Xray RX8.2 User manual

XRAY RX8.2 & XRAY RX8E.2

2
BEFORE YOU START
The RX8 is a high-competition, high-quality, 1/8-scale on-road nitro 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 RX8, 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 Instruction Manual and examine all details carefully. If for some reason you
decide the RX8 is not what you wanted or expected, do not continue any further. Your hobby dealer cannot accept
your RX8 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.
• 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.
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.
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 RC America
2030 Century Center Blvd #15, Suite 109
75062 Irving
Texas, 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!
Please note that raw materials such as aluminum, steel, brass, fibreglass, or carbon fibre may
have small scratches on the surface which is a standard characteristic of any raw material.
Scratches on the surface of any materials are NOT considered to be material defects.
Products may potentially have small amounts of corrosion on them. This may be caused by variances in
weather during different times of the year, humidity in the shop or during shipping, and other contributing
factors. Even though we have taken all precautions and protection methods to prevent corrosion, these small
amounts of corrosion (if present) are unavoidable and considered to be acceptable.
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
EQUIPMENT REQUIRED
TOOLS REQUIRED
SYMBOLS USED
Transmitter Steering & Throttle ServosReceiver
Battery Charger
Starter Box (HUDY #104400)
& Battery Pack
Exhaust Manifold
Engine
Air Filter Air Filter Oil
(HUDY #106240)
Model R/C Car Fuel
(nitromethane)
ThreadlockCA Glue
Glowplug Igniter
One-Way Lube
(HUDY #106231)
Engine After Run Oil
(HUDY #106250)
Bearing Oil
(HUDY #106230)
Apply cyanoacrylate (CA) glue
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 (here twice)
Apply threadlock Number of teeth
Apply oil (may indicate specific type)
Follow tip here
Cut off remaining material
Ensure smooth non-binding movement
Apply grease
Graphite Grease
(HUDY #106210)
Lexan® Paint Bodyshell Receiver Battery Pack
Personal Transponder
DETAIL
Wheels & Tires Tire Truer
(HUDY #102003)
Reamer
(HUDY #107602)
(HUDY #107601)
Wrench Glowplug/Clutchnut
(HUDY #107581)
Flywheel Tool
(HUDY #182010)
Pliers
(HUDY #189020)
Side Cutters
(HUDY #189010)
Pocket Hobby Knife
(HUDY #188981)
3.0 mm
Turnbuckle ToolsTurnbuckle Tools
(HUDY #181091 3.0/4.0mm) (HUDY #181030 - 3.0mm)
Scissors
(HUDY #188990)
Professional Multi Tool
(HUDY #183011)
Ball Joint Wrench
(HUDY #181110)
Alu Pinion Gear Tool
(XRAY #349903)
Phillips 3.5mm
Allen Ball 2.5mm
Slotted Screwdriver 4.0mm
Exhaust Spring / Caster Clip Remover
Allen 1.5 / 2.0 / 2.5 / 3.0mm
Arm Reamer 3mm/4mm

5
#345071
FRONT ONE-WAY AXLE OUTDRIVE ADAPTER - LIGHTWEIGHT (2)
REAR SOLID AXLE
CUTAWAY VIEW
FRONT ONE-WAY AXLE
#345071
FRONT ONE-WAY AXLE OUTDRIVE ADAPTER - LIGHTWEIGHT (2)
BAG
ONE-WAY LUBE
(HUDY #106231)
ONE-WAY LUBE
(HUDY #106231)
STEP DETAIL
NOTE
ORIENTATION
OIL
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)
345113 REAR SOLID AXLE SHAFT - 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
345113
345150
968120
345800
01
968120
C 12
980324
P 3x24
968140
C 14
DETAIL

6
#345312
ALU REAR CVD DRIVE AXLE
SWISS 7075 T6 - HARDCOATED
#345301
REAR CVD DRIVE SHAFT SET
HUDY SPRING STEEL™
#345290
ALU SHIM 12x15x1.0MM (4)
BAG
2. REAR SUSPENSION
2x
345360-O
345310 306219
901316
343311
337257
372651
901410
342631
343152
343285
902308
962121
941218
342070
901306
343130
337253 345280
901303
902306
902308
343196
303129
343111
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)
343111 SUSPENSION ARM FOR EXTENSION - REAR LOWER
343130 COMPOSITE SUSPENSION ARM REAR UPPER
343152 UPPER BALL JOINT 5.8MM - SHORT & LONG (2+2)
343196 STEEL EXTENSION FOR SUSPENSION ARM - REAR LOWER (2)
343285 PIVOT BALL 6.8MM (2)
343311 COMPOSITE UPRIGHT REAR FOR AERO DISC
345280 WHEEL SPRING (2)
345310 REAR WHEEL AXLE - HUDY SPRING STEEL™
345360-O ALU REAR WHEEL LOCK - SWISS 7075 T6 - ORANGE (2)
345370 GRAPHITE REAR AERODYNAMIC DISC 1.6MM - SET (OPTION)
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
#345370
GRAPHITE REAR AERO DISC
1.6mm - SET
ADJUSTING NUT
#337253 COMPOSITE
INCLUDED
#337252 ALU OPTION
SUSPENSION UPPER ARMS
#343130 MEDIUM
INCLUDED
#343131 HARD OPTION
#343132 GRAPHITE OPTION
SUSPENSION LOWER ARMS
#343111 MEDIUM
INCLUDED
#343112 HARD OPTION
#343113 GRAPHITE OPTION

7
COMPOSITE SET OF BUSHINGS
CONCENTRIC
CONCENTRIC
INITIAL SETTING
INITIAL SETTING ECCENTRIC
2x
2. REAR SUSPENSION
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
OIL
#345312
ALU REAR CVD DRIVE AXLE
SWISS 7075 T6 - HARDCOATED
#345301
REAR CVD DRIVE SHAFT SET
HUDY SPRING STEEL™
#345290
ALU SHIM 12x15x1.0MM (4)
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
42mm
49.6mm
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
2.5mm2.5mm
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
DETAIL
3x8mm
3x6mm
Tighten gently
SHORTER ball joint
LONGER ball joint (INITIAL SETTING)
3x6mm
3x6x1mm
3x8mm
4x10mm
ADJUSTING NUT
#337253 COMPOSITE
INCLUDED
#337252 ALU OPTION
2x
Install the pivot balls with Professional Multi Tool
(HUDY #183011)
12x15x0.5mm
12x15x1mm
303129
SHIM 3x6x1
DETAIL
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)
SUSPENSION UPPER ARMS
#343130 MEDIUM
INCLUDED
#343131 HARD OPTION
#343132 GRAPHITE OPTION
SUSPENSION LOWER ARMS
#343111 MEDIUM
INCLUDED
#343112 HARD OPTION
#343113 GRAPHITE OPTION
NOTE ORIENTATION
Right thread
Left thread

8
901303
SB M3x3
INITIAL POSITION
3x6x2mm
6mm
OUTER
7.6mm
7.9mm
2x
2x
2x
TIGHTEN GENTLY
TIGHTEN FULLY
306219
SHIM 3x6x2
901316
SB M3x16
980322
P 3x22
DETAIL
CUTAWAY VIEW
DETAIL
CENTERED
2. REAR SUSPENSION

9
#345920
ALU 2-SPEED BELT PULLEY
20T - CENTER - SET
BAG
2. REAR SUSPENSION
296530-O ALU NUT M3 - ORANGE (10)
303123-O ALU SHIM 3x6x2.0MM - ORANGE (10)
303135-O ALU SHIM 3x6x13.0MM - ORANGE (2)
334052 COMPOSITE BRAKE UPPER PLATE
341106 CHASSIS 5MM - CNC MACHINED - SWISS 7075 T6
342070 COMPOSITE SET OF BUSHINGS (2)
342316 COMPOSITE REAR UPPER SUSP. ECCENTRIC BUSHING (4)
342317 COMPOSITE REAR LOWER SUSP. ECCENTRIC BUSHING (4)
343016 ALU LOWER BULKHEAD REAR - SWISS 7075 T6 - RIGHT
343026 ALU LOWER BULKHEAD REAR - SWISS 7075 T6 - LEFT
343044 GRAPHITE REAR UPPER ARM HOLDER 3.5MM - FRONT
343045 ALU UPPER CLAMP REAR - SWISS 7075 T6 - (L+R)
343047 GRAPHITE REAR UPPER ARM HOLDER 3.5MM - REAR
343052 GRAPHITE REAR BULKHEAD BRACE 2.5MM
343069 STEEL BUSHING (2)
343071 BELT TENSIONER SET - STEEL
343084 GRAPHITE SHOCK TOWER REAR
343712 ALU REAR LOWER SUSPENSION HOLDER - FRONT - RF
343722 ALU REAR LOWER SUSPENSION HOLDER - REAR - RR
344012 ALU BRAKE STAND - SWISS 7075 T6 - SET
344022 ALU 2-SPEED HOLDER - SWISS 7075 T6
344042 BRAKE CAM POST - STEEL
344110 VENTILATED BRAKE DISC - PRECISION-GROUND
344120 STEEL BRAKE PAD - HARDENED (2)
344131 BRAKE PAD “SLS” (2)
344142 BRAKE DISK ADAPTER - SWISS 7075 T6 - BLACK HARDCOATED
345320 REAR DRIVE SHAFT 61MM - HUDY SPRING STEEL™
345450 PUR® REINFORCED DRIVE BELT REAR 8.0 x 204 MM
345510 2-SPEED SHAFT 8MM - SUPER LIGHTWEIGHT - HUDY SPRING STEEL™
345820 COMPOSITE 2-SPEED BELT PULLEY 20T - CENTER
347310 REAR LOWER INNER PIVOT PIN (2)
347322 REAR UPPER INNER PIVOT PIN WITH FLAT SPOT (2)
352070 COMPOSITE BEARING HUB FOR DIFF (4)
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)
902306 HEX SCREW SH M3x6 (10)
902308 HEX SCREW SH M3x8 (10)
902310 HEX SCREW SH M3x10 (10)
902314 HEX SCREW SH M3x14 (10)
902322 HEX SCREW SH M3x22 (10)
902325 HEX SCREW SH M3x25 (10)
903306 HEX SCREW SFH M3x6 (10)
903308 HEX SCREW SFH M3x8 (10)
903310 HEX SCREW SFH M3x10 (10)
903408 HEX SCREW SFH M4x8 (10)
940508 BALL-BEARING 5x8x2.5 RUBBER SEALED - OIL (2)
940815 BALL-BEARING 8x14x4 RUBBER SEALED - OIL (2)
941218 BALL-BEARING 12x18x4 RUBBER SEALED - OIL (2)
965090 E-CLIP 9 (10)
981208 PIN 2x8 (10)
02.2
902325
940815
296530-O
344131
303123-O
303135-O
303135-O
902325
902306
343052
352070
940508
902308
902308
901303
902314
345510
345820
965090
901405
344110
343047
903308
902310
981208
341106
342316
342316
903310
343069
347322
347310
903310
940815
902322
372176
344120
344120
903308
903408
342070
941218
903408 345450
334052
940508
344042 343071
903308
343044
345320
903308
903310
343084
344012
343045
343016
343045
343026
343722
344022
344142
903306
343712
#345452
LOW-FRICTION KEVLAR®
DRIVE BELT REAR
8.0x204mm
342317
342317
#344111
VENTILATED BRAKE DISC
PRECISION-GROUND
LIGHTWEIGHT #345301
REAR CVD DRIVE SHAFT SET -
HUDY SPRING STEEL™

10
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
BA
DETAIL
902308
SH M3x8
#345452
LOW-FRICTION KEVLAR®
DRIVE BELT REAR
8.0 x 204 MM
DETAIL
2. REAR SUSPENSION
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)

11
903308
SFH M3x8
903306
SFH M3x6
INITIAL SETTING
2. REAR SUSPENSION
903308
SFH M3x8
NOTE
ORIENTATION
3x8mm
3x8mm
3x6mm
The upper roll center positions cannot be
used. Use always low or medium roll center
positions ONLY.
NOTE
903310
SFH M3x10

12
INITIAL SETTING
TIGHTEN FULLY
set-screw M3x6 onto flatspot
NOTE ORIENTATION
2x
DETAIL
DETAIL
INITIAL SETTING
It is extremely important that the
arms move freely on the pivot pins. If
they do not, use the #107634 HUDY
Arm Reamer to slightly resize the
holes in the arms.
It is extremely important that the
arms move freely on the pivot pins.
If they do not, use the #107633
HUDY Arm Reamer to slightly resize
the holes in the arms.
#345301
REAR CVD DRIVE SHAFT SET -
HUDY SPRING STEEL™
The upper roll center positions cannot be
used. Use always low or medium roll center
positions ONLY.
NOTE
902310
SH M3x10
ARM REAMER
ARM REAMER
2. REAR SUSPENSION
903308
SFH M3x8

13
940508
BB 5x8x2.5
940815
BB 8x14x4
296530-O
N M3
303123-O
SHIM 3x6x2
902322
SH M3x22
FIBRE PADS FACE
TOGETHER
3x6x2mm
3x6x2mm
10mm
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 - OVAL
HOLE - ROUND
2. REAR SUSPENSION
965070
C 7
➊
➋#345920
ALU 2-SPEED BELT PULLEY 20T
CENTER - SET
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-O
LOW FRICTION COMPOSITE BELT PULLEY SET - GRAPHITE
BEARING WITH BLUE COVERS

14
903308
SFH M3x8
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
902306
SH M3x6
901303
SB M3x3
#344111
VENTILATED BRAKE DISC
- PRECISION - GROUND -
LIGHTWEIGHT
2. REAR SUSPENSION
3x8mm 3x8mm
3x3mm
3x6mm
3x6mm
BEARING OIL
(HUDY #106230)
These screws are part of the
REAR SUSPENSION MULTI-FLEX™ TECHNOLOGY
(see page 15)
BEARING WITH BLUE COVERS

15
303135-O
SHIM 3x6x13
902325
SH M3x25
2. REAR SUSPENSION
Graphite brace and posts are not used. This allows
maximum flex of the rear suspension and generates
maximum rear traction. Recommended for low-traction
tracks.
Graphite brace connected to 2-speed bulkheads without
posts. This slightly reduces the flex of the rear suspension
and improves out-of-corner steering and rotation
of the car, but also slightly decreases rear traction.
Recommended for medium-traction tracks.
The all-new rear suspension design features Multi-Flex™ quick adjustment to easily adapt the handling of the
car to particular track conditions and tires used. There are 3 different flex characteristics to choose from.
Graphite brace connected to 2-speed bulkheads with
posts. This connects the entire rear suspension together,
creating a stiff frame which allows the car to rotate more
and improves out-of-corner steering. Recommended for
high-traction tracks.
(INITIAL SETTING)
ALTERNATIVE 1
SOFT
ALTERNATIVE 2
MEDIUM
ALTERNATIVE 3
STIFF
REAR SUSPENSION MULTI-FLEX™TECHNOLOGY
3x6x13mm
3x6x13mm

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
902314
901303
940508
332071
362650
901302 302080
901305
341370
341360
902310
302291
302291
341380
341331
347330
902310
302663
333441
343481-K
303454
343468
940508
02.3
901305
341360
901303
332071
343481-K
302080 CASTER CLIPS SET 4+3+2+1 MM (2)
302291 STEEL STEERING BUSHING (2+2)
302663 COMPOSITE BALL JOINT 4.9MM - OPEN - V2 (8)
303454 BALL JOINT 4.9MM - OPEN (4)
332071 COMPOSITE BALL-BEARING HUB (4)
333441 ALU ANTI-ROLL BAR COLLAR o3.0 (2)
341331 COMPOSITE REAR BODY HOLDER - HIGHER
341360 COMPOSITE REAR BODY HOLDER SCREW (2)
341370 COMPOSITE REAR BODY HOLDER ARM
341380 COMPOSITE REAR BODY CENTERING PLATE
343468 ANTI-ROLL BAR REAR 2.8 MM
343481-K ALU CUTTED ANTI-ROLL BAR COLLAR - BLACK (2)
347330 REAR BODY HOLDER ARM PIN (2)
362650 BALL END 4.9MM WITH THREAD 6MM (2)
901302 HEX SCREW SB M3x2.5 (10)
901303 HEX SCREW SB M3x3 (10)
901304 HEX SCREW SB M3x4 (10)
901305 HEX SCREW SB M3x5 (10)
902310 HEX SCREW SH M3x10 (10)
902314 HEX SCREW SH M3x14 (10)
940508 BALL-BEARING 5x8x2.5 RUBBER SEALED - OIL (2)
REAR ANTI-ROLL BARS COLLARS
#343466 2.6mm OPTION
#343468 2.8mm INCLUDED
#343470 3.0mm OPTION
#333442 + 343482-K
#333441 + 343481-K
OPTION
INCLUDED
DETAIL
2.0mm

17
901303
SB M3x3
901302
SB M3x2.5
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.
3x2.5mm
3x2.5mm
3x3mm
3x3mm
Set the bar into the center, remove the play in the
bushings, and tighten the setscrews fully.
CENTER
DETAIL
DETAIL
2. REAR SUSPENSION
940508
BB 5x8x2.5
BEARING WITH STEEL COVERS
REAR ANTI-ROLL BARS COLLARS
#343466 2.6mm OPTION
#343468 2.8mm INCLUDED
#343470 3.0mm OPTION
#333442 + 343482-K
#333441 + 343481-K
OPTION
INCLUDED
BEARING OIL

18
902310
SH M3x10
DETAIL
901305
SB M3x5
902314
SH M3x14
DETAIL
DETAIL
2. REAR SUSPENSION
INITIAL SETTING
INITIAL SETTING
INITIAL SETTING
2mm
2mm
Distance according to bodyshell
SHIMS (STEP )
#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 #107633
HUDY Arm Reamer to slightly resize the holes in
the arms. ARM REAMER
MOVE FREELY
MOVE FREELY

19
3. REAR TRANSMISSION
BAG
345592-K
ALU SHIM 8x10x1.5
980314
P 3x14
965070
C 7
ALU Shims 8x10x1.5mm
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-O
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)
345522 CARRIER FOR 2-SPEED GEAR (2nd) - SMALL
345531 ALU DRIVE FLANGE WITH ONE-WAY BEARING - SMALL - 7075 T6
345571 ADAPTER 2-SPEED SMALL
345592-K ALU 2-SPEED SHAFT SHIM - BLACK (2)
345593 STEEL 2-SPEED SHAFT SHIM (2)
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
950812
965070
983404
980314
345592-K
981310
345800
908262
#345591-O
ALU 2-SPEED SHAFT LOCATING COLLAR
- LIGHTWEIGHT - ORANGE
908262
345593
335659
345531
903306
335655
950812
345522
903306 345571
983404
335540
345838
965070
335582
345800
➊
➋
NOTE
ORIENTATION
➌➍➏
➎
Use the belt pulley cover 18T
with hole diameter of 10mm
7.5mm
8mm
➌
STEP DETAIL
STEP DETAIL
➊
NOTE ORIENTATION
18
#345591-O
ALU 2-SPEED SHAFT LOCATING COLLAR
- LIGHTWEIGHT - ORANGE
GEAR BOX SPRING
#335581 C=7.8 OPTION
#335582 C=10.4 INCLUDED
#335583 C=8.5 OPTION
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
STEEL Shim
DETAIL
Marked 1 strip
DO NOT use steel shim here;
use only ALU shims here.

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 Shims
8x10x1.5mm
STEEL Shim
8x10x1.5mm
STEEL Shim
DETAIL
BEARING OIL
(HUDY #106230)
BEARING OIL
(HUDY #106230)
2ND GEAR
1ST GEAR
NOTE
ORIENTATION
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
Marked 1 strip