1
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.
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
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.
XRAY Europe
K Výstavisku 6992
91101 Trenčín
Slovakia, EUROPE
Phone: +421-32-7401100
Fax: +421-32-7401109
Email: info@teamxray.com
XRAY RC America
2030 Century Center Blvd #15, Suite 109
75062 Irving
Texas, USA
Phone: (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.
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.
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.
2
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.
•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
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,
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
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
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!
•
•
•
•
•
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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.
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.
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.
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.
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.
3
SYMBOLS USED
Apply threadlock
Assemble left and right sides the same way
Apply oil (may indicate specific type)
Ensure smooth non-binding movement
Apply cyanoacrylate (CA) glue
Apply grease
Number of teeth
Part bags used
Detail
Assemble in the specified order
Cut off remaining material
Pay attention here
Assembly view
Assemble as many times as specified (here twice)
Follow tip here
Optional parts
DETAIL
TOOLS REQUIRED
Phillips 3.5mm
Slotted Screwdriver 4.0mm
Arm Reamer 3mm/4mm
Allen 1.5 / 2.0 / 2.5 / 3.0mm
Allen Ball 2.5mm
Exhaust Spring / Caster Clip Remover
Turnbuckle Tools
(HUDY #181091 3.0/4.0mm)
Turnbuckle Tools
(HUDY #181030 - 3.0mm)
Professional Multi Tool
(HUDY #183011)
Ball Joint Wrench
(HUDY #181110)
Flywheel Tool
(HUDY #182010)
Alu Pinion Gear Tool
(XRAY #349903)
Side Cutters
(HUDY #189010)
Pocket Hobby Knife
(HUDY #188981)
Wrench Glowplug/Clutchnut
(HUDY #107581)
Reamer
(HUDY #107602)
(HUDY #107601)
m
3.0 m
Pliers
(HUDY #189020)
Scissors
(HUDY #188990)
EQUIPMENT REQUIRED
4
Transmitter
Receiver
Steering & Throttle Servos
Engine
Starter Box (HUDY #104400)
& Battery Pack
Glowplug Igniter
Exhaust
Manifold
Lexan® Paint
Bodyshell
Battery Charger
Receiver Battery Pack
Wheels & Tires
Tire Truer
(HUDY #102003)
CA Glue
Engine After Run Oil
(HUDY #106250)
Model R/C Car Fuel
(nitromethane)
One-Way Lube
(HUDY #106231)
Personal Transponder
Threadlock
Air Filter
Air Filter Oil
(HUDY #106240)
Graphite Grease
(HUDY #106210)
Bearing Oil
(HUDY #106230)
1. FRONT ONE-WAY & REAR SOLID AXLE
345149
980324
345070
968120
345112
968120
345024
345800
345011
968140
345070
#345071
FRONT ONE-WAY AXLE OUTDRIVE ADAPTER - LIGHTWEIGHT (2)
BAG
01
345001
345011
345024
345070
345112
345149
345800
FRONT ONE-WAY - HARDCOATED + LIGHTWEIGHT ADAPTERS
FRONT ONE-WAY AXLE - BLACK COATED
COMPOSITE FRONT ONE-WAY AXLE PULLEY 24T
FRONT ONE-WAY AXLE OUTDRIVE ADAPTER - HUDY SPRING STEEL™ (2)
REAR SOLID AXLE SHAFT - HUDY SPRING STEEL™
COMPOSITE REAR SOLID AXLE PULLEY 48T
COMPOSITE BELT PULLEY COVER SET
968120
968140
980324
C-CLIP 12 (10)
C-CLIP 14 (10)
PIN 3x24 (10)
REAR SOLID AXLE
DETAIL
968120
C 12
NOTE ORIENTATION
980324
P 3x24
FRONT ONE-WAY AXLE
ONE-WAY LUBE
OIL
STEP
968140
C 14
DETAIL
NOTE
ORIENTATION
OIL
ONE-WAY LUBE
#345071
FRONT ONE-WAY AXLE OUTDRIVE ADAPTER - LIGHTWEIGHT (2)
5
2. REAR SUSPENSION
2x
342630
343150
343130
901306
902308
901410
343285
372651
343195
345310
306219
306219
962121
902306
901316
343111
902308
343311
980322
941218
342070
342070
941218
962120
337250
962121
ADJUSTING NUT
337253
#337253
COMPOSITE INCLUDED
#337252
ALU
345280
345360-O
OPTION
901303
PIVOT BALLS
#337250
STEEL
INCLUDED
#337251
ALU
OPTION
#337255
TITANIUM
OPTION
#345301
REAR CVD DRIVE SHAFT SET
HUDY SPRING STEEL™
#345290
ALU SHIM 12x15x1.0MM (4)
SUSPENSION UPPER ARMS
#343130 MEDIUM
INCLUDED
#343131 HARD
OPTION
#343132 GRAPHITE OPTION
#345312
ALU REAR CVD DRIVE AXLE
SWISS 7075 T6 - HARDCOATED
#345370
GRAPHITE REAR AERO DISC
1.6mm - SET
SUSPENSION LOWER ARMS
#343111 MEDIUM
INCLUDED
#343112 HARD
OPTION
#343113 GRAPHITE OPTION
BAG
02.1
6
306219
337250
337253
342070
342630
343111
343130
343150
343195
COMPOSITE SET OF SERVO SHIMS (4)
STEEL PIVOT BALL 8.4 MM (2)
COMPOSITE ADJUSTING NUT M10x1 (4)
COMPOSITE SET OF BUSHINGS (2)
ADJ. TURNBUCKLE L/R 20 MM - HUDY SPRING STEEL™ (2)
SUSPENSION ARM FOR EXTENSION - REAR LOWER
COMPOSITE SUSPENSION ARM REAR UPPER
UPPER BALL JOINT 5.8MM - SHORT & LONG (2+2)
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 HIGH-SPEED BALL-BEARING 12x18x4 RUBBER SEALED (2)
901303
901306
901316
901410
902306
902308
962120
962121
980322
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x6 (10)
HEX SCREW SB M3x16 (10)
HEX SCREW SB M4x10 (10)
HEX SCREW SH M3x6 (10)
HEX SCREW SH M3x8 (10)
WASHER S 12x15x0.5 (10)
WASHER S 12x15x1.0 (10)
PIN 3x22 (10)
2. REAR SUSPENSION
2x
4x10mm
901306
COMPOSITE SHIMS
SB M3x6
DETAIL
2.5mm
901410
2.5mm
SB M4x10
48mm
3x6x1mm
3x8mm
902306
NOTE
ORIENTATION
3x6mm
SH M3x6
3x8mm
902308
NOTE ORIENTATION
SH M3x8
Left thread
Right thread
The length of the ball joint depends on the position used on the upright. See page 8, step 2.
When you use INNER position on the upright, use SHORTER ball joint.
(INITIAL SETTING)
When you use OUTER position on the upright, use LONGER ball joint.
3x6mm
Tighten gently
Install the pivot balls with Professional Multi Tool
(HUDY #183011)
SUSPENSION LOWER ARMS
SUSPENSION UPPER ARMS
#343130 MEDIUM
INCLUDED
#343111 MEDIUM
INCLUDED
#343131 HARD
OPTION
#343112 HARD
OPTION
#343113 GRAPHITE OPTION
#343132 GRAPHITE OPTION
2x
ADJUSTING NUT
PIVOT BALLS MUST MOVE FREELY
Tighten composite hex nuts using
HUDY tool #107581
#337253 COMPOSITE INCLUDED
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.
#337252 ALU
PIVOT BALLS
DETAIL
2x
CONCENTRIC
INITIAL SETTING
CONCENTRIC
OPTION
#337250 STEEL
INCLUDED
#337251 ALU
OPTION
#337255 TITANIUM
OPTION
ECCENTRIC
DETAIL
12x15x1mm
941218
BB 12x18x4
BEARING OIL
OIL
NOTE ORIENTATION
When using eccentric bushings, both
bushings must be in same position.
962120
S 12x15x0.5
962121
S 12x15x1.0
#345290
ALU SHIM 12x15x1.0MM (4)
INITIAL SETTING
COMPOSITE SET OF BUSHINGS
BEARING OIL
OIL
SHIM
IN
1+1
1+0.5
1
0.5
0
SHIM
OUT
INITIAL SETTING
0.5
1
1+0.5
1+1
1+1+0.5
12x15x0.5mm
#345301
REAR CVD DRIVE SHAFT SET
HUDY SPRING STEEL™
#345312
ALU REAR CVD DRIVE AXLE
SWISS 7075 T6 - HARDCOATED
7
2. REAR SUSPENSION
901303
2x
SB M3x3
DETAIL
CENTERED
980322
P 3x22
TIGHTEN GENTLY
TIGHTEN FULLY
CUTAWAY VIEW
2x
306219
SHIM 3x6x2
6mm
901316
SB M3x16
INITIAL POSITION
OUTER
3x6x2mm
COMPOSITE SHIMS
2x
3.6mm
DETAIL
3.4mm
8
2. REAR SUSPENSION
343045
902308
902308
343015
343045
901303
343025
334052
981208
940508
902314
343069
903408
941218
342070
345450
343052
343071
344042
902306
903308
940508
902320
352070
940815
343083
903408
344012
303130-O 303123-O
344131
903310
902322
902310
347322
296530-O
343043
342316
303130-O
903310
344110
344120
372176
903308
902320
344120
342317
342316
343042
343721
345320
940815
901405
965090
344022
345820
343711
903310
347310
342317
903408
903408
344142
345510
903406
341105
#344111
VENTILATED BRAKE DISC
PRECISION-GROUND
LIGHTWEIGHT
#345301
REAR CVD DRIVE SHAFT SET HUDY SPRING STEEL™
#345452
LOW-FRICTION KEVLAR®
DRIVE BELT REAR
8.0x204mm
BAG
02.2
296530-O
303123-O
303130-O
334052
341105
342070
342316
342317
343015
343025
343042
343043
343045
343052
343069
343071
343083
343711
343721
344012
344022
344042
344110
344120
344131
344142
ALU NUT M3 - ORANGE (10)
ALU SHIM 3x6x2.0MM - ORANGE (10)
ALU SHIM 3x6x9.0MM - ORANGE (10)
COMPOSITE BRAKE UPPER PLATE
CHASSIS 5MM - CNC MACHINED - SWISS 7075 T6
COMPOSITE SET OF BUSHINGS (2)
COMPOSITE REAR UPPER SUSP. ECCENTRIC BUSHING (4)
COMPOSITE REAR LOWER SUSP. ECCENTRIC BUSHING (4)
ALU LOWER BULKHEAD REAR - SWISS 7075 T6 - RIGHT
ALU LOWER BULKHEAD REAR - SWISS 7075 T6 - LEFT
GRAPHITE REAR UPPER ARM HOLDER 3.5MM - FRONT
GRAPHITE REAR UPPER ARM HOLDER 3.5MM - REAR
ALU UPPER CLAMP REAR - SWISS 7075 T6 - (L+R)
GRAPHITE REAR BULKHEAD BRACE 2.5MM
STEEL BUSHING (2)
BELT TENSIONER SET - STEEL
GRAPHITE SHOCK TOWER REAR
ALU REAR LOWER SUSPENSION HOLDER - FRONT - RF
ALU REAR LOWER SUSPENSION HOLDER - REAR - RR
ALU BRAKE STAND - SWISS 7075 T6 - SET
ALU 2-SPEED HOLDER - SWISS 7075 T6
BRAKE CAM POST - STEEL
VENTILATED BRAKE DISC - PRECISION-GROUND
STEEL BRAKE PAD - HARDENED (2)
BRAKE PAD “SLS” (2)
BRAKE DISK ADAPTER - SWISS 7075 T6 - BLACK HARDCOATED
#345920
ALU 2-SPEED BELT PULLEY
20T - CENTER - SET
345320
345450
345510
345820
347310
347322
352070
372176
REAR DRIVE SHAFT 61MM - HUDY SPRING STEEL™
PUR® REINFORCED DRIVE BELT REAR 8.0 x 204 MM
2-SPEED SHAFT 8MM - SUPER LIGHTWEIGHT - HUDY SPRING STEEL™
COMPOSITE 2-SPEED BELT PULLEY 20T - CENTER
REAR LOWER INNER PIVOT PIN (2)
REAR UPPER INNER PIVOT PIN WITH FLAT SPOT (2)
COMPOSITE BEARING HUB FOR DIFF (4)
SPRING 4.25 COILS 3.6x6x0.4MM; C=1.5 - GOLD (SOFT) (2)
901303
901405
902306
902308
902310
902314
902320
902322
903308
903310
903406
903408
940508
940815
941218
965090
981208
HEX SCREW SB M3x3 (10)
HEX SCREW SB M4x5 (10)
HEX SCREW SH M3x6 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x14 (10)
HEX SCREW SH M3x20 (10)
HEX SCREW SH M3x22 (10)
HEX SCREW SFH M3x8 (10)
HEX SCREW SFH M3x10 (10)
HEX SCREW SFH M4x6 (10)
HEX SCREW SFH M4x8 (10)
HIGH-SPEED BALL-BEARING 5x8x2.5 RUBBER SEALED (2)
HIGH-SPEED BALL-BEARING 8x14x4 RUBBER SEALED (2)
HIGH-SPEED BALL-BEARING 12x18x4 RUBBER SEALED (2)
E-CLIP 9 (10)
PIN 2x8 (10)
9
2. REAR SUSPENSION
903408
SFH M4x8
NOTE
ORIENTATION
DETAIL
NOTE ORIENTATION
Both bushings must be in same position
NOTE ORIENTATION
BEARING OIL
941218
BB 12x18x4
BEARING OIL
NOTE ORIENTATION
Both bushings must be in same position
#345452
LOW-FRICTION KEVLAR®
DRIVE BELT REAR
8.0 x 204 MM
DETAIL
COMPOSITE SET OF BUSHINGS
NOTE
ORIENTATION
L=R
REAR BELT TENSION
ADJUSTMENT
INITIAL POSITION
DETAIL
902308
SH M3x8
B
A
TO TIGHTEN REAR BELT: Rotate both rear composite hubs in arrow direction B
TO LOOSEN REAR BELT: Rotate both rear composite hubs in arrow direction A
Use white mark on tab for better visibility
of composite hub position.
10
COMPOSITE
BUSHING
2. REAR SUSPENSION
903310
SFH M3x10
903308
SFH M3x8
903406
SFH M4x6
903408
SFH M4x8
INITIAL SETTING
NOTE
The upper roll center positions cannot be
used. Use always low or medium roll center
positions ONLY.
NOTE
ORIENTATION
4x8mm
4x6mm
4x8mm
11
2. REAR SUSPENSION
902310
SH M3x10
#345301
REAR CVD DRIVE SHAFT SET HUDY SPRING STEEL™
903408
SFH M4x8
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.
ARM REAMER
INITIAL SETTING
NOTE
The upper roll center positions cannot be
used. Use always low or medium roll center
positions ONLY.
2x
DETAIL
INITIAL SETTING
DETAIL
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
12
NOTE ORIENTATION
TIGHTEN FULLY
set-screw M3x6 onto flatspot
2. REAR SUSPENSION
296530-O
N M3
FIBRE PADS FACE
TOGETHER
3x6x2mm
303123-O
SHIM 3x6x2
DETAIL
10mm
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.
902322
SH M3x22
3x6x2mm
HOLE - ROUND
NOTE ORIENTATION
HOLE - OVAL
HOLE - OVAL
903310
SFH M3x10
NOTE ORIENTATION
BEARING OIL
NOTE ORIENTATION
940508
8x14x4mm
BB 5x8x2.5
BEARING OIL
NOTE ORIENTATION
940815
BEARING WITH BLUE COVERS
BEARING OIL
5x8x2.5
8x14x4mm
BB 8x14x4
➋
➊
965070
C7
#345920
ALU 2-SPEED BELT PULLEY 20T
CENTER - SET
13
2. REAR SUSPENSION
901405
SB M4x5
STEP ➍ DETAIL
Tighten set-screw onto flat spot.
➍
➊
➌
NOTE ORIENTATION
#344111
VENTILATED BRAKE DISC
- PRECISION - GROUND LIGHTWEIGHT
901303
SB M3x3
These screws are part of the
REAR SUSPENSION MULTI-FLEX™ TECHNOLOGY
(see page 15)
3x3mm
3x8mm
Pin must protrude equally
on both sides of camshaft
902306
SH M3x6
3x6mm
902308
SH M3x8
940508
BB 5x8x2.5
981208
P 2x8
902314
SH M3x14
903308
SFH M3x8
14
3x8mm
BEARING OIL
BEARING WITH BLUE COVERS
3x6mm
DETAIL
2. REAR SUSPENSION
303130-O
SHIM 3x6x9
3x6x9mm
3x6x9mm
902320
SH M3x20
REAR SUSPENSION MULTI-FLEX™TECHNOLOGY
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.
ALTERNATIVE 1
SOFT
ALTERNATIVE 2
MEDIUM
ALTERNATIVE 3
STIFF
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.
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)
15
2. REAR SUSPENSION
341360
902314
901305
940508 901303
343481-K
341380
341360
901305
901303
343458
940508
341331
302080
901304
333461
362650
341370
902310
347330
302663
302291
902310
302291
#341381 GRAPHITE REAR BODY
CENTERING PLATE - SET
REAR ANTI-ROLL BARS
#343456
2.6mm OPTION
#343458
2.8mm INCLUDED
#343460
3.0mm OPTION
BAG
02.3
302080
302291
302663
333461
341331
341360
341370
341380
343458
343481-K
347330
362650
CASTER CLIPS SET 4+3+2+1 MM (2)
STEEL STEERING BUSHING (2+2)
COMPOSITE BALL JOINT 4.9MM - OPEN - V2 (8)
COMPOSITE ANTI-ROLL BAR BALL JOINT 4.9 MM - V3 (4)
COMPOSITE REAR BODY HOLDER - HIGHER
COMPOSITE REAR BODY HOLDER SCREW (2)
COMPOSITE REAR BODY HOLDER ARM
COMPOSITE REAR BODY CENTERING PLATE
ANTI-ROLL BAR REAR 2.8 MM
ALU CUTTED ANTI-ROLL BAR COLLAR - BLACK (2)
REAR BODY HOLDER ARM PIN (2)
BALL END 4.9MM WITH THREAD 6MM (2)
901303
901304
901305
902310
902314
940508
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x4 (10)
HEX SCREW SB M3x5 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x14 (10)
HIGH-SPEED BALL-BEARING 5x8x2.5 RUBBER SEALED (2)
26mm
6mm THREAD
DETAIL
DETAIL
16
2. REAR SUSPENSION
REAR ANTI-ROLL BARS
940508
BB 5x8x2.5
BEARING OIL
#343456
2.6mm OPTION
#343458
2.8mm INCLUDED
#343460
3.0mm OPTION
BEARING OIL
BEARING WITH BLUE COVERS
3x4mm
901303
SB M3x3
901304
3x3mm
SB M3x4
3x4mm
CENTER
DETAIL
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.
DETAIL
If the sides still do not move
at the same time, adjust the
length of the bar holders.
DETAIL
Set the bar into the center, remove the play in the
bushings, and tighten the setscrews fully.
17
2. REAR SUSPENSION
MOVE FREELY
902310
SH M3x10
INITIAL SETTING
DETAIL
MOVE FREELY
901305
SB M3x5
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
INITIAL SETTING
SHIMS (STEP )
DETAIL
2mm
Distance according to bodyshell
DETAIL
2mm
INITIAL SETTING
902314
SH M3x14
#341381 GRAPHITE REAR BODY
CENTERING PLATE - SET
18
3. REAR TRANSMISSION
GEAR BOX SPRING
#335581 C=7.8
OPTION
#335582 C=10.4 OPTION
#335583 C=8.5
INCLUDED
965070
335582
908262
#345591-O
ALU 2-SPEED SHAFT LOCATING COLLAR
- LIGHTWEIGHT - ORANGE
335540
345838
345800
901305
983404
345800
980314
345571
903306
345592-K
345522
981310
983404
335655
950812
345531
335659
950812
345593
908262
1ST GRAPHITE 2-SPEED GEARS
903306
335657
57T (1st)
335658
58T (1st)
OPTION
335659
59T (1st)
INCLUDED
335660
60T (1st)
OPTION
965070
OPTION
2ND GRAPHITE 2-SPEED GEARS
BAG
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-KALU 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
903306
908262
950812
965070
980314
981310
983404
335653
53T (2nd)
335654
54T (2nd)
OPTION
OPTION
335655
55T (2nd)
INCLUDED
HEX SCREW SB M3x5 (10)
HEX SCREW SFH M3x6 (10)
HEX SCREW SOCKET HEAD CAP M2.5x12 (10)
BALL-BEARING 8x12x3.5 FLANGED (2)
E-CLIP 7 (10)
PIN 3x14 (10)
PIN 3x10 (10)
ROLLER PIN 4x4 MM (2)
STEEL Shim
DETAIL
Marked 1 strip
DO NOT use steel shim here;
use only ALU shims here.
345592-K
ALU SHIM 8x10x1.5
STEP ➌ DETAIL
ALU Shims 8x10x1.5mm
NOTE ORIENTATION
Use the belt pulley cover 18T
with hole diameter of 10mm
➋
➊
965070
C7
NOTE
ORIENTATION
➎
➌
18
8mm
➍
➏
STEP ➊ DETAIL
980314
P 3x14
7.5mm
#345591-O
ALU 2-SPEED SHAFT LOCATING COLLAR
- LIGHTWEIGHT - ORANGE
19
3. REAR TRANSMISSION
SB M3x5
SHIFT-POINT SCREW
➎
NOTE
ORIENTATION
901305
➍
SHOE-GAP SET-SCREW
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.
➊
NOTE
ORIENTATION
908262
SCH M2.5x12
➌
➋
➋
NOTE
ORIENTATION
➊
983404
Set-screws must NOT protrude
DETAIL
RP 4x4
Top of screw head
should be level with
hole bottom edge
➍
➎
GEAR BOX SPRING
#335581 C=7.8
OPTION
#335582 C=10.4 OPTION
#335583 C=8.5
INCLUDED
Do not overtighten gap-setting set-screws. Only
tighten until roller pins contact the center hub.
2ND GEAR
1ST GEAR
NOTE
ORIENTATION
903306
SFH M3x6
NOTE
ORIENTATION
BEARING OIL
950812
BB 8x12x4
BEARING OIL
55
ONE-WAY LUBE
59
Use HUDY Reamer #107600 to slightly chamfer
the edges on all 3 screw holes from inside.
Use HUDY Reamer #107600 to slightly chamfer
the edges on all 3 screw holes from inside.
STEEL Shim
DETAIL
Marked 1 strip
345592-K
ALU SHIM 8x10x1.5
NOTE
ORIENTATION
➊
NOTE
ORIENTATION
345593
STEEL SHIM 8x10x1.5
ALU Shims
8x10x1.5mm
➌
NOTE
ORIENTATION
965070
C7
981310
P 3x10
55
STEEL Shim
8x10x1.5mm
59
20
1ST GEAR
2ND GEAR
1ST GRAPHITE 2-SPEED GEARS
2ND GRAPHITE 2-SPEED GEARS
See page19, exploded view
➋
4. FRONT SUSPENSION
#345270
GRAPHITE FRONT
AERODYNAMIC DISC
1.6mm - SET
#342401-O
DOWNSTOP INDEPENDENT
ALU FRONT ANTI-ROLL
BAR - ORANGE
901303
345230
980262
980320
345220
941218
345210
342224
342070
962121
342214
941218
342070
962121
337250
345280
962120
342291
902308
345260-O
901303
337253
342412
961032
901306
902320
342114
342440
902320
901308
342134
342450
342196
901308
902308
903306
FRONT SUSPENSION UPPER ARMS
#342131
MEDIUM
OPTION
#342132
HARD
OPTION
#342133
GRAPHITE
OPTION
#342134
SOFT
INCLUDED
FRONT SUSPENSION LOWER ARMS
#342114 MEDIUM
INCLUDED
#342115 GRAPHITE OPTION
STEERING BLOCKS
#342214
RIGHT
INCLUDED
#342215
RIGHT
OPTION
#342224
LEFT
INCLUDED
#342225
LEFT
OPTION
337250
337253
342070
342114
342134
342196
342214
342224
342291
342412
342440
342450
345210
345220
345230
STEEL PIVOT BALL 8.4 MM (2)
COMPOSITE ADJUSTING NUT M10x1 (4)
COMPOSITE SET OF BUSHINGS (2)
SUSPENSION ARM FOR WIRE ANTI-ROLL BAR - FRONT
COMPOSITE SUSPENSION ARM FRONT UPPER - SHORT - SOFT
STEEL EXTENSION FOR SUSPENSION ARM - FRONT LOWER (L+R)
COMPOSITE STEERING BLOCK FOR AERO DISC - RIGHT
COMPOSITE STEERING BLOCK FOR AERO DISC - LEFT
ALU EXTENSION FOR STEERING BLOCK - SWISS 7075 T6 (2)
COMPOSITE FRONT ANTI-ROLL BAR HOLDERS
ANTI-ROLL BAR FRONT FEMALE - HUDY SPRING STEEL™
ANTI-ROLL BAR FRONT MALE - HUDY SPRING STEEL™
FRONT WHEEL AXLE - HUDY SPRING STEEL™
FRONT CVD DRIVE SHAFT 71MM - HUDY SPRING STEEL™
DRIVE SHAFT COUPLING - HUDY SPRING STEEL™
BAG
04.1
#345212
ALU FRONT CVD DRIVE AXLE - SWISS
7075 T6 - HARDCOATED
345260-O ALU FRONT WHEEL LOCK - SWISS 7075 T6 - ORANGE (2)
345280
WHEEL SPRING (2)
901303
901306
901308
902308
902320
903306
941218
961032
962120
962121
980262
980320
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x6 (10)
HEX SCREW SB M3x8 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x20 (10)
HEX SCREW SFH M3x6 (10)
HIGH-SPEED BALL-BEARING 12x18x4 RUBBER SEALED (2)
WASHER S 3.2 (10)
WASHER S 12x15x0.5 (10)
WASHER S 12x15x1.0 (10)
PIN 2.5x12 (10)
PIN 3x20 (10)
21
4. FRONT SUSPENSION
2x
ADJUSTING NUT
#337253
COMPOSITE INCLUDED
#337252
ALU
OPTION
#337250
STEEL
INCLUDED
#337251
ALU
OPTION
#337255
TITANIUM
OPTION
PIVOT BALLS
PIVOT BALLS MUST MOVE FREELY
Tighten the composite hex nuts
using HUDY tool #107581
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.
STEERING BLOCKS
#342214
RIGHT
INCLUDED
#342215
RIGHT
OPTION
#342224
LEFT
INCLUDED
#342225
LEFT
OPTION
2x
902308
SH M3x8
NOTE ORIENTATION
2x
901303
1.5m
m
SB M3x3
DETAIL
980262
P 2.5x12
Tighten the screw fully when
the pin is installed.
STEP
DETAIL
THREAD
LOCK
Tighten
gently
22
Tighten
fully
GRAPHITE GREASE
(HUDY # 106210)
#345212 ALU FRONT CVD
DRIVE AXLE - SWISS 7075 T6 HARDCOATED
4. FRONT SUSPENSION
2x
DETAIL
12x15x1mm
941218
INITIAL
SETTING
INITIAL
SETTING
BB 12x18x4
Eccentric
Concentric
BEARING OIL
INNER
1+1
1+0.5
1
0.5
0
BEARING
OIL
12x15x0.5mm
NOTE ORIENTATION
When using eccentric bushings, both
bushings must be in same position
962121
S 12x15x1.0
SHIM
SHIM
OUTER
INITIAL SETTING
0.5
1
1+0.5
1+1
1+1+0.5
962120
S 12x15x0.5
INITIAL SETTING
COMPOSITE SET OF BUSHINGS
#345290
ALU SHIM 12x15x1.0mm
2x
901303
SB M3x3
DETAIL
CENTERED
980320
P 3x20
Tighten gently
Tighten fully
CUTAWAY VIEW
2x
5.4mm
DETAIL
4.8mm
FRONT SUSPENSION UPPER ARMS
#342131
MEDIUM
OPTION
#342132
HARD
OPTION
FRONT SUSPENSION LOWER ARMS
#342133
GRAPHITE
OPTION
#342114
MEDIUM
INCLUDED
INCLUDED
#342115
GRAPHITE
OPTION
#342134
SOFT
23
4. FRONT SUSPENSION
IMPORTANT
Install all mount parts, regardless of the type of front
anti-roll bar used (blade or wire). See page 27.
ALTERNATIVE 2: BLADE ANTI-ROLL BAR
Install these blade parts ONLY when using the blade-type front anti-roll bar. See page 27.
DO NOT install the blade parts when using the wire-type front anti-roll bar.
DETAIL
901308
SB M3x8
NOTE
ORIENTATION
1. Pre-thread mount with the set-screw.
2. After anti-roll bar is inserted, install and
tighten the set-screw. (see page 27 / step 1)
902320
SH M3x20
961032
S 3.2
NOTE
ORIENTATION
3.2x6.7x0.5mm
#342401-O
DOWNSTOP INDEPENDENT ALU FRONT
ANTI-ROLL BAR - ORANGE
2x
901306
SB M3x6
TIGHTEN GENTLY, tighten fully when the
drive pins are assembled. (Page 29, step 1)
2x
902308
SH M3x8
DETAIL
903306
SFH M3x6
24
4. FRONT SUSPENSION
345430
FRONT ANTI-ROLL BARS
#342470 ø2.0mm
OPTION
#342472
ø2.2mm
OPTION
#342474
ø2.4mm
OPTION
#342476
ø2.6mm
INCLUDED
#342478
ø2.8mm
OPTION
#345432
LOW-FRICTION KEVLAR® DRIVE BELT
FRONT 6.0x204mm
342070
345001
941218
342032
342014
342084
342042
902308
342045
342045
902308
903306
901303
342170
901304
342476
940508
343481-K
901410
342024
333461
362650
902310
902310
903408
302663
341322
372651
342315
962032
337311
302080
342315
302080
342711
960040
347212
342180
341201
302293
903406
342711
302293
902410
903412
903406
BAG
04.2
302080 COMPOSITE CASTER CLIPS SET 4+3+2+1 MM (2)
302293 C-HUB BUSHING COMPOSITE - V2 (4)
302663 COMPOSITE BALL JOINT 4.9MM - OPEN - V2 (8)
333461 COMPOSITE ANTI-ROLL BAR BALL JOINT 4.9 MM - V3 (4)
337311 PIVOT PIN WITH FLAT SPOT (2)
341201 COMPOSITE BUMPER - DOWNFORCE
341322 ALU FRONT BODY POST - SHORT - SWISS 7075 T6 (2)
342014 ALU LOWER BULKHEAD FRONT - SWISS 7075 T6 - RIGHT
342024 ALU LOWER BULKHEAD FRONT - SWISS 7075 T6 - LEFT
342032 ALU UPPER ARM HOLDER RIGHT - SWISS 7075 T6 - SET
342042 ALU UPPER ARM HOLDER LEFT - SWISS 7075 T6 - SET
342045 ALU UPPER CLAMP FRONT - SWISS 7075 T6 - (L+R)
342070 COMPOSITE SET OF BUSHINGS (2)
342084 GRAPHITE SHOCK TOWER FRONT
342170 COMPOSITE SUSPENSION ARM DOWNSTOP (2)
342180 COMPOSITE LOWER SUSP. ARM CLIPS (2)
342315 COMPOSITE FRONT UPPER SUSP. ECCENTRIC BUSHING (4)
342476 ANTI-ROLL BAR FRONT 2.6 MM
342711 ALU LOWER FRONT SUSPENSION HOLDER (1) - SWISS 7075 T6
343481-K ALU CUTTED ANTI-ROLL BAR COLLAR - BLACK (2)
345430 PUR® REINFORCED DRIVE BELT FRONT 6.0 x 204 MM
347212
362650
372651
FRONT LOWER INNER PIVOT PIN (2)
BALL END 4.9MM WITH THREAD 6MM (2)
PIVOT BALL UNIVERSAL 4.9 MM - HUDY SPRING STEEL (2)
901303
901304
901410
902308
902310
902410
903306
903406
903408
903412
940508
941218
960040
962032
HEX SCREW SB M3x3 (10)
HEX SCREW SB M3x4 (10)
HEX SCREW SB M4x10 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M4x10 (10)
HEX SCREW SFH M3x6 (10)
HEX SCREW SFH M4x6 (10)
HEX SCREW SFH M4x8 (10)
HEX SCREW SFH M4x12 (10)
HIGH-SPEED BALL-BEARING 5x8x2.5 RUBBER SEALED (2)
HIGH-SPEED BALL-BEARING 12x18x4 RUBBER SEALED (2)
NUT M4 (10)
WASHER S 3x6x0.2 (10)
345001
FRONT ONE-WAY - HARDCOATED + LIGHTWEIGHT ADAPTERS
25
4. FRONT SUSPENSION
2x
NOTE
ORIENTATION
901410
SB M4x10
NOTE
ORIENTATION
NOTE
ORIENTATION
DETAIL
NOTE
ORIENTATION
902310
SH M3x10
DETAIL
3.5mm
903408
SFH M4x8
NOTE
ORIENTATION
BEARING OIL
NOTE
ORIENTATION
NOTE
ORIENTATION
Both bushings must
be in same position
941218
BB 12x18x4
INITIAL SETTING
COMPOSITE SET OF BUSHINGS
#345432
LOW FRICTION KEVLAR DRIVE
BELT FRONT 6.0x204mm
BEARING OIL
2x
902308
SH M3x8
NOTE
ORIENTATION
DETAIL
903306
SFH M3x6
26
NOTE
ORIENTATION
NOTE
ORIENTATION
4. FRONT SUSPENSION
The RX8 kit comes with both types of front anti-roll bars; blade-style or wire. Decide which anti-roll bar to use.
Blade anti-roll bar (Alternative 1)
page 27
Wire anti-roll bar (Alternative 2)
go to page 28
is recommended for long, fast tracks when maximum cornering speed is needed. With the blade anti-roll bar, the car will not dive in the corners and will
maintain maximum speed. Follow the “Alternative 1“ assembly steps (immediately below).
is recommended for smaller, technical tracks when fast direction changes and side weight changes are needed. Follow the “Alternative 2“
assembly steps starting on page 28; DO NOT assemble the blade bars as described immediately below.
ALTERNATIVE 1 (BLADE ANTI-ROLL BAR)
Pre-thread mount with the set-screw
901308
SB M3x8
NOTE ORIENTATION
After anti-roll bar is inserted, install and
tighten the set-screw
Blade parts may have been installed
earlier, see page 24.
903406
SFH M4x6
FORWARD ARM POSITION
Shim behind arm
2mm
(INITIAL SETTING)
REARWARD ARM POSITION
Shim in front of arm
HUDY GRAPHITE GREASE #106210
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.
ARM REAMER
Forward arm
position
DETAIL
Rearward arm
position
DETAIL
When the bar is 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. If the arms still do not move at the same time, gently
loosen the screw which holds eccentric bushing and adjust the bushing until both arms move at the same time.
IMPORTANT!
The position of the front arm directly influences the steering
Ackermann (angle of the steering linkages). When the arm is moved
to rearward position (shim in front of the arm), the angle of the
steering linkages changes and gives less Ackermann. By decreasing the
Ackermann, the car gets more turn-in & increased steering at corner
exit, but less cornering speed. The Ackermann can be changed by the
Quick-Saver™ (see page 33).
DETAIL
Do not insert ball into cup too deeply
or bars will bind during operation
1.5mm
Ensure that the suspension arms move freely. Ensure that the eccentric holders move freely.
Each anti-roll bar blade has a hex hole at its end.
Use a 1.5mm hex wrench to adjust the blades.
27
4. FRONT SUSPENSION
ALTERNATIVE 2 (WIRE ANTI-ROLL BAR)
28mm
6mm THREAD
903406
SFH M4x6
FORWARD ARM POSITION
Shim behind arm.
2mm
(INITIAL SETTING)
REARWARD ARM POSITION
Shim in front of arm
Forward arm
position
Rearward
arm position
DETAIL
HUDY GRAPHITE GREASE #106210
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.
ARM REAMER
DETAIL
IMPORTANT!
The position of the front arm directly influences the steering Ackermann (angle of the steering linkages). When the arm is moved to rearward position (shim in front of the arm), the
angle of the steering linkages changes and gives less Ackermann. By decreasing the Ackermann, the car gets more turn-in & increased steering at corner exit, but less cornering speed.
The Ackermann can be changed by the Quick-Saver™ (see page 33).
NOTE
ORIENTATION
902308
SH M3x8
962032
SHIM 3x6x0.2
1mm
3x6x0.2mm
2mm
This shim should be used ONLY with the SOFT arm
included in the kit.
When using other optional arms - medium, hard, or
graphite - DO NOT use this shim.
4mm
INITIAL SETTING
FRONT SUSPENSION UPPER ARMS
COMPOSITE SET OF
BUSHINGS
28
(INITIAL SETTING)
Use 0mm suspension holders
MEDIUM
OPTION
DO NOT use 0.2mm shim
HARD
OPTION
DO NOT use 0.2mm shim
GRAPHITE OPTION
DO NOT use 0.2mm shim
SOFT
INCLUDED
USE this shim
4. FRONT SUSPENSION
DETAIL
NOTE ORIENTATION
TIGHTEN FULLY
902310
SH M3x10
FRONT ANTI-ROLL BARS
#342470 ø2.0mm
OPTION
940508
BB 5x8x2.5
#342472
ø2.2mm
OPTION
#342474
ø2.4mm
OPTION
#342476
ø2.6mm
INCLUDED
#342478
ø2.8mm
OPTION
BEARING WITH BLUE COVERS
BEARING OIL
BEARING OIL
29
4. FRONT SUSPENSION
3x4mm
901303
SB M3x3
3x3mm
901304
3x4mm
SB M3x4
DETAIL
DETAIL
CENTER
Set the bar into the center, remove the play in the bushings, and
tighten the set-screws fully.
DETAIL
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.
If the sides still do not move at the same time, adjust the length
of the bar holders.
If the sides still do not move
at the same time, adjust the
length of the bar holders.
NOTE ORIENTATION
902410
SH M4x10
903412
SFH M4x12
960040
N M4
30
NOTE ORIENTATION
5. FRONT TRANSMISSION
346232
901408
901408
965050
345800
343072
903308
962060
950510
903308
335790
345858
335790
940613
303123-O
343069
981262
FRONT BELT PULLEY CENTER
#345858 18T COMPOSITE INCLUDED
902314
#345958 18T ALU
345440
345723
902308
#345441
LOW-FRICTION KEVLAR® DRIVE BELT
SIDE 6.0x432mm
903306
OPTION
FRONT SIDE BELT PULLEY
#345888 28T COMPOSITE INCLUDED
940613
345712
#345889 29T COMPOSITE INCLUDED
345732-O
345888
345889
345800
#345988 28T ALU
OPTION
#345989 29T ALU
OPTION
#345990 30T ALU
OPTION
965050
BAG
303123-O
335790
343069
343072
345440
345712
345723
345732-O
345800
345858
345888
345889
ALU SHIM 3x6x2.0MM - ORANGE (10)
COMPOSITE BALL-BEARING BUSHING FOR MIDDLE SHAFT (2)
STEEL BUSHING (2)
BELT TENSIONER SET - STEEL
PUR® REINFORCED DRIVE BELT SIDE 6.0 x 432 MM
FRONT MIDDLE SHAFT - LIGHTWEIGHT - HUDY SPRING STEEL™
ALU FRONT MIDDLE SHAFT HOLDER
ALU MIDDLE SHAFT LOCATING COLLAR - SHORT - LIGHTWEIGHT - ORANGE
COMPOSITE BELT PULLEY COVER SET
COMPOSITE FRONT BELT PULLEY 18T ø6 - CENTER
COMPOSITE SIDE BELT PULLEY 28T - FRONT
COMPOSITE SIDE BELT PULLEY 29T - FRONT
346232
ALU RADIO PLATE MOUNT - SWISS 7075 T6 (2)
901408
902308
902314
903306
903308
940613
950510
962060
965050
981262
HEX SCREW SB M4x8 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x14 (10)
HEX SCREW SFH M3x6 (10)
HEX SCREW SFH M3x8 (10)
HIGH-SPEED BALL-BEARING 6x13x5 RUBBER SEALED (2)
BALL-BEARING 5x10x4 FLANGED (2)
WASHER S 6x8x0.5 (10)
E-CLIP 5 (10)
PIN 2.5x12 (10)
BEARING
OIL
BEARING
OIL
940613
BB 6x13x5
18
FRONT BELT PULLEY CENTER
#345858 18T COMPOSITE INCLUDED
962060
SHIM 6x8x0.5
965050
C5
981262
P 2.5x12
#345958 18T ALU
6x8x0.5mm
STEP
DETAIL
NOTE
ORIENTATION
Use the belt pulley cover 18T
with hole diameter of 9mm.
OPTION
DETAIL
STEP
DETAIL
965050
C5
INITIAL SETTING
29
981262
NOTE
ORIENTATION
P 2.5x12
FRONT SIDE BELT PULLEY
#345888 28T COMPOSITE INCLUDED
#345889 29T COMPOSITE INCLUDED
Use the belt pulley cover 29T
#345988 28T ALU
OPTION
#345989 29T ALU
OPTION
#345990 30T ALU
OPTION
31
5. FRONT TRANSMISSION
DETAIL
902308
SH M3x8
Adjust the tension of the front & side belt
by moving the front middle shaft holder.
TIGHTEN GENTLY
NOTE
ORIENTATION
901408
SB M4x8
903308
TIGHTEN GENTLY
SFH M3x8
303123-O
SHIM 3x6x2
3x6x2mm
NOTE
ORIENTATION
THREADLOCK
902314
SH M3x14
BEARING OIL
903306
SFH M3x6
STEP
950510
BB 5x10x4
32
DETAIL
TO ADJUST THE BELT TENSIONER:
1. Loosen upper screw
2. Move belt tensioner as needed
3. Re-tighten upper screw
#345441
LOW-FRICTION KEVLAR® DRIVE BELT
SIDE 6.0x432mm
6. STEERING
301159-O
342501
940508
903312
342510
352648
307455
333240
901310
342510
302663
303123-O
332561
902308
902310
332540
352648
970100
332660
342501
#342511-O
Alu Adjustable Servo Saver
- Swiss 7075 T6 - Orange
333240
940508
902308
303123-O
902308
BAG
301159-O ALU COUNTERSUNK SHIM - ORANGE (4)
302663 COMPOSITE BALL JOINT 4.9MM - OPEN - V2 (8)
303123-O ALU SHIM 3x6x2.0MM - ORANGE (10)
307455 PIVOT BALL 4.9 MM DOUBLE BEVEL SHOULDERS (10)
332540 ALU SERVO SAVER ADJUSTABLE NUT
332561 SERVO SAVER SPRING C=14
332660 COMPOSITE STEERING & SERVO BALL JOINT 5.8 MM (4+2)
333240 BALL UNIVERSAL 5.8 MM HEX (4)
342501 SERVO SAVER COMPLETE SET
342510 COMPOSITE SERVO SAVER
352648 ADJ. TURNBUCKLE M3 L/R 62 MM - HUDY SPRING STEEL (2)
901310
902308
902310
903312
940508
970100
HEX SCREW SB M3x10 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SFH M3x12 (10)
HIGH-SPEED BALL-BEARING 5x8x2.5 RUBBER SEALED (2)
O-RING 10 x 1.5 (10)
USE ONLY ACKERMANN POSITIONS 1 OR 2.
DO NOT use Ackerman positions 3 or 4; these can be used ONLY
after modifying the ball joint & one-way pulley so that they do
not touch.
901310
SB M3x10
4
3
2
1
DETAIL
3-4mm
INITIAL PRELOAD
3.0mm
903312
SFH M3x12
THERE ARE 4 DIFFERENT ACKERMANN SETTINGS POSSIBLE WITH THE QUICK-SAVER™
970100
DETAIL
For initial Ackermann setting, use Step 1 (2nd shortest length).
O 10x1.5
DETAIL
4
3
2
1
1 STEP OUT
INITIAL SETTING
STEP 1 gives the most Ackermann and makes the car
understeer more into & out of corners. It offers good
cornering speed and creates very good traction mainly
in chicanes, because the car will be more stable.
Recommended for tracks with long sweepers where a
lot of cornering speed is needed.
4 4 STEPS OUT
3
2
1
STEP 4 gives the least Ackermann and creates a lot
of steering into & out of corners. However, the car is
more difficult to drive in chicanes because there is less
traction and stability.
Recommended for tracks where a lot of in-corner
steering is needed.
BEARING OIL
STEP ➊ DETAIL
#342511-O
Alu Adjustable Servo Saver
- Swiss 7075 T6 - Orange
33
6. STEERING
NOTE
ORIENTATION
NOTE ORIENTATION
NOTE ORIENTATION
42.5mm
42.5mm
BALL JOINT WRENCH
(HUDY #181110)
Install the pivot balls with Professional
Multi Tool (HUDY #183011)
NOTE
ORIENTATION
NOTE
ORIENTATION
902310
SH M3x10
BEARING WITH BLUE COVERS
BEARING OIL
902308
SH M3x8
BEARING WITH BLUE COVERS
940508
BB 5x8x2.5
BEARING OIL
➊
DETAIL
303123-O
SHIM 3x6x2
INITIAL SETTING
902308
SH M3x8
3x6x2mm
By adding shims, the car becomes
less responsive, but easier to drive.
34
7. FUEL TANK & ELECTRONICS
902312
306310
346190
902308
907206
Throttle servo
(NOT INCLUDED)
902310
903306
336183
902310
346182-O
903306
336000
346181
902308
336000
336120
902308
348603
902306
336000
346113
907258
346200
902312
346200
348660
Servo grommet (NOT INCLUDED)
303241
Battery pack
(NOT INCLUDED)
902306
336200
901316
348603
303144-O
902310
970045
332660
Steering servo (NOT INCLUDED)
389400
348603
348603
902308
336151
303241
Servo screw
(NOT INCLUDED)
HUDY ALU SERVO HORNS
#293491 23T KO Propo, Airtronics, JR, Sanwa OPTION
#293492 24T Hitec
OPTION
#293493 25T Futaba
OPTION
BAG
903305
303144-OALU SHIM 3x5x4.0MM - ORANGE (10)
303241 BALL UNIVERSAL 5.8 MM HEX (4)
306310 ANTENNA TUBE (2)
332660 COMPOSITE STEERING & SERVO BALL JOINT 5.8 MM (4+2)
336000 COMPOSITE RECEIVER CASE
336120 COMPOSITE STEERING SERVO HOLDER - SET - V2
336151 COMPOSITE BATTERY PLATE
336200 COMPOSITE STEERING SERVO ARMS - SET
336183 ALU RADIO PLATE MULTI-FLEX™ BUSHING
907258
SP 2.5x8
2CC
1CC
346113 GRAPHITE RADIO PLATE
346181 ALU RADIO PLATE TWEAK BUSHING HARDCOATED (2)
346182-OALU RADIO PLATE BUSHING FIXED - ORANGE (2)
346190 ROLL-OVER BAR
346200 ALU SERVO MOUNT - SWISS 7075 T6 (2)
348603 FUEL TANK 125CC - SET
348660 ALU FUEL TANK MOUNT (2)
389400 MICRO BODY CLIP (10)
901316 HEX SCREW SB M3x16 (10)
902306
902308
902310
902312
903305
903306
907206
907258
970045
HEX SCREW SH M3x6 (10)
HEX SCREW SH M3x8 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SH M3x12 (10)
HEX SCREW SFH M3x5 (10)
HEX SCREW SFH M3x6 (10)
SCREW PHILLIPS M2x6 (10)
SCREW PHILLIPS M2.5x8 (10)
O-RING 4.5x1.5 (10)
The fuel tank has a larger 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.
2CC FUEL TANK INSERT
1CC FUEL TANK INSERT
The larger insert decreases the
fuel tank volume by 2cc, and is
recommended for use when the
fuel filter is used.
The smaller insert decreases the
fuel tank volume by 1cc.
NOTE ORIENTATION
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.
35
7. FUEL TANK & ELECTRONICS
ALTERNATIVE 1
303144-O
ALTERNATIVE 2
For low-profile battery pack.
For standard size battery pack.
SHIM 3x5x4
5x8x3.5mm
3x5x4mm
902306
SH M3x6
5x8x3.5mm
902310
3x5x4mm
3x6mm
SH M3x10
3x6mm
3x10mm
3x10mm
970045
O 4.5x1.5
DETAIL
DETAIL
Standard size battery pack
Low-profile battery pack
1.5mm
Install the pivot balls with Professional
Multi Tool (HUDY #183011)
901316
approx. 6.0mm
Note the 90° angle difference between
the ball joints
SB M3x16
Servo grommet
(NOT INCLUDED)
Make sure that servo does not touch the bulkhead.
902308
SH M3x8
3x12mm
THREAD LOCK
902312
3x8mm
SH M3x12
HUDY ALU SERVO HORNS
#293491 23T KO Propo, Airtronics, JR, Sanwa
#293492 24T Hitec
#293493 25T Futaba
Use alum servo horns for more in-corner steering
and better steering response.
36
Servo screw
(NOT INCLUDED)
Use appropriate servo arm:
K - (23T) = KO, JR, Airtronics
H - (24T) = Futaba,
F - (25T) = Hitec
DETAIL
7. FUEL TANK & ELECTRONICS
3x12mm
When big servo and/or thick servo grommets are
used, the servo can touch the chassis if is mounted
NOTE from the bottom of the radio plate. In this case,
mount servo from the top of the radio plate.
3x12mm
902306
3x6mm
SH M3x6
3x6mm
Servo grommet
(NOT INCLUDED)
902312
SH M3x12
NOTE
ORIENTATION
INITIAL SETTING
Mount servo BELOW the radio plate
ALTERNATE MOUNTING
on top of radio plate
90°
DETAIL
902308
SH M3x8
FIXED
(INITIAL SETTING)
THREADLOCK
FLEX
3x10mm
902310
Servo arm must be perpendicular to
linkage when servo is in neutral
3x6mm
SH M3x10
3x6mm
3x8mm
3x8mm
3x10mm
903306
SFH M3x6
Attach steering linkage to servo saver
DETAIL
TIGHTEN FULLY
37
7. FUEL TANK & ELECTRONICS
902308
SH M3x8
3x8mm
907206
Antenna Tube
2x6
3x8mm
➌
3x8mm
2x6mm
➊
➌
3x8mm
DETAIL
➋
Receiver
(NOT INCLUDED)
If the receiver box has 2 different-size
openings for cable entry (narrow and
wider), cut away the tab for the appropriate
opening to allow the cables to fit properly.
Route servo and transponder leads into
box and seal with silicone sealant.
Use an appropriate receiver battery pack
Battery (NOT INCLUDED)
BATTERY PLATE
Use tape to mount the receiver
battery pack to the lower holder
(not included).
903305
SFH M3x5
38
#336151 COMPOSITE
INCLUDED
#336155 GRAPHITE
OPTION
#346157 BRASS (100g) OPTION
8. ENGINE & CLUTCH
908312
338584
338585
338586
348418
338556
348512
930150
348423
338584
338585
338586
930508
359050
908312
348541
348575
348560
338594
348533
338590
902306
348572
338732
338550
338540 or 338541
(NOT INCLUDED)
Manifold (NOT INCLUDED)
964073
964074
964075
Engine (NOT INCLUDED)
Muffler (NOT INCLUDED)
348716
348717
Screw (NOT INCLUDED)
911410
1ST XCA HARDCOATED PINION GEAR
#348417
17T (1st)
OPTION
#348418
18T (1st)
INCLUDED
#348419
19T (1st)
OPTION
2ST XCA HARDCOATED PINION GEAR
#348422
22T (2nd)
OPTION
#348423
23T (2nd)
INCLUDED
#348424
24T (2nd)
OPTION
#348425
25T (2nd)
OPTION
BAG
08
338540
338541
338550
338556
338584
338585
338586
338590
338594
338732
348418
348423
348502
348512
348533
348541
348576
#CLUTCH SHOE - RED
FLYWHEEL COLLAR 7MM - NOVAROSSI (OPTION)
FLYWHEEL COLLAR 6MM - PICCO (OPTION)
FLYWHEEL NUT - HUDY SPRING STEEL™
THRUSTBEARING COLLAR - HUDY SPRING STEEL™
SHIM 5x7x0.2 (10)
SHIM 5x7x0.3 (10)
SHIM 5x7x0.5 (10)
CLUTCH SPRING CUP - ALU 7075 T6
CLUTCH PRELOAD ADJ. NUT - HUDY SPRING STEEL™
EXHAUST MOUNTING WIRE - EXTRA-LONG
XCA ALU PINION GEAR 18T (1ST) - 7075 T6 - HARDCOATED - LARGE
XCA ALU PINION GEAR 23T (2ND) - 7075 T6 - HARDCOATED - LARGE
XCA (XRAY CENTRIFUGAL-AXIAL) CLUTCH SET - REVERSE - SMALL
XCA CLUTCHBELL FOR SMALLER PINION GEARS - HUDY STEEL
FLYWHEEL - FLAT - HARDCOATED
CLUTCH SPRING - ULTRA-STABLE
#348513
XCA ALU NICKEL-COATED CLUTCHBELL FOR
SMALLER PINION GEARS
348560
348572
348575
348716
348717
359050
CLUTCH FLYWEIGHT SET
ALU CLUTCH DISK - CONICAL - SWISS 7075 T6
CLUTCH SHOE - YELLOW
ALU ENGINE MOUNT (2)
STAINLESS STEEL ENGINE MOUNT SHIM (2)
CLUTCH BELL BALL-BEARING 5x10x4 (2)
902306
908312
911410
930150
930508
964073
964074
964075
HEX SCREW SH M3x6 (10)
HEX SCREW SOCKET HEAD CAP M3x12 (10)
HEX SCREW FLANGED SH M4x10 (10)
CARBIDE AXIAL THRUSTBEARING F5-10 5x10x4
BALL-BEARING 5x8x2.5 (2)
WASHER S 7x10x0.2 (10)
WASHER S 7x10x0.3 (10)
WASHER S 7x10x0.5 (10)
39
8. ENGINE & CLUTCH
DETAIL
964073
S 7x10x0.2
Shim (for adjusting flywheel distance)
Use the flywheel collar that comes with your engine, or
use optional XRAY collars:
964074
#338540 – XRAY flywheel collar for Ø6mm crankshafts
#338541 – XRAY flywheel collar for Ø7mm crankshafts
S 7x10x0.3
Hold the flywheel using HUDY
Flywheel Tool #182010
Tighten the clutch nut using
HUDY tool #107581
964075
S 7x10x0.5
DETAIL
The flywheel collar must stay inside the flywheel.
INCORRECT
CORRECT
CUT
If the flywheel collar is too long – if it is flush with the
flywheel or protrudes slightly – remove a small amount
of material from the end, or use an XRAY collar.
Clutch weights are machined as 1 piece, with
thin film connecting the pieces together. Cut the
connecting film to separate the 3 shoes.
DETAIL
10~11mm
Adjust with spring
preload collar
9.2 +0.1mm
Adjust with shims
behind flywheel
Flywheel
NOTE
ORIENTATION
DETAIL
INITIAL POSITION FOR
FLYWHEEL PINS
348576
#CLUTCH SHOE - RED
TECH TIP FOR RX8 CLUTCH SHOE
To ensure that the RX8 clutch shoe works properly and for a long
time, it is very important to run in the clutch shoe.
Please follow these run-in steps to help ensure proper clutch
operation:
TECH TIP FOR EXTRA BOTTOM-END POWER
➊ Install clutch according to manual.
For extra bottom-end power, thread a M3x4 set-screw (#901304) into each clutch flyweight
as shown. The set-screw will add more weight to the end of the flyweight which will cause the
flyweight to open harder, giving more bottom-end power. This is recommended for high-traction
tracks where bottom-end power is required.
IMPORTANT!
Install set-screw into free (non-pivot)
end of flyweight.
3x
After inserting the set-screw,
some excess material may come
out of the hole. REMOVE this
excess material with a knife.
➋ Check that the spring preload is not too much; for run-in process use less preload.
➌ When you start the engine, the clutch should start engage under low RPM.
If the clutch engages only under high RPM, stop the engine and loosen the spring preload
collar. Repeat until the clutch engages under low RPM.
➍ Run in the clutch shoe on the track, or on the starter box if you have only limited time.
(We recommend running it in on the track.)
➎ Run in the clutch shoe for 1 tank of fuel using a soft preload setting, and then after that
slightly tighten the spring preload. DO NOT run in the clutch shoe under high RPM.
M3x4
#901304 NOT INCLUDED
40
CUTAWAY VIEW
➏ Continue this process until the clutch shoe is properly run in; this will be indicated by a dark
and glossy surface colour on the top of the clutch shoe.
8. ENGINE & CLUTCH
(1) ADJUSTING THE CLUTCH GAP
338584
DO NOT INSTALL
this bearing when setting clutch gap.
S 5x7x0.2
➊ Install the clutchbell, outer ball-bearing (small),
A
and thrustbearing assembly on the engine
crankshaft. DO NOT install the inner ball-bearing
or internal shims.
INSTALL this bearing when setting endplay.
338585
IMPORTANT
S 5x7x0.3
Push
Degrease this bearing with standard bearing
cleaner, and then lubricate with light bearing oil.
338586
ø10mm
S 5x7x0.5
5x10x4mm
5x8x2.5mm
ø5.2mm
➋ Pull the clutchbell away from the clutch shoe and
B
ø9.8mm
359050
BB 5x10x4
Push the clutchbell onto the clutch shoe and
measure distance A as indicated.
ENDPLAY SHIMS
These shims are used to
adjust clutchbell endplay.
measure distance B as indicated.
ø5.0mm
BEARING
GREASE
Pull
BEARING WITH STEEL COVERS
GRAPHITE GREASE
908312
SCH M3x12
➌ The clutch gap is A - B;
CLUTCH GAP SHIMS
These shims are used to adjust clutch gap.
the correct gap is 0.6-0.7mm
If the clutch gap is greater than this, you can
easily calculate the thickness of shims required
to set correct gap:
Thickness of shims required (in mm) = A-B-0.7
930150
Insert
CLUTCH GAP SHIMS
here
BA 5x10
For example, using the values A=5.5mm, B=4.5mm
Shim thickness = 5.5-4.5-0.7=0.3mm
Place shims on the small collar, outside the
thrustbearing assembly.
930508
BB 5x8x2.5
To measure the clutch gap
(0.6~0.7mm) you can also use
HUDY Flywheel Tool #182010
(2) ADJUSTING THE ENDPLAY
Measure endplay with this
bearing installed
Apply shims on crankshaft to set endplay to
0.05-0.15mm
Insert ENDPLAY SHIMS here
(approximately 0.7~1.0mm)
23
NOTE ORIENTATION
➊
18
➋
To tighten the pinion gear, use the #349903
alu pinion tool.
41
8. ENGINE & CLUTCH
➋
Adjust gear mesh so there is minimal
play between the gears.
908312
SCH M3x12
TOO TIGHT gear mesh will put excessive
strain on all parts and damage the parts.
TOO LOOSE gear mesh may result in
stripped gears.
911410
SHF M4x10
NOTE
ORIENTATION
Use the shims only if PICCO ENGINE
with lower carburettor is used.
➊
THREAD LOCK
902306
SH M3x6
Attach manifold to engine
using appropriate spring(s)
THREADLOCK
(screw NOT INCLUDED)
42
9. SHOCK ABSORBERS
308331
308352-O
303241
965023
965023
308091
308081
DO NOT USE CROSSED-OUT PARTS
338061
308036
1.0
1.1
1.2
972030
1.0
1.1
1.2
308327-O
338021
308040-O
FRONT - SHORT
348185
308036
FRONT SPRINGS
348184 C=7.0
OPTION
348185 C=7.5
INCLUDED
348186 C=8.0
OPTION
348187 C=8.5
OPTION
348188 C=7.0-9.0
OPTION
348189 C=10.0
OPTION
REAR SPRINGS
348283 C=5.0
OPTION
348284 C=5.6
INCLUDED
348285 C=6.3
OPTION
BAG
303241
308036
308040-O
308081
308091
308315
308327-O
308331
308352-O
333130
BALL UNIVERSAL 5.8 MM HEX (4)
COMPOSITE NON-ADJUSTABLE PISTONS - DELRIN™ - V3
SHOCK ADJ. NUT ALU + O-RING - ORANGE (4)
SHOCK ABSORBER MEMBRANE - LOW (4)
SHOCK FOAM INSERTS - LOW (4)
COMPOSITE SHOCK BALL JOINT - LONG (4)
ALU CAP FOR XRAY SHOCK BODY - ORANGE (2)
COMPOSITE FRAME SHOCK PARTS 4-STEP - SHORT
ALU SHOCK CAP-NUT WITH HOLE - ORANGE (2)
COMPOSITE REAR UPPER CAMBER LINK BALL JOINT 5.8 MM (4)
970121
308331
308315
FRONT - SHORT
REAR - LONG
348284
303241
333130
REAR - LONG
338001-O
338021
338061
348185
348284
ALU SHOCK ABSORBER-SET - ORANGE (2)
ALU SHOCK BODY (2)
HARDENED SHOCK SHAFT (2)
XRAY SPRING-SET C=7.5 - FRONT (2)
XRAY SPRING-SET C=5.6 - REAR (2)
965023
970121
972030
E-CLIP 2.3 (10)
O-RING 12.1x1.6 (10)
SILICONE O-RING 3x2 (10)
4x
1.0
1.1
1.2
2x
965023
C 2.3
INITIAL SETTING
1.0
2x
1.1
INITIAL SETTING
1.2
4x
972030
O 3x2
SHOCK OIL
SHOCK OIL
NOTE
ORIENTATION
43
9. SHOCK ABSORBERS
4x
DETAIL
970121
O 12.1x1.6
CROSSED-OUT
SHOCK OIL
Be careful not to cross-thread
the collar on the shock body.
➊
➋
INCORRECT
Install the ball joint with Professional
Multi Tool (HUDY #183011)
DO NOT USE CROSSED-OUT PARTS
CORRECT
2x
FRONT
2x
SHORT
REAR
LONG
HINT: Pre-thread the ball joint using an M3 screw.
1~2mm
4x
SHOCK OIL
4x
WARNING! Be careful not to pre-thread too far, since the
ball joint may split or the plastic threads may strip out
4x
SHOCK FILLING
➊ Fully extend the piston rod so the piston is at the
bottom of the shock body.
CUTAWAY VIEW
➋ Hold the shock upright and slightly overfill the
shock body with shock oil.
When installing the shock cap assembly on the shock
body, some oil will leak out... this is normal.
Fully tighten the cap and clean off any excess oil.
➌ Let the oil settle and allow air bubbles to rise
to the top. Slowly move the piston up and down
until no more air bubbles appear. Add shock oil
as necessary.
After the shock is assembled, the shock rod will push
itself out of the shock body fairly quickly.
Follow the next procedure to adjust the rebound.
➍ Pull the piston rod most of the way out of the shock
body. Let the shock rest for 5 minutes to allow the
air bubbles to escape.
44
After you insert the membrane ensure that it
sits properly all around the alu cup properly.
9. SHOCK ABSORBERS
4x
RELEASE
2-3 turns
➊
➋
TIGHTEN ➌
FULLY
25%
0%
75%
50%
100%
REBOUND CHECK
It is very important to push the shock shaft into the shock body slowly otherwise air can come into the shock
body which would create bubles.
REBOUND ADJUSTMENT
AFTER THE SHOCK IS ASSEMBLED YOU HAVE TO SET THE SHOCK REBOUND.
100%
75%
50%
25%
0%
➊ Release the shock cap by 2-3 turns.
➋ Push the shock shaft fully up. For the first time the extra oil will release through the hole in the alu cap-nut.
➌ Tighten the shock cup. When tightening the shock cap, extra oil will again release through the hole in the alu cap - nut. When tightening, the shock shaft will push out from the shock body.
rebound - repeat step 2 and 3 two - three times
rebound - repeat step 2 and 3 until the shock shaft will push out 75% of its length
rebound - repeat step 2 and 3 until the shock shaft will push out 50% of its length
rebound - repeat step 2 and 3 until the shock shaft will push out 25% of its length
rebound - repeat step 2 and 3 until the shock shaft will push out 0% of its length
If the shock shaft does not rebound enough, you will have to refill the shock with shock oil, and then repeat
the bleeding and rebound adjustment procedure.
4x
NOTE ORIENTATION
(SHINY FINISH SIDE)
NOTE ORIENTATION
(SHINY FINISH SIDE)
SHORTER SPRINGS
Install the pivot balls with Professional
Multi Tool (HUDY #183011)
LONGER SPRINGS
SHOCK SPRING RETAINING COLLAR
SHOCK LENGTH ADJUSTMENT
#308031
ALU - SILVER
OPTION
#308031-O
ALU - ORANGE
OPTION
#308031-K
ALU - BLACK
OPTION
#308331
COMPOSITE
INCLUDED
It is VERY important that all shocks are equal length.
Fully extend the shock absorber and measure the end-to-end length; we recommend using digital
calipers to give an accurate measurement. If a shock absorber is shorter or longer than others, adjust
the shock length by tightening or loosening the ball joint on the shock rod.
45
10. FINAL ASSEMBLY
902306
338001-O
REAR - LONG
349400
336400
336401
902310
902306
336401
901303
336400
336400
336400
902306
Servo screw (NOT INCLUDED)
336400
349400
342580
336401
336400
903305
358950
338001-O
FRONT - SHORT
336401
902310
HUDY ALU SERVO HORNS
#293494 23T KO Propo, Airtronics, JR, Sanwa
#293495 24T Hitec
#293496 25T Futaba
#334061-O
ALU BRAKE POST ARM - SWISS 7075 T6 - ORANGE
BAG
10
46
336400
336401
338001-O
342580
349400
358950
THROTTLE LINKAGE SET
BRAKE LINKAGE SET
ALU SHOCK ABSORBER-SET - ORANGE (2)
ALU FRONT CHASSIS BRACE
BODY CLIP (10)
SILICONE TUBING 1M (2.4 x 5.5MM)
901303
902306
902310
903305
HEX SCREW SB M3x3 (10)
HEX SCREW SH M3x6 (10)
HEX SCREW SH M3x10 (10)
HEX SCREW SFH M3x5 (10)
10. FINAL ASSEMBLY
902306
SH M3x6
FRONT SHOCK
SHORT
DETAIL
INITIAL SETTING
902306
SH M3x6
REAR SHOCK
LONG
DETAIL
INITIAL SETTING
47
10. FINAL ASSEMBLY
THREAD
Do not overtighten screws;
pivots must rotate freely
901303
SB M3x3
902310
NOTE
ORIENTATION
SH M3x10
Use appropriate servo arm:
K - (23T) = KO, JR, Airtronics
H - (24T) = Futaba, Rob
F - (25T) = Hitec
Approx. 15mm
DETAIL
Insert rod through hole in brake
arm. Bend rod to proper shape.
HUDY ALU SERVO HORNS
IMPORTANT:
The composite holders and servo horn orientation
depends on the servo type and servo position which
can be mounted either from top of the radio plate
or from the bottom.
#293494 23T KO Propo, Airtronics, JR, Sanwa
#293495 24T Hitec
#293496 25T Futaba
#334061-O
ALU BRAKE POST ARM - SWISS 7075 T6 - ORANGE
902306
SH M3x6
Servo screw
(NOT INCLUDED)
48
10. FINAL ASSEMBLY
903305
SFH M3x5
FRONT CHASSIS FLEX ADJUSTMENT
Aluminum Brace
Chassis features unique and innovative front flex adjustment using
an insertable aluminum brace.
SOFT SETTING
NO BRACE: The care is easier to drive
and has more forward traction.
Cut 2 pieces of silicone tubing and install as follows: SILICONE TUBE MARKED AS
RED = FROM MUFFLER TO FUEL TANK CAP
STIFF SETTING
USING THE ALUMINUM BRACE: Car has
increased steering response and cornering speed.
SILICONE TUBE MARKED AS
BLUE = FROM FUEL TANK TO CARBURETOR
BRASS CHASSIS WEIGHTS (OPTIONAL)
903305
SFH M3x5
25g
3x5mm
25g
3x5mm
#341187
BRASS CHASSIS WEIGHT FRONT 25g
3x5mm
#341188
BRASS CHASSIS WEIGHT MIDDLE
#341189
BRASS CHASSIS WEIGHT REAR 25g
49
CARB LINKAGE ADJUSTMENT
NEUTRAL (IDLE)
Approx. 0.5mm
IDLE ADJUSTMENT SCREW
Do not allow carburettor to close to less than 0.5mm.
Turn on transmitter and receiver and set the throttle servo trim to the neutral position.
Adjust the idle adjustment screw on the carburetor to open approx. 0.5-1mm.
Adjust both collars on the carb and brake linkages accordingly. The carb linkage must have approximately
0.5mm of preload on the spring at neutral.
Approx. 0.5-1mm
DO NOT ADJUST while the engine is running.
Engine idling
FULL THROTTLE
With the engine NOT RUNNING but the receiver turned ON, apply full throttle at the transmitter.
Adjust the transmitter‘s throttle servo high-end point so that the servo horn fully opens the carburettor when the
transmitter‘s throttle control (e.g., throttle trigger) is at 95% of full throttle. The servo should not have excessive
strain when at full throttle, or throttle/carb damage will result.
If the transmitter does not have throttle high-end point adjustment, adjust the throttle linkage pivot position on the
servo horn until full throttle is obtained.
BRAKE
BRAKE ADJUSTING COLLAR
Adjust the composite collar on the brake linkage so the brakes work smoothly.
If the brakes apply too much or not enough, adjust the collar accordingly. If your transmitter has throttle servo lowend point adjustment (or brake adjustment), use that to set the appropriate amount of throttle servo horn throw.
50
SET-UP SHEET
FRONT
RACE
TRACK
ECCENTER
AERO DISK
DATE
CITY
COUNTRY
TEMPERATURE /
AIR
°F or °C
NO
YES
NAME
BEST LAP TIME
mm
BUMPY
SMOOTH
TECHNICAL
MIXED
FAST
TRACK TRACTION
LOW
MEDIUM
HIGH
MEDIUM
mm
23
24
25
28
29
30
SPUR
PINION
PULLEY
19
RIDE HEIGHT
58
59
2ND 53
54
55
ROLL CENTER
UPPER ARM
3
mm
UPPER SHOCK
POSITION
2
SPRING
NO
2 HOLES
OTHER
YES
PISTONS
2 HOLES
1.0 mm
1.1 mm
1.2 mm
NO
4
3 HOLES
3
2
1 0 -1
-2 -3
mm
mm
mm
mm
OUTER ACKERMANN
POSITION
BUMPER
WINDOW
°
DIAMETER
mm
mm
5 MIN. WEAR
mm
mm
ENGINE
HEAD CLEARANCE
MANIFOLD
REAR
FLEX SETTING
UPPER ARM SHIMS
1
3
FLEX
4
FLEX
SETTING
SERVO SAVER
4 3 2 1
FIXED FLEX
FLEX
CAMBER /degr.
LEFT
PLUG
2
FIXED
FLEX
FRONT
FUEL
MUFFLER
1 2 3
0
NO-CUT
°
SHORE /degr.
CARB. DIA /mm
MEASURE UNDER
REAR UPRIGHT
mm
°
RUBBER TIRES
ENGINE
REAR
TOE IN
CUT
RIGHT
LEFT
MANUFACTURER
°
DOWNSTOP
10
9
8
7
#107711 GAUGE
0.7 mm
mm
TIRES
°
FRONT
mm
6
5
4
TOE OUT
°
WIRE
RIGHT
REAR
#107701 SUPPORT BLOCKS
MEASURE UNDER
STEERING BLOCK
FRONT
mm
LEFT
LOWER ARM
OTHER
STANDARD
0° 30° 45° 60° 90°
mm
STANDARD
#107711 GAUGE
ANTI-ROLL BAR
BLADE
SHIM
BODY HOLDER
2
1 POSITION
%
FOAM INSERTS
1.0 mm
1.1 mm
1.2 mm
3 HOLES
3
2
1
cSt
REBOUND
%
YES
GRAPHITE
1
FRONT
OIL
HARD
3
1 2
SHOCKS
cSt
MEDIUM
BODY MOUNT
POSITION
GRAPHITE
mm
UPPER ARM
ROLL CENTER
HARD
SHIM
mm
WHEEL DIAMETER
MEDIUM
60
RATIO 2ND
RATIO 1ST
RIDE HEIGHT
SOFT
STANDARD
1ST 57
mm
AUTOMATICALLY
CALCULATED
WHEEL DIAMETER
STEERING BLOCK
GEARING
18
2mm WHEELBASE
0mm
TRACK CONDITION
17
#107713 GAUGE
#107713 GAUGE
TRACKS
22
NO
sec
FINAL POSITION
QUALIFYING POSITION
2ND
AERO DISK
YES
REAR
FRONT
mm
TRACK
LAPS
1ST
REAR
ECCENTER
BUMP
STEER SHIM
REAR POSTS
BRACE
YES
YES
NO
ROLL CENTER
REAR
CAMBER /degr.
SHIM
mm
RIGHT
NO
LEFT
RIGHT
CLUTCH / BRAKE
CLUTCH TYPE
STANDARD
CLUTCH BELL
STANDARD
CLUTCH SHOE
STANDARD
OTHER
CLUTCH SPRING
STANDARD
OTHER
CLUTCH FLY WEIGHT
3mm Set screw
OTHER
ALU
CAMBER LINK
2
LOCATION 1
OTHER
4mm Set screw
WITHOUT
CLEARANCE /mm
SPRING PRELOAD /mm
BRAKE PAD
STANDARD
OTHER
BRAKE DISC
STANDARD
OTHER
mm
FRONT BALANCE
BRASS
BODY
WING
GRAPHITE
FRONT
TRACK WIDTH
mm
BATTERIES HOLDER
NONE
BRASS
GRAPHITE
BALANCE /g
HEIGHT
REAR
COMPOSITE
ENGINE MOUNT
2 MOUNTS BLOCK
ALUMINUM
MONOBLOCK
BRASS
FRONT BRACE
COMMENTS
YES
NO
REAR
FRONT
FRONT-MID BALANCE
RX8’18 SET-UP SHEET VER. 1 ©XRAY 2018v
BRASS
GRAPHITE
NONE
REAR BALANCE
BALANCE /g
BRASS
GRAPHITE
NONE
51
RC AMERICA, 2030 Century Center Blvd #15, Irving, TX 75062, USA
PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com
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