M3x18
2. REAR SUSPENSION
INITIAL SETTING
2mm
2mm
2mm
2mm
DETAIL
INITIAL SETTING
SHIMS (STEP )
DETAIL
INITIAL SETTING
Distance according to bodyshell.
#341381 GRAPHITE REAR BODY
CENTERING PLATE - SET
It is extremely important that the arms move freely
on the pivot pins. If they do not, use the #107643
HUDY Arm Reamer to slightly resize the holes in
the arms. ARM REAMER
MOVE FREELY Tighten gently
Tighten
gently
MOVE FREELY
303123-K
SHIM 3x6x2

19
3. REAR TRANSMISSION
BAG
980314
P 3x14
965070
C 7
BELT PULLEY 20T - 2-SPEED CENTER
BELT PULLEY 18T - ø8 REAR
BELT PULLEY 18T - ø6 CENTER
BELT PULLEY 28T - FRONT
BELT PULLEY 29T - FRONT
#345801-G
LOW FRICTION COMPOSITE BELT PULLEY SET - GRAPHITE
335540 COMPOSITE 2-SPEED GEAR BOX SHOE SET
335655 GRAPHITE 2-SPEED GEAR 55T (2nd)
335659 GRAPHITE 2-SPEED GEAR 59T (1st)
335582 SPRING FOR GEAR BOX - HARD (2)
345524 CARRIER FOR 2-SPEED GEAR (2nd) - SMALL
345532 ALU DRIVE FLANGE WITH ONE-WAY BEARING - SMALL - LIGHTWEIGHT
345571 ADAPTER 2-SPEED SMALL
345592-K ALU 2-SPEED SHAFT SHIM - BLACK (2)
345593 STEEL 2-SPEED SHAFT SHIM (2)
345596-K ALU COLLAR 8x9.8x9MM - BLACK
345800 COMPOSITE BELT PULLEY COVER SET
345838 COMPOSITE SIDE BELT PULLEY 18T ø8 - REAR
901305 HEX SCREW SB M3x5 (10)
903306 HEX SCREW SFH M3x6 (10)
908262 HEX SCREW SOCKET HEAD CAP M2.5x12 (10)
950812 BALL-BEARING 8x12x3.5 FLANGED - STEEL SEALED - OIL (2)
965070 E-CLIP 7 (10)
980314 PIN 3x14 (10)
981310 PIN 3x10 (10)
983404 ROLLER PIN 4x4 MM (2)
901305
965070
983404
980314
345592-K
981310
345800
908262
908262
345593
335659 345532
903306
335655
950812
345524
903306 345571
983404
335540
345838
965070
335582
950812
345596-K
➊
➋
➌
➍
➎
Use the belt pulley cover 18T
with hole diameter of 10mm.
➌
STEP DETAIL
NOTE ORIENTATION
18
1ST GRAPHITE 2-SPEED GEARS
335657 57T (1st) OPTION
335658 58T (1st) OPTION
335659 59T (1st) INCLUDED
335660 60T (1st) OPTION
2ND GRAPHITE 2-SPEED GEARS
335653 53T (2nd) OPTION
335654 54T (2nd) OPTION
335655 55T (2nd) INCLUDED
GEAR BOX SPRING
#335581 C=7.8 OPTION
#335582 C=10.4 INCLUDED
#335583 C=8.5 OPTION
9mm

20
3. REAR TRANSMISSION
965070
C 7
981310
P 3x10
345592-K
ALU SHIM 8x10x1.5
345593
STEEL SHIM 8x10x1.5
901305
SB M3x5
908262
SCH M2.5x12
983404
RP 4x4
➊
➊
➋
➋
➌
➍
➍
➎
➎
NOTE
ORIENTATION
NOTE
ORIENTATION
NOTE
ORIENTATION
Use white paint to color the top of ONE screw
head. This will allow you to identify the two
different screws - one white, one dark -
when you are adjusting the shift point.
SHIFT-POINT SCREW
SHOE-GAP SET-SCREW
Set-screws must NOT protrude.
Top of screw head
should be level with
hole bottom edge.
Do not overtighten gap-setting set-screws. Only
tighten until roller pins contact the center hub.
903306
SFH M3x6
950812
BB 8x12x4
NOTE
ORIENTATION
2ND GEAR 1ST GEAR
NOTE
ORIENTATION
Use HUDY Reamer #107601 or #107602 to
slightly chamfer the edges on all 3 screw holes
from inside.
Use HUDY Reamer #107601 or #107602 to
slightly chamfer the edges on all 3 screw holes
from inside.
55 59
DETAIL
ALU Shim
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)
2ND GEAR
1ST GEAR
NOTE
ORIENTATION
NOTE
ORIENTATION
➊
➋
➌
55
59 1ST GRAPHITE 2-SPEED GEARS
2ND GRAPHITE 2-SPEED GEARS
See page19, exploded view.
ONE-WAY LUBE
(HUDY #106231)
GEAR BOX SPRING
#335581 C=7.8 OPTION
#335582 C=10.4 INCLUDED
#335583 C=8.5 OPTION
STEEL Shim
DETAIL
Marked 1 strip
When the #345511 - 2-Speed Shaft 8mm Short
is used this STEEL shim CAN NOT be used.