Xray XT8 Instruction Manual

Page 1

Page 2

INTRODUCTION

The XRAY XT8 is a modern, high-competition premium luxury racing 1/8 nitro truggy that is the epitome of high-performance and fine distinctive design. Your XT8 offers highest performance, responsive handling, and traditionally exceptional XRAY quality, engineering, and design. The superb craftsmanship and attention to detail are clearly evident everywhere on the XRAY XT8.

XT8 was designed around a no compromise platform; the attention to detail creates a low maintenance, extra long life nitro truggy. The ultra-low center of gravity (CG) and optimized weight balance makes set-up, driving, and maintenance easy and quick.

The XRAY XT8 was created by blending highest-quality materials and excellent design. On high-speed flat tracks or bumpy tracks, whether driving for fun or racing to win, the XT8 delivers outstanding performance, speed, and precision handling.

We have made every effort to make these instructions as easy to understand as possible. However, if you have any difficulties, problems, or questions, please do not hesitate to contact the XRAY support team at info@teamxray.com. Also, please visit our web site at www.teamxray.com to find the latest updates, set-up information, option parts, and many other goodies. We pride ourselves on taking excellent care of our customers.

SAFETY PRECAUTIONS

WARNING: This product contains a chemical known to the state of California to cause cancer and birth defects or other reproductive harm. CAUTION: CANCER HAZARD Wash thoroughly after using. DO NOT use product while eating, drinking or using tobacco products. May cause chronic effects to gastrointestinal tract, CNS, kidneys, and blood. MAY CAUSE BIRTH DEFECTS.

When building, using and/or operating this model always wear protective glasses and gloves.

Take appropriate safety precautions prior to operating this model. You are responsible for this model‘s assembly and safe operation! Please read the instruction manual before building and operating this model and follow all safety precautions. Always keep the instruction manual at hand for quick reference, even after completing the assembly. Use only genuine and original authentic XRAY parts for maximum performance. Using

any third party parts on this model will void guaranty immediately.

Improper operation may cause personal and/or property damage. XRAY and its distributors have no control over damage resulting from shipping, improper construction, or improper usage. XRAY assumes and accepts no responsibility for personal and/or property damages resulting from the use of improper building materials, equipment and operations. By purchasing any item produced by XRAY, the buyer expressly warrants that he/she is in compliance with all applicable federal, state and local laws and regulation regarding the purchase, ownership and use of the item. The buyer expressly agrees to indemnify and hold harmless XRAY for all claims resulting directly or indirectly from the purchase, ownership or use of the product. By the act of assembling or operating this product, the user accepts all resulting liability. If the buyer is not prepared to accept this liability, then he/she should return this kit in new, unassembled, and unused condition to the place of purchase.

IMPORTANT NOTES – GENERAL

• This product is not suitable for children under 16 years of age without the direct supervision of a responsible and knowledgeable adult.

• Carefully read all manufacturers warnings and cautions for any parts used in the construction and use of your model.

• Assemble this kit only in places away from the reach of very small children.

• First-time builders and users should seek advice from people who have building experience in order to assemble the model correctly and to allow the model to reach its performance potential.

• Exercise care when using tools and sharp instruments.

• Take care when building, as some parts may have sharp edges.

• Keep small parts out of reach of small children. Children must not be allowed to put any parts in their mouth, or pull vinyl bag over their head.

• Read and follow instructions supplied with paints and/or cement, if used (not included in kit).

• Immediately after using your model, do NOT touch equipment on the model such as the motor and speed controller, because they generate high temperatures. You may seriously burn yourself seriously touching them.

• Follow the operating instructions for the radio equipment at all times.

• Do not put ﬁ ngers or any objects inside rotating and moving parts, as this may cause damage or serious injury as your ﬁ nger, hair, clothes, etc. may get caught.

• Be sure that your operating frequency is clear before turning on or running your model, and never share the same frequency with somebody else at the same time. Ensure that others are aware of the operating frequency you are using and when you are using it.

• Use a transmitter designed for ground use with RC cars. Make sure that no one else is using the same frequency as yours in your operating area. Using the same frequency at the same time, whether it is driving, ﬂ ying or sailing, can cause loss of control of the RC model, resulting in a serious accident.

• Always turn on your transmitter before you turn on the receiver in the car. Always turn off the receiver before turning your transmitter off.

• Keep the wheels of the model off the ground when checking the operation of the radio equipment.

• Disconnect the battery pack before storing your model.

• When learning to operate your model, go to an area that has no obstacles that can damage your model if your model suffers a collision.

• Remove any sand, mud, dirt, grass or water before putting your model away.

• If the model behaves strangely, immediately stop the model, check and clear the problem.

• To prevent any serious personal injury and/or damage to property, be responsible when operating all remote controlled models.

• The model car is not intended for use on public places and roads or areas where its operation can conﬂ ict wit h or disrup t pedestria n or vehicu lar trafﬁ c.

• Because the model car is controlled by radio, it is subject to radio interference from many sources that are beyond your control. Since radio interference can cause momentary loss of control, always allow a safety margin in all directions around the model in order to prevent collisions.

• Do not use your model:

- Near real cars, animals, or people that are unaware that an RC car is being driven.

- In places where children and people gather

- In residential districts and parks

- In limited indoor spaces

- In wet conditions

- In the street

- In areas where loud noises can disturb others, such as hospitals and residential areas.

- At night or anytime your line of sight to the model may be obstructed or impaired in any way.

To prevent any serious personal injury and/or damage to property, please be responsible when operating all remote controlled models.

Failure to follow these instructions will be considered as abuse and/or neglect.

CUSTOMER SUPPORT

XRAY Europe

K Výstavisku 6992 91101 Trenčín Slovakia, EUROPE Phone: +421-32-7401100 Fax: +421-32-7401109 Email: info@teamxray.com

We have made every effort to make these instructions as easy to understand as possible. However, if you have any difﬁ cult ies, pro blems, o r questi ons, ple ase do not hesitate to contact the XRAY support team at info@teamxray.com. Also, please visit our Web site at www.teamxray.com to ﬁ nd the l atest updates, set-u p infor mation, opti on part s, and many other goodies. We pride ourselves on taking excellent care of our customers.

You can join thousands of XRAY fans and enthusiasts in our online community at:

www.teamxray.com

XRAY USA

RCAmerica, 167 Turtle Creek Boulevard Suite C Dallas, Texas 75207 USA Phone: (800) 519-7221 * (214) 744-2400 Fax: (214) 744-2401 Email: xray@rcamerica.com

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 ﬁ lter is clean and oiled.

• Never run your engine without an air ﬁ lter. Your engine can be seriously damaged if dirt and debris get inside the engine.

• For proper engine break-in, please refer to the manual that came with the engine.

• Do not run near open ﬂ ames or smoke while running your model or while handling fuel.

• Some parts will be hot after operation. Do not touch the exhaust or the engine until they have cooled. These parts may reach 275°F during operation!

Page 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 ﬁ re. Please have wires repaired at your local hobby shop.

• Low battery power will result in loss of control. Loss of control can occur due to a weak battery in either the transmitter or the receiver. Weak running battery may also result in an out of control car if your car‘s receiver power is supplied by the running battery. Stop operation immediately if the car starts to slow down.

• When not using RC model, always disconnect and remove battery.

• Do not disassemble battery or cut battery cables. If the running battery short-circuits, approximately 300W of electricity can be discharged, leading to ﬁ re or burns. Never disassemble battery or cut battery cables.

• Use a recommended charger for the receiver and transmitter batteries and follow

the instructions correctly. Over-charging, incorrect charging, or using inferior chargers can cause the batteries to become dangerously hot. Recharge battery when necessary. Continual recharging may damage battery and, in the worst case, could build up heat leading to ﬁ re. If battery becomes extremely hot during recharging, please ask your local hobby shop for check and/or repair and/or replacement.

• Regularly check the charger for potential hazards such as damage to the cable, plug, casing or other defects. Ensure that any damage is rectiﬁ ed before using the charger again. Modifying the charger may cause short-circuit or overcharging leading to a serious accident. Therefore do not modify the charger.

• Always unplug charger when recharging is ﬁ nished.

• Do not recharge battery while battery is still warm. After use, battery retains heat. Wait until it cools down before charging.

• Do not allow any metal part to short circuit the receiver batteries or other electrical/ electronic device on the model.

• Immediately stop running if your RC model gets wet as may cause short circuit.

• Please dispose of batteries responsibly. Never put batteries into ﬁ re.

WARRANTY

XRAY guarantees this model kit to be free from defects in both material and workmanship within 30 days of purchase. The total monetary value under warranty will in no case exceed the cost of the original kit purchased. This warranty does not cover any components damaged by use or modiﬁ cation or as a result of wear. Part or parts missing from this kit must be reported within 30 days of purchase. No part or parts will be sent under warranty without proof of purchase. Should you ﬁ nd a defective or missing part, contact the local distributor. Service and customer support will be provided through local hobby store where you have purchased the kit, therefore make sure to purchase any XRAY products at your local hobby store. This model racing car is considered to be a high-performance racing vehicle. As such this vehicle will be used in an extreme range of conditions and situations, all which may cause premature wear or failure of any component. XRAY has no control over usage of vehicles once they leave the dealer, therefore XRAY can only offer warranty against all manufacturer‘s defects in materials, workmanship, and assembly at point of sale and before use. No warranties are expressed or implied that cover damage caused by what is considered normal use, or cover or imply how long any model cars‘ components or electronic components will last before requiring replacement.

Due to the high performance level of this model car you will need to periodically maintain and replace consumable components. Any and all warranty coverage will not cover replacement of any part or component damaged by neglect, abuse, or improper or unreasonable use. This includes but is not limited to damage from crashing, chemical and/or water damage, excessive moisture, improper or no

maintenance, or user modiﬁ cations which compromise the integrity of components. Warranty will not cover components that are considered consumable on RC vehicles. XRAY does not pay nor refund shipping on any component sent to XRAY or its distributors for warranty. XRAY reserves the right to make the ﬁ nal determination of the warranty status of any component or part.

Limitations of Liability

XRAY makes no other warranties expressed or implied. XRAY shall not be liable for any loss, injury or damages, whether direct, indirect, special, incidental, or consequential, arising from the use, misuse, or abuse of this product and/or any product or accessory required to operate this product. In no case shall XRAY‘s liability excess the monetary value of this product.

Take adequate safety precautions prior to operating this model. You are responsible for this model’s assembly and safe operation.

Disregard of the any of the above cautions may lead to accidents, personal injury, or property damage. XRAY MODEL RACING CARS assumes no responsibility for any injury, damage, or misuse of this product during assembly or operation, nor any addictions that may arise from the use of this product. All rights reserved.

QUALITY CERTIFICATE

XRAY MODEL RACING CARS uses only the highest quality materials, the best compounds for molded parts and the most sophisticated manufacturing processes of TQM (Total Quality Management). We guarantee that all parts of a newly-purchased kit are manufactured with the highest regard to quality. However, due to the many factors inherent in model racecar competition, we cannot guarantee any parts once

you start racing the car. Products which have been worn out, abused, neglected or improperly operated will not be covered under warranty. We wish you enjoyment of this high-quality and high-performance RC car and wish you best success on the track!

In line with our policy of continuous product development, the exact specifications of the kit may vary. In the unlikely event of any problems with your new kit, you should contact the model shop where you purchased it, quoting the part number. We do reserve all rights to change any specification without prior notice. All rights reserved.

R/C & BUILDING TIPS

• Make sure all fasteners are properly tightened. Check them periodically.

• Make sure that chassis screws do not protrude from the chassis.

• For the best performance, it is very important that great care is taken to ensure the free movement of all parts.

• Clean all ball-bearings so they move very easily and freely.

• Tap or pre-thread the plastic parts when threading screws.

• Self-tapping screws cut threads into the parts when being tightened. Do not use excessive force when tightening the self-tapping screws because you may strip out the thread in the plastic. We recommended you stop tightening a screw when you feel some resistance.

• Ask your local hobby shop for any advice.

Please support your local hobby shop. We at XRAY Model Racing Cars support all local hobby dealers. Therefore we ask you, if at all possible, to purchase XRAY products at your hobby dealer and give them your support like we do. If you have difﬁ culty ﬁ nding 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.

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 ﬁ re or explosion, and ruin your engine.

• Nitro fuel is highly inﬂ ammable, explosive, and poisonous. Never use fuel indoors or in places with open ﬁ res and sources of heat.

• Always keep the fuel container cap tightly shut.

• Always read the warning label on the fuel container for safety information.

• Nitro-powered model engines emit poisonous vapors and gasses. These vapors irritate eyes and can be highly dangerous to your health. We recommend wearing rubber or vinyl gloves to avoid direct contact with nitro fuel.

• Nitro fuel for RC model cars is made of the combination of the methyl alcohol,

castor or synthetic oil, nitro methane etc. The ﬂ ammability and volatility of these elements is very high, so be very careful during handling and storage of nitro fuel.

• Keep nitro fuel away from open ﬂ ame, sources of heat, direct sunlight, high temperatures, or near batteries.

• Store fuel in a cool, dry, dark, well-ventilated place, away from heating devices, open ﬂ ames, direct sunlight, or batteries. Keep nitro fuel away from children.

• Do not leave the fuel in the carburetor or fuel tank when the model is not in use. There is danger that the fuel may leak out.

• Wipe up any spilled fuel with a cloth

• Be aware of spilled or leaking fuel. Fuel leaks can cause ﬁ res or explosions.

• Do not dispose of fuel or empty fuel containers in a ﬁ re. There is danger of explosion.

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SYMBOLS USED

L=R

OIL

Part bags used Assemble left and

right sides the

same way

Assemble in the

specified order

Pay attention

here

Assemble as

many times as specified (here twice)

Apply instant

glue

Cut off shadded

portion

Cut off

remaining

material

Cut off remaining material from

all plastic parts.

Tighten screw

gently

TOOLS REQUIRED

EQUIPMENT REQUIRED

TOOLS & EQUIPMENT INCLUDED

Assemble front

and rear the same

way

Apply oil

Use special

tool

Silicone Shock Oil Silicone Diff Oil Air Filter Oil

5-cell 1200NiMh Receiver Pack

Transmitter

.21 Engine Manifold

Exhaust

Glow Plug IgniterStarter Box & Battery Pack

Steering and Throttle Servos

Battery Charger

&Transmitter Batteries

Receiver

Lexan PaintFuel

Special Tool for all turnbuckles, nuts and shock clips

Personal Transponder

Threadlock & CA Glue

#309500 Grease

HUDY TOOLS

Phillips 5.0mm

Socket 5.5 / 5.0mm

Allen 2.5 / 2.0 / 1.5mm

17mm Wheel Nut Tool

(HUDY #107570)

Side Cutters Hobby Knife Reamer

(HUDY #107600)

Cross wrench

(HUDY #107581)

Flywheel Tool

(HUDY #182010)

ScissorsNeedle Nose Pliers

➊➋➌

Apply Grease Apply Thread

Lock

Ensure smooth

non-binding

movement

Use pliers Follow tip here

Page 5

Use LONG diff

outdrive for FRONT

differential

Use SHORT diff

outdrive for REAR

differential

35 5020 DIFFERENTIAL CASE 35 5030 STEEL DIFF BEVEL & SATELLITE GEARS (2+4) 35 5043 FRONT/REAR DIFF LARGE BEVEL GEAR 43T - HUDY STEEL 35 5060 FRONT/REAR DIFF OUTDRIVE ADAPTER (2) - HUDY SPRING STEEL™ 35 5061 FRONT DIFF OUTDRIVE ADAPTER - LONG (2) - HUDY SPRING STEEL™ 35 5080 DIFF PIN (2) 35 5090 DIFF GASKET (4)

90 3312 HEX SCREW SFH M3x12 (10) 94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2) 96 4030 WASHER S 3.5x12x0.2 (10) 96 4060 WASHER S 6x18x0.2 (10) 97 1060 SILICONE O-RING 6x1.5 (10) 98 0212 PIN 2x11.6 (10)

1. FRONT & REAR DIFFERENTIAL

OIL

F=R

BAGS

STEP DETAIL

355060

940816

903312

355043

964060

355030

980212

971060

355020

940816

355090

964030

355030

964030

980212

971060

355080

➊

➋

➌

➍

➎

➏

➎➏

355061

940816

BB 8x16x5

964060

S 6x18x0.2

971060

O 6x1.5

980212

P 2x11.6

BEARING OIL

Page 6

Use these silicone oils included in the

kit for initial settings:

Front diff: 7000cSt

Rear diff: 7000cSt

VERY IMPORTANT!

Fill differentials by 50% only, so that oil is up to the middle of the pin.

After assembly the differentials should have a length of 32.15~32.30 mm measured from the ends of the installed ball-bearings. If differentials are longer, retighten the 4 screws holding the crown gears.

32.15~32.30 mm

OIL

Use LONG diff

outdrive for FRONT

differential

Use SHORT diff

outdrive for REAR

differential

Use LONG diff

outdrive for FRONT

differential

Use SHORT diff

outdrive for REAR

differential

FRONT & REAR DIFFERENTIAL

964030

S 3.5x12x0.2

903312

SFH M3x12

940816

BB 8x16x5

964060

S 6x18x0.2

971060

O 6x1.5

980212

P 2x11.6

FRONT

DIFFERENTIAL

REAR

DIFFERENTIAL

F=R

OIL

Rear diff:

Silicone oil 7000cSt Fill 50% full

Front diff:

Silicone oil 7000cSt Fill 50% full

OIL

STEP DETAIL

Tight the screws equally Finish tightening in this order

OIL

➊

➋

➌

➍

➎

➏

➎

➊

➋

➌

➍

BEARING OIL

Page 7

CENTER DIFFERENTIAL

35 5020 DIFFERENTIAL CASE 35 5030 STEEL DIFF BEVEL & SATELLITE GEARS (2+4) 35 5048 CENTER DIFF SPUR GEAR 48T - HUDY STEEL 35 5070 CENTER DIFF OUTDRIVE ADAPTER (2) - HUDY STEEL 35 5080 DIFF PIN (2) 35 5090 DIFF GASKET (4)

BAG

940816

BB 8x16x5

971060

O 6x1.5

964060

S 6x18x0.2

980212

P 2x11.6

STEP DETAIL

OIL

➊

➋

➌

➍

➎

➏

➎

➏

355070

940816

903312

355048

964060

355030

980212

971060

355020

940816

355090

964030

355030

964030

980212

971060

355080

BEARING OIL

Page 8

CENTER DIFFERENTIAL

01. 3

BAG

Use the following silicone oil included

in the kit for initial setting:

Center diff: 10000cSt

VERY IMPORTANT!

Fill differential by 50% only, so that oil is up to the middle of the pin.

After assembly the differential should have a length of 32.15~32.30 mm measured from the ends of the installed ball-bearings. If differential is longer, retighten the 4 screws holding the spur gear.

32.15~32.30 mm

OIL

➊

➋

➌

➍

➎

➏

CENTER DIFFERENTIAL

OIL

940816

BB 8x16x5

971060

O 6x1.5

964060

S 6x18x0.2

980212

P 2x11.6

964030

S 3.5x12x0.2

903312

SFH M3x12

Center diff:

Silicone oil 10000cSt Fill 50% full

Tight the screws equally

STEP DETAIL

Finish tightening in this order

OIL

➊

➋

➌

➍

➎

BEARING OIL

Page 9

2. FRONT TRANSMISSION

940816

BB 8x16X5

901504

SB 5x4

902310

SH 3x10

Cut on both front and rear bulkhead blocks

901404

SB 4x4

902312

SH 3x12

981266

P 2.5x16

35 1308 XT8 BODY POSTS 35 2000 DIFF BULKHEAD BLOCK SET FRONT 35 2098 XT8 ALU FRONT SHOCK TOWER - CNC MACHINED SWISS 7075 T6 (4MM) 35 5108 BEVEL DRIVE GEAR 10T 35 5239 CVD DRIVE SHAFT COUPLING 35 5419 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL

™

35 5608 XT8 CVD UNIV. CENTR. DRIVE SHAFT - SET - HUDY SPRING STEEL™ 35 5680 XT8 UNIVERSAL CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™

90 1404 HEX SCREW SB M4x4 (10) 90 1504 HEX SCREW SB M5x4 (10) 90 2310 HEX SCREW SH M3x10 (10) 90 2312 HEX SCREW SH M3x12 (10) 94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2) 98 1266 PIN 2.5x16 (10)

BAG

FRONT DIFF

step

352098

902312

351308

352000

FRONT DIFF

355108

940816

352000

940816

981266

355680

901504

901404

355239

355419

902310

3x12

3x10

Push joint against gear to remove gap. Tighten set screw onto gear flat spot.

DETAIL

➊

➋

➌

➍

➎

➏

➐

➑

4x4

4x5

Page 10

REAR TRANSMISSION

901504

SB 5x4

902310

SH 3x10

940816

BB 8x16X5

Cut on both front and rear bulkhead blocks

902312

SH 3x12

901404

SB 4x4

➊

➋

➌

➍

➎

➏

➐

➑

981266

P 2.5x16

BAG

step

REAR DIFF

35 1308 XT8 BODY POSTS 35 2001 DIFF BULKHEAD BLOCK SET REAR 35 3098 XT8 ALU REAR SHOCK TOWER - CNC MACHINED SWISS 7075 T6 (4MM) 35 5108 BEVEL DRIVE GEAR 10T 35 5239 CVD DRIVE SHAFT COUPLING 35 5419 CENTRAL CVD SHAFT UNIVERSAL JOINT - HUDY SPRING STEEL

™

35 5608 XT8 CVD UNIV. CENTR. DRIVE SHAFT - SET - HUDY SPRING STEEL™ 35 5680 XT8 UNIVERSAL CENTRAL CVD DRIVE SHAFT - HUDY SPRING STEEL™

353098

902312

351308

352001

REAR DIFF

355108

940816

352001

940816

981266

355680

901504

901404

355239

355419

902310

3x12

3x10

Push joint against gear to remove gap. Tighten set screw onto gear flat spot.

DETAIL

4x4

4x5

Page 11

TECH TIP

962080

S 8x0.1

962081

S 8x0.2

962080

S 8x0.1

962081

S 8x0.2

TIP

Tighten screw until pivot ball is tight against block.

Lift ball joint until it snaps into place over pivot ball. Ball joint should move freely.

The ﬁ nished joint. Loosen and remove screw.

FOLLOW THIS HANDY TIP TO INSTALL PIVOT BALLS INTO COMPOSITE BALL JOINTS.

Place the pivot ball on the ball joint and use a screw to tighten it to an engine mount or some other part.

In the event that the composite diff bulkhead allows too much diff side play, this may create non-optimal gear mesh between the diff spur gear and the pinion drive gear. This is easily resolved by inserting 1 or 2 of the included thin shims behind a diff outdrive ball-bearing, depending on how much play there is.

FRONT & REAR DIFF GEAR MESH ADJUSTMENT

THE LOCATION OF THE SHIM(S) DEPENDS ON WHETHER YOU ARE TRYING TO CLOSE OR OPEN THE GAP:

To close a wide gap: add 1 or 2 shims against diff spur gear

TO CLOSE A WIDE GAP

TO OPEN A NARROW GAP

To open a narrow gap: add 1 or 2 shims on the other side of the diff, away from spur gear

#962080 WASHER S 8 x 0.1 mm (10) #962081 WASHER S 8 x 0.2 mm (10)

TIP

insert shim(s) here

Page 12

909395

SS 3.5x45

909372

SS 3.5x22

901312

SB M3x12

901303

SB M3x3

902318

SH M3x18

903308

SFH M3x8

901305

SB M3x5

901408

SB M4x8

L=R

1.8 mm

3. REAR SUSPENSION

35 2001 DIFF BULKHEAD BLOCK SET REAR 35 2309 COMPOSITE LOWER SUSP. HOLDERS SET 35 2380 CASTER CLIPS (2) 35 2450 ANTI ROLL BAR BALL JOINT 5.8 (4) 35 2460 PIVOT BALL 5.8 (10) 35 2470 BALL JOINT 5.8 (8) 35 3118 XT8 REAR LOWER SUSPENSION ARM 35 3428 REAR ANTI-ROLL BAR 2.8MM 35 7211 LOWER INNER PIVOT PIN WITH GROOVE F/R (2)

90 1303 HEX SCREW SB M3x3 (10) 90 1305 HEX SCREW SB M3x5 (10) 90 1312 HEX SCREW SB M3x12 (10) 90 1408 HEX SCREW SB M4x8 (10) 90 2318 HEX SCREW SH M3x18 (10) 90 3308 HEX SCREW SFH M3x8 (10)) 90 9372 SCREW PHILLIPS SS 3.5x22 (10) 90 9395 SCREW PHILLIPS SS 3.5x45 (10) 96 5032 E-CLIP 3.2 (10)

L=R

BAG

Loosen the 3x5 setscrew if anti-roll

bar does not turn freely

3x12

3x3

3x5

3x18

3x8

3.5x45

4x8 Downstop screw

3.5x22

Tighten screws

equally

1.5mm

901305

965032

909395

352309

903308

352001

353428

901303

352450

352470

901312

352460

352470

909372

965032

902318

357211

352380

901408

352309

DOWNSTOP SETTING

FRONT VIEW

REAR VIEW

6mm

353118

Follow the TECH TIP on page 11 to install the pivot balls

2mm

DETAIL

Page 13

980317

P 3x17

940816

BB 8x16x5

901504

SB M5x4

➊

➋

➌

➍

➎

901404

SB M4x4

980264

P 2.5x14

4. REAR SUSPENSION

Marked “R“

35 2638 XT8 ADJ. TURNBUCKLE M5 L/R 91 MM - HUDY SPRING STEEL (2) 35 3130 REAR UPPER INNER CAMBER LINK BALL JOINT (2) 35 3151 REAR UPPER OUTER CAMBER LINK BALL JOINT - RELIEF (2) 35 3160 MOUNTING BALL 6.8 (4) 35 3170 PIVOT BALL 6.8 (4) 35 3350 REAR HUB CARRIER RIGHT 35 3360 REAR HUB CARRIER LEFT 35 3520 REAR WING POSTS 35 3530 COMPOSITE ADJ. SHIM FOR REAR WING PLATE (2) 35 3559 COMPOSITE REAR WING MOUNT BRACE (2) 35 5208 XT8 CVD UNIVERSAL DRIVE SHAFT F/R - SET - HUDY SPRING STEEL™ 35 5219 CVD DRIVE AXLE - HUDY SPRING STEEL™ 35 5239 CVD DRIVE SHAFT COUPLING 35 5250 ALU WHEEL AXLE - HARD COATED (2)

35 5280 XT8 UNIVERSAL CVD DRIVE SHAFT - HUDY SPRING STEEL™ 35 7330 REAR LOWER OUTER PIVOT PIN (2)

90 1404 HEX SCREW SB M4x4 (10) 90 1504 HEX SCREW SB M5x4 (10) 90 2305 HEX SCREW SH M3x5 (10) 90 2316 HEX SCREW SH M3x16 (10) 90 2322 HEX SCREW SH M3x22 (10) 90 5314 SCREW PHILLIPS 3.0x14 (10) 94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2) 96 0030 NUT M3 (10) 96 1032 WASHER S 3.2 (10) 98 0264 PIN 2.5x14 (10) 98 0317 PIN 3x17 (10)

BAG

Marked “L“

902322

357330

905314

353520

353559

902322

960030

353160

353530

353520

902316

960030

353130

352638

353151

902305

961032

902322

961032

902305

353350

980317

355250

901504

940816

960030

980264

355219

355280

355239

901404

940816

L=R

➊

➋

➌

➍

➎

353170

353360

➎

STEP Tighten the screw fully when the pin is installed

Page 14

REAR SUSPENSION

902305

SH M3x5

902322

SH M3x22

902316

SH M3x16

960030

N M3

905314

SP 3x14

960030

N M3

902322

SH M3x22

961032

S 3.2

Shims for wheel base adjustment

3x14

3x22

L=R

Left thread Right thread

3x16

3x22

INITIAL POSITIONS

58 mm

DETAIL

Use tools to tighten as shown

INITIAL POSITIONS

Follow the TECH TIP on page 11 to install the pivot balls

Note location of notch

3x14

Please ensure that the rear upright moves freely. In case the rear upright is not moving freely use use sandpaper to thin both wheelbase adjustment shims until the rear upright moves freely.

➊

➋➌

➌

DEAIL

INITIAL POSITIONS

Page 15

909395

SS 3.5x45

909372

SS 3.5x22

901408

SB M4x8

901312

SB M3x12

901303

SB M3x3

902318

SH M3x18

903308

SFH M3x8

901305

SB M3x5

5. FRONT SUSPENSION

35 2000 DIFF BULKHEAD BLOCK SET FRONT 35 2118 XT8 FRONT LOWER SUSPENSION ARM RIGHT 35 2128 XT8 FRONT LOWER SUSPENSION ARM LEFT 35 2309 COMPOSITE LOWER SUSP. HOLDERS SET 35 2318 STEEL SUSP. HOLDER - FRONT - LASER CUT 35 2380 CASTER CLIPS (2) 35 2424 FRONT ANTI-ROLL BAR 2.4MM 35 2450 ANTI ROLL BAR BALL JOINT 5.8 (4) 35 2460 PIVOT BALL 5.8 (10) 35 2470 BALL JOINT 5.8 (8)

35 7211 LOWER INNER PIVOT PIN WITH GROOVE F/R (2) 90 1303 HEX SCREW SB M3x3 (10) 90 1305 HEX SCREW SB M3x5 (10) 90 1312 HEX SCREW SB M3x12 (10) 90 1408 HEX SCREW SB M4x8 (10) 90 2318 HEX SCREW SH M3x18 (10) 90 3308 HEX SCREW SFH M3x8 (10)) 90 9372 SCREW PHILLIPS SS 3.5x22 (10) 90 9395 SCREW PHILLIPS SS 3.5x45 (10) 96 5032 E-CLIP 3.2 (10)

3.5x45

3.5x22

3x3

3x5

3x18

3x8

L=R

BAG

Tighten screws equally

REAR VIEW

Loosen the 3x5 setscrew if anti-roll bar does not turn freely

DOWNSTOP SETTING

L=R

909372

352309

965032

901408

352380

902318

352118

357211

352309

909395

352470

965032

901312

352460

901303

352450

352000

903308

901305

352424

DETAIL

1.5mm

FRONT VIEW

DETAIL

3x12

6mm

L=R

2mm

Follow the TECH TIP on page 11 to install the pivot balls

352128

352318

2.6mm

4x8 Downstop screw

Page 16

902412

SH M4x12

902416

SH M4x16

901504

SB M5x4

940816

BB 8x16x5

980317

P 3x17

901404

SB M4x4

980264

P 2.5x14

6. FRONT SUSPENSION

Marked “R“

35 2138 XT8 FRONT UPPER ARM RIGHT 35 2148 XT8 FRONT UPPER ARM LEFT 35 2150 FRONT UPPER ARM BALL JOINT (2) 35 2179 COMPOSITE BUSHING & BALL MOUNT SET (2+2) 35 2210 C-HUB RIGHT 35 2220 C-HUB LEFT 35 2250 STEERING BLOCK RIGHT - V2 35 2260 STEERING BLOCK LEFT - V2 35 2297 STEEL STEERING BUSHING - LONG (2+2) 35 2315 ECCENTRIC BUSHING (2) 35 2380 CASTER CLIPS (2) 35 2330 COMPOSITE FRONT UPPER SUSP. HOLDER - REAR 35 2620 ADJ. TURNBUCKLE M5 L/R 35 MM - SPRING STEEL (2) 35 3170 PIVOT BALL 6.8 (4) 35 5208 XT8 CVD UNIVERSAL DRIVE SHAFT F/R - SET - HUDY SPRING STEEL™ 35 5219 CVD DRIVE AXLE - HUDY SPRING STEEL™ 35 5239 CVD DRIVE SHAFT COUPLING

35 5280 XT8 UNIVERSAL CVD DRIVE SHAFT - HUDY SPRING STEEL™ 35 5250 ALU WHEEL AXLE - HARD COATED (2) 35 7220 FRONT UPPER PIVOT PIN (2) 35 7230 FRONT LOWER OUTER PIVOT PIN (2)

90 1404 HEX SCREW SB M4x4 (10) 90 1504 HEX SCREW SB M5x4 (10) 90 2305 HEX SCREW SH M3x5 (10) 90 2322 HEX SCREW SH M3x22 (10) 90 2412 HEX SCREW SH M4x12 (10) 90 2416 HEX SCREW SH M4x16 (10) 90 3312 HEX SCREW SFH M3x12 (10) 94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2) 96 0030 NUT M3 (10) 98 0264 PIN 2.5x14 (10) 98 0317 PIN 3x17 (10)

4x12

4x16

5x4

BAG

LONG

SHORT

Marked “L“

903312

352315

352330

352380

352138

352620

352150

353170

357220

352179

902305

357230

352179

902412

960030

352210

902416

940816

355239

901404

355280

980264

355219

352297

940816

352297

352250

➊

➋

➌

980317

355250

901504

902322

352148

352220

352260

L=R

➎

STEP Tighten the screw fully when the pin is installed

➊➎

➋

➌

➍

➏

➐

➑

➒

➓

2.5x14

3x17

4x4

Page 17

902305

SH M3x5

902322

SH M3x22

903312

SFH M3x12

960030

N M3

➊

➋

➌

➍

➎

STEP DETAIL

FRONT SUSPENSION

L=R

3 mm

2 mm

1 mm

3x22

3x12

L=R

FRONT VIEW

REAR VIEW

L=R

DOT IN FRONT

Press pivot ball into arm until it snaps into place

Remove 3x5 screw holding composite bushing in arm. Push out the pivot pin from the rear to remove the composite bushing.

DISASSEMBLY

Notch goes to outside

INITIAL POSITION

ASSEMBLY

13 mm

DOT IN FRONT

➎

2.5 mm

1.5 mm

Install inserts as shown

Install inserts

as shown

Follow the TECH TIP on page 11 to install the pivot balls

DETAIL

Page 18

903412

SFH M4x12

FRONT & REAR ASSEMBLY

35 1120 XT8 ALU CHASSIS - HARDCOATED SWISS 7075 T6 (3MM) 35 1200 FRONT & REAR BUMPER 35 3089 COMPOSITE REAR BRACE - V2

90 2312 HEX SCREW SH M3x12 (10) 90 3312 HEX SCREW SFH M3x12 (10) 90 3412 HEX SCREW SFH M4x12 (10) 96 0030 NUT M3 (10)

BAG

903412

903312

960030

902312

960030

351200

351120

353089

Page 19

903312

SFH M3x12

902312

SH M3x12

903412

SFH M4x12

960030

N M3

FRONT & REAR ASSEMBLY

SFH M3x12

SH M3x12

DETAIL

Page 20

970121

O 12x1.6

7. STEERING

30 9319 UNIVERSAL SET OF PLASTIC SHIMS 35 1345 ALU UPPER PLATE 7075 T6 (4MM) 35 2089 COMPOSITE FRONT BRACE - V2 35 2500 SERVO SAVER COMPLETE SET - V2 35 2510 COMPOSITE SERVO SAVER 35 2570 ALU STEERING PLATE 7075 T6 (3MM) 35 2575 STEERING PLATE BUSHING (2) 35 2618 XT8 ADJ. TURNBUCKLE M4 L/R 86 MM - HUDY SPRING STEEL (2) 35 2651 BALL STUD 5.8MM WITH BACKSTOP - V2 (2) 35 2662 STEERING BALL JOINT 5.8MM FOR M4 (2) 35 2663 RELIEF STEERING BALL JOINT 5.8MM FOR M4 (2)

90 3308 HEX SCREW SFH M3x8 (10) 90 3310 HEX SCREW SFH M3x10 (10) 90 3312 HEX SCREW SFH M3x12 (10) 90 3314 HEX SCREW SFH M3x14 (10) 90 3410 HEX SCREW SFH M4x10 (10) 94 0610 HIGH-SPEED BALL-BEARING 6x10x3 BLUE COVERED (2) 96 0030 NUT M3 (10) 97 1120 SILICONE O-RING 12x1.6 (10

BAG

1 mm

INITIAL PRELOAD SETTING

903310

903308

351345

960030

352089

903312

940610

960030

903310

960030

352570

309319

352651

352662

352618

352651

352663

960030

352651

352663

960030

352618

352510

352500

971120

903410

352500

352575

940610

903308

903314

352500

352662

#352500

FACTORY ASSEMBLED

#352500

FACTORY ASSEMBLED

Page 21

903310

SFH M3x10

940610

BB 6x10x3

903308

SFH M3x8

903314

SFH M3x14

903410

SFH M4x10

903310

SFH M3x10

960030

N M3

903312

SFH M3x12

960030

N M3

STEERING

L=R

3x10

3x8

3x12

L=R

4x10

FASTEN TIGHTLY

65.5 mm

Tighten all steering

fasteners securely

3x14

INITIAL POSITION

3x10

2mm2mm

composite shimcomposite shim

Relief ball joint

Page 22

902316

SH M3x16

8. CENTER DIFF & BRAKE

Temporarily insert brake disk between pads to set correct gap

Fibre pad (Ferodo)

BAG

Steel pad

F=R

35 4011 CENTER DIFF MOUNTING PLATE SET - HIGHER 35 4040 BRAKE CAM POST & ROD (2+2) 35 4055 ALU CENTER DIFF MOUNTING PLATE 7075 T6 (3MM) 35 4080 COMPOSITE BUSHING FOR DIFF MOUNTING PLATE (2) 35 4110 VENTILATED BRAKE DISK - LASER CUT - PRECISION-GROUND 35 4120 STEEL BRAKE PAD - LASER CUT (4) 35 4130 BRAKE PAD FERODO (4)

90 1304 HEX SCREW SB M3x4 (10) 90 2316 HEX SCREW SH M3x16 (10) 90 2330 HEX SCREW SH M3x30 (10) 90 3308 HEX SCREW SFH M3x8 (10) 90 3412 HEX SCREW SFH M4x12 (10)

Fibre pads together

0.5~0.8 mm

903308

902316

354120

CENTER DIFF

903412

354011

354110

902316

354130

354011

354040

354080

354055

903308

901304

354040

902330

Roughen steel plates with

sandpaper before gluing

fibre pads

HOLE ROUND

HOLE OVAL

NOTE

ORIENTATION

NOTE

ORIENTATION

Page 23

901304

SB M3x4

903308

SFH M3x8

902330

SH M3x30

903308

SFH M3x8

903412

SFH M4x12

CENTER DIFF & BRAKE

NOTE ORIENTATION

Before inserting 3x30 long screws, loosen the four flat-head screw in the upper graphite plate by 1/2 turn. Tighten all screws after assembly.

NOTE ORIENTATION

2 mm

0 mm

Insert brake disk between brake pads

DETAIL

Page 24

903310

SFH M3x10

960030

N M3

35 1150 CHASSIS SIDE GUARDS L+R 35 8513 CLUTCH BELL 13T 35 8531 FLYWHEEL - HARD COATED 35 8540 FLYWHEEL COLLAR (OPTION) 35 8550 FLYWHEEL NUT - HUDY SPRING STEEL™ 35 8561 ALU CLUTCH SHOES - LIGHT 1.71g - CNC MACHINED (3) 35 8584 CLUTCH SPRINGS - MEDIUM (3) 35 8601 FUEL TANK 150CC - SET 35 8680 FUEL TANK MOUNTING POST (2) 35 8685 FUEL TANK MOUNTING GROMMET (4) 35 8710 ALU ENGINE MOUNT - CNC MACHINED 35 8722 EXHAUST WIRE MOUNT SET - LONG 35 8930 FUEL FILTER MOUNT & TUBING HOLDERS

35 9050 CLUTCH BELL BALL-BEARING MR105ZZ 5x10x4 (2) 90 1405 HEX SCREW SB M4x5 (10) 90 2308 HEX SCREW SH M3x8 (10) 90 2316 HEX SCREW SH M3x16 (10) 90 3310 HEX SCREW SFH M3x10 (10) 90 3410 HEX SCREW SFH M4x10 (10) 90 8312 HEX SCREW (CAP HEAD) 3x12 (10) 96 0030 NUT M3 (10) 96 1025 WASHER S 2.5 (10) 96 2050 WASHER S 5x10x1.0 (10) 96 4073 WASHER S 7x10x0.2 (10) 96 4074 WASHER S 7x10x0.3 (10) 96 4075 WASHER S 7x10x0.5 (10)

BAG

L=R

Follow the order of steps

9. FUEL TANK & ENGINE

902316

358601

358930

358685

358680

903310

902308

902316

908312

Manifold (not included)

Pipe (not included)

Screw (not included)

358710

Engine (not included)

964073 964074 964075

358540 (OPTION)

358550

358584

359050

358513

358531

961025

358561

960030

903310

351150

902308

358722

960030

902308

962050

901405

358722

911410

903410

903310

960030

351150

➊

➋

➊

➋

Page 25

902316

SH M3x16

902308

SH M3x8

911410

SHF M4x10

902308

SH M3x8

908312

SCH M3x12

359050

BB 5x10x4

961025

S 2.5

962050

S 5x10x1

901405

SB M4x5

902308

SH M3x8

903410

SFH M4x10

960030

N M3

964073

S 7x10x0.2

964074

S 7x10x0.3

964075

S 7x10x0.5

903310

SFH M3x10

7x10x0.2 / 0.3 / 0.5

3x12

3x8

5x10

2.5

3x10

4x10

Adjust engine position to achieve proper gear mesh

4x5

4x10

3x8

Use appropriate shims to achieve proper clutchbell endplay

Note the orientation of the clutch shoes. The short side of spring must be in the groove of the flywheel nut.

CUT AWAY FOR MUFFLER OUTLET

Make 3mm holes as appropriate to mount muffer support/protector.

11~11.2 mm

3x16

FUEL TANK & ENGINE

EXTREMELY IMPORTANT !!! It is very important to ensure that your XT8 has properly adjusted gear mesh. Adjust the gear mesh so there is slightly larger play between the spur gear and clutch bell teeth.

DETAIL

3x8

Tighten the clutch nut using HUDY tool #107581

Hold the flywheel using HUDY Flywheel Tool #182010

Page 26

902312

SH M3x12

10. RADIO CASE

BAG

Short

Long

30 6310 ANTENNA TUBE (2) 30 9400 BODY CLIP (8) 35 2460 PIVOT BALL 5.8 (10) 35 2648 XT8 ADJ. TURNBUCKLE M3 L/R 62 MM - HUDY SPRING STEEL (2) 35 2650 BALL STUD 5.8MM (4) 35 2670 SERVO BALL JOINT 5.8MM (4) 35 6000 RADIO CASE SET 35 6116 ALU RADIO PLATE 7075 T6 (3MM) - V2 35 6120 STEERING SERVO MOUNT - SET 35 6200 BRAKE/THROTTLE ARMS & STEERING SERVO ARMS - SET 35 6600 TRANSPONDER MOUNT

38 9135 CONNECTING CABLE RECEIVER/BATT. PACK (OPTION)

90 2305 HEX SCREW SH M3x5 (10) 90 2308 HEX SCREW SH M3x8 (10) 90 2310 HEX SCREW SH M3x10 (10) 90 2312 HEX SCREW SH M3x12 (10) 90 3308 HEX SCREW SFH M3x8 (10) 90 3310 HEX SCREW SFH M3x10 (10) 90 7206 SCREW PHILLIPS 2x6 (10) 96 0030 NUT M3 (10)

Left threadRight thread

Ball joints must be 90° to each other

Use appropriate servo arm:

K - KO Propo, JR, Sanwa, Multiplex H - Hitec F - Futaba

356000

903308

907206

356000

Receiver battery (not included)

356000

903308

306310

309400

Servo Grommet (not included)

902310

Throttle Servo (not included)

903308

902308

902305

356600

356116

356120

903308

356120

903308

Steering Servo (not included)

Servo Grommet (not included)

960030

352650

Servo Screw

(not included)

352460

356200

352670

903310

309400

902310

352670

902312

352648

Follow the TECH TIP on page 11 to install the pivot balls

Receiver (not included)

50mm

Page 27

903308

SFH M3x8

907206

SP M2x6

903308

SFH M3x8

903310

SFH M3x10

960030

N M3

902308

SH M3x8

902310

SH M3x10

903308

SFH M3x8

RADIO CASE

2x6

3x8

Route servo leads as shown

Route receiver wire through mounting hole in top plate and through antenna tube

3x8

3x10

SH M3x10

SFH M3x8

SH M3x10

SH M3x8

SFH

M3x8

KO PROPO

SANWA

FUTABA

Use appropriate servo stands

Route steering servo lead behind lead clamp

Servo screw

NOTE ORIENTATION

Route servo leads through this gap. Seal gap with silicone after leads are all routed and plugged into receiver.

Note orientation of servo arm when servo is at neutral

Servo stands

Use foam to cushion the inside of the radio case so the receiver and battery cannot vibrate or move.

NOTE ORIENTATION

Page 28

968070

G 7

971035

O 3.5x2

960025

N M2.5

358040

S 2.5x6x0.5

BAGS

11.1

35 2460 PIVOT BALL 5.8 (10) 35 8011 COMPOSITE SHOCK ADJUSTABLE CLIPS 35 8012 COMPOSITE SET OF SHIMS FOR SHOCKS 0.7 & 1.3 MM 35 8013 COMPOSITE FRAME SHOCK PARTS - WIDE 35 8036 SHOCK PISTON SET - WIDE (2) 35 8040 HARDENED SHOCK SHIMS (4) 35 8051 ALU SHOCK CAP NUT - WIDE (2) 35 8060 RUBBER SHORT SHOCK BOOT (4) 35 8061 FELT SHIM FOR RUBBER SHORT SHOCK BOOT (4) 35 8081 SHOCK RUBBER MEMBRANE - WIDE (4)

35 8096 XRAY SPRING-SET HARD DARK-BLUE (2+2) 35 8128 XT8 ALU FRONT SHOCK BODY - HARD COATED (2) 35 8168 XT8 FRONT SHOCK SHAFT (2) 35 8228 XT8 ALU REAR SHOCK BODY - HARD COATED (2) 38 8268 XT8 REAR SHOCK SHAFT (2)

96 0025 NUT M2.5 (10) 96 8070 G-CLIP 7 (10) 97 1035 SILICONE O-RING 3.5x2 (10)

11. SHOCK ABSORBERS

FRONT SHOCKS

PISTONS DETAIL

1.5

1.4

1.3

1.5

1.4

1.3

Insert G-clip

in groove.

step

DO NOT OVERTIGHTEN

FRONT SHOCK

11.1

BAG

step

BAG

Use 1.4mm pistons, straight (no dot on the piston)

CORRECT INCORRECT

TIGHTEN GENTLY

The self-locking nut is gently tightened. The piston remains undistorted and fits inside the shock body perfectly, ensuring smooth movement of the piston.

The self-locking nut is overtightened, causing distortion of the piston. This will negatively affect the free movement of the piston in the shock body.

Grip the shock rod at top of exposed threads with side cutting pliers. Be careful not to damage the shock rod.

REAR

SHOCK

DO NOT OVERTIGHTEN

Use 1.5mm pistons, straight (no dot on the piston)

CORRECT INCORRECT

TIGHTEN GENTLY

The self-locking nut is gently tightened. The piston remains undistorted and fits inside the shock body perfectly, ensuring smooth movement of the piston.

The self-locking nut is overtightened, causing distortion of the piston. This will negatively affect the free movement of the piston in the shock body.

Grip the shock rod at top of exposed threads with side cutting pliers. Be careful not to damage the shock rod.

There are two different thickness shims, use them as shown. Use the same procedure when building both front and rear shocks.

350 shock oil: Use in standard and cold weather. 500 shock oil: Use in hot weather.

TIP

G-clip

Thick Shim 1.3mm

O-ring

Thin Shim 0.7mm

O-ring

REAR SHOCKS

SHIMS DETAIL

THICK

1.3mm

THICK

0.7mm

STRAIGHT HOLES

CONICAL HOLES DOT ON PISTON

358013

358096

358011

352460

358013

358060

358061

968070

358012

971035

358128

358228

358268

358168

358040

358036

960025

358081

358013

352460

358051

#358012

0.7mm

1.3mm

Page 29

➊

➋

➌

➍

➎

➏

➐

➑

➊

➋

➌

➍

➎

➊

➋

➌

➍

➎

SHORT shock rod

OIL

Shock Silicone

Oil 600cSt

Fill until shock oil nearly overflows

Gently move the piston up and down to get rid of air bubbles

Pull down the piston

1. Install the pivot ball into the composite pivot mount.

2. Extend the shock rod so the piston is near the bottom of the shock body.

3. Hold shock upright and slightly overfill the shock body with shock oil.

4. 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.

5. Pull the piston most of the way out of the shock body.

6. Insert the top composite pivot mount in the alu collar. Ensure the notch in the collar fits over the tab on the top pivot mount.

7. Insert the rubber membrane in the alu collar. The membrane must be installed properly.

8. Place the top assembly on the shock body, then thread it fully onto the shock body. Excess oil should spill out.

Shock bleeding: Check the shock for proper operation. The shock rod must move in and out freely with only “hydraulic” damping.

The shock rod should not extend out by itself when pushed in and released. If this happens, extend the shock rod, loosen the top collar, and then slightly push the shock rod into the shock body. Excess oil should escape out the top of the shock. Retighten the top collar and retest. Repeat bleeding as required.

The shock rod should not be drawn into the shock body when pulled out and released. If this happens, remove the top collar assembly (including bladder). Fill the shock body with more shock oil and reassemble. Retest. Repeat bleeding as required.

SHOCK ABSORBERS

Insert 10mm clips or insert clips according to track conditions

Front spring (short)

Use tool for easy clip installation and removal

FRONT SHOCKS (short)

CUT AWAY VIEW

REAR SHOCKS (long)

IMPORTANT! Both front shocks must be the same overall length.

IMPORTANT! Both rear shocks must be the same overall length.

Grip the shock rod at top of exposed threads with side cutting pliers. Be careful not to damage the shock rod.

LONG shock rod

OIL

FRONT SHOCKS

REAR SHOCKS

Rear spring (long)

FRONT SHOCKS

REAR SHOCKS

FRONT & REAR SHOCKS

➊

➋

➌

➍

➊

➋

➌

➍

Insert 10mm clips or insert clips according to track conditions

Page 30

902320

SH M3x20

902322

SH M3x22

960030

N M3

12. FINAL ASSEMBLY

BAG

35 1310 FOAM WASHER FOR BODY POSTS (4) 35 3510 REAR WING 35 5260 WHEEL NUT - HARD COATED (2) 35 6200 BRAKE/THROTTLE ARMS & SERVO ARMS - SET 35 6400 BRAKE/THROTTLE SYSTEM - SET 35 6510 CLOSED BALL JOINT 3.9 (4) 35 8045 SHOCK PIVOT BALL WITH HEX (2) 35 8108 XT8 FRONT SHOCK ABSORBERS COMPLETE SET (2) 35 8208 XT8 REAR SHOCK ABSORBERS COMPLETE SET (2) 35 8810 AIR FILTER ELBOW 35 8820 AIR FILTER BODY & CAP 35 8840 AIR FILTER FOAM & OIL 35 8901 COMPOSITE FUEL FILTER SET 35 8930 FUEL FILTER MOUNT & TUBING HOLDERS

35 8950 SILICONE TUBING 1M (2.4 x 5.5MM) 35 9400 BODY CLIP (10) 35 9720 XRAY BODY FOR 1/8 TRUGGY 35 9830 TRUGGY WHEELS STARBURST AERODISK - WHITE (4) 35 9930 XRAY TRUGGY PIN TIRE - THRAX + FOAM INSERTS (2) 90 1303 HEX SCREW SB M3x3 (10) 90 2308 HEX SCREW SH M3x8 (10) 90 2310 HEX SCREW SH M3x10 (10) 90 2320 HEX SCREW SH M3x20 (10) 90 2322 HEX SCREW SH M3x22 (10) 90 3312 HEX SCREW SFH M3x12 (10) 90 3314 HEX SCREW SFH M3x14 (10) 96 0030 NUT M3 (10) 96 1022 WASHER S 2.2 (10)

3x20

3x22

L=R

FRONT SHOCKS (SHORT)

INITIAL POSITIONS

901303

356400

356510

903314

902310

356200

961022

358950

356400

901303

961022

901303

358950

356400

903312

353510

358901

358930

358840

358810

960030

358820

358840

358820

902308

902320

902322

358045

359400

960030

359400

359830

359930

355260

359830

355260

902322

358045

358208

960030

358108

902320

INITIAL POSITIONS

359930

351310

Page 31

903312

SFH M3x12

902320

SH M3x20

902322

SH M3x22

960030

N M3

901303

SB M3x3

902310

SH M3x10

903314

SFH M3x14

961022

S 2.2

960030

N M3

FINAL ASSEMBLY

3x20

3x22

L=R

3x10

Brake rod

Throttle rod

REAR SHOCKS (LONG)

INITIAL POSITIONS

Thread brake rods into plastic pivots until flush with outer end

INITIAL POSITIONS

3x14

SILICONE

TUBING

10mm

Brake rod

Tighten screw unitil snug. Pivots should move freely.

CUTAWAY VIEW

Use servo horn depending on your servo

K - KO Propo F - Futaba H - Hitec

Servo screw

(not included)

DETAIL

Page 32

Always use air filter oil

OIL

Use the fuel tubing holders where neccessary

902308

SH M3x8

FINAL ASSEMBLY

Cut the silicone tube depending on engine and muffler. Use the plastic

clips to hold the tubes together.

The fuel filter has a small hole that fits into notch on the composite holder to prevent the filter from turning freely

Use the fuel tubing holders

where neccessary.

Page 33

ADJUST INDIVIDUAL LINKAGES SEPARATELY TO AVOID

INTERFERING WITH THE OPERATION OF THE OTHERS

Idling Adjustment Screw. Use to adjust the idle setting of the carburetor. Do not allow carburetor to close to less than 1mm.

Brake adjusting knobs: Upper linkage - rear brake Lower linkage - front brake

~1mm

cca 1mm

* Turn on the transmitter and receiver and set the engine control servo trim to the neutral position. * Adjust the idle adjustment screw on the carburetor to open approx. 1mm. * Adjust both the throttle linkage and brake linkages accordingly. * DO NOT adjust the linkage with the engine running.

NEUTRAL (IDLE)

FULL THROTTLE

* Adjust the servo-horn mounting position for the carburetor to open fully. * Change the pivot mounting position on the servo horn in case the carburetor is not opening fully or if it is opening excessively. Or if available on the transmitter, adjust the throttle high end point.

BRAKE

* Adjust the adjustable collars so the brakes work smoothly. * If the brakes apply too much or not enough, adjust the adjustable collars accordingly. Or if available on the transmitter, adjust the brake endpoint. * To tighten brakes, turn collar to thread brake rod INTO pivot. * To loosen brakes, turn collar to thread brake rod OUT of pivot.

Engine idling

0.5mm

THROTTLE LINKAGE ADJUSTMEN

Page 34

PROBLEM CAUSE SOLUTION

Engine does not

start

• Fuel tank is empty or carburetor is not

primed

• Bad glowplug or dead glowdriver battery

• Fuel lines, fuel filter, air cleaner, or muffler is

clogged

• Engine is flooded due to over-priming

• Carburetor is not adjusted properly

• Throttle servo linkage not adjusted properly

• Fill fuel tank with fuel and prime

• Replace glowplug or recharge/replace glowdriver

battery

• Clean or replace clogged part(s)

• Remove glowplug, turn car over to discharge fuel from

cylinder.

Test glowplug and replace if defective

• Set idle and main/slow needle adjusting screw to

standard starting position

• Move throttle servo to neutral position and re-adjust

linkage(s)

Engine starts but

then stalls

• Fuel tank is empty

• Fuel lines, fuel filter, air cleaner, or muffler is

clogged

• Carburetor is not adjusted properly

• Engine has overheated

• Fill fuel tank with fuel

• Clean or replace clogged part(s)

• Re-adjust idle and main/slow needle adjusting screw

• Allow engine to thoroughly cool down and open main

needle adjusting screw 30° turn richer (CCW)

Bad reaction and

response from

engine

• Carburetor is not adjusted properly

• Fuel lines, fuel filter, air cleaner, or muffler is

clogged

• Low fuel pressure from muffler

• Re-adjust main/slow needle adjusting screw

• Clean or replace clogged part(s)

• Properly install pressure line between muffler and fuel

tank

Car is hard to

control

• Weak transmitter and/or receiver batteries

• Low reception from radio antennas

• Servo linkages not adjusted properly

• Recharge or replace batteries

• Fully extend transmitter and receiver antennas

• Move servo to neutral then re-adjust linkage(s)

Steering does not

work properly

• Weak transmitter and/or receiver batteries

• Bent linkages or driveshafts

• Loose steering components

• Drivetrain damage

• Recharge or replace batteries

• Check tightness of steering components and tighten if

necessary

• Replace damaged parts

Handling problems • Shocks are not working properly

• Suspension is binding

• Improper tires

• Rebuild the shocks and replace worn or broken parts

• Make sure suspension moves freely. Replace worn or

broken parts

• Use different tires

Steering feels

sluggish or vague

• Suspension is binding

• Damaged steering servo

• Make sure suspension moves freely, and replace worn

or broken parts

• Check the steering servo for damage and wear, and

replace/repair if necessary

The car does not

drive straight

• Suspension is binding

• Steering trim is off-center

• Wheels are loose

• Damaged steering servo

• Make sure suspension moves freely, and replace worn

or broken parts

• Adjust steering trim until car drives straight

• Check the make sure the wheel nuts are properly

tightened

• Check the steering servo for damage and wear, and

replace/repair if necessary

TROUBLESHOOTING GUIDE

Page 35

Preparing to operate the engine

• Never modify the engine or muffler.

• Confirm the position of needle and idling before running. Be sure to run a new engine smoothly.

• Make sure the air filter is clean and oiled.

• Never run your engine without an air filter. Your engine can be seriously damaged if dirt and debris get inside the engine.

• For proper engine break-in, please refer to the manual that came with the engine.

• The engine may not start or run properly if the air filter is dirty, or choked with sand and dust.

• If the fuel pipe is choked or deteriorates, the engine may not start, and there is danger that fuel leaks out.

Starting and running the engine

Be sure to observe the following starting process. Non-observance will make model car start suddenly, and may lead the damage or unexpected accidents.

1. Make sure the transmitter and receiver batteries are fully charged.

2. Put the car on the starter box and keep the tires from touching the ground.

3. Turn on the switch of the receiver.

4. Turn on the switch of the transmitter.

5. Make sure the steering servo and engine control servo work normally and adjust them correctly.

6. Put the fuel in the fuel tank, and close the cap securely.

7. Apply the glow igniter to the engine glowplug.

8. Push the model car onto the starter box to start the engine. (If the engine is new, follow the instruction manual and be sure to break in the new engine properly).

9. When the engine is running, remove the glow igniter.

10. Follow your engine break-in procedure and tune the engine as appropriate.

Stopping the engine

Before you stop the engine, try to make sure the engine is at idle first.

There are several ways to stop the engine:

1) Use a rag to cover the exhaust tip. Be careful! The exhaust is extremely hot so use a thick rag and gloves.

2) Pinch the fuel tubing to stop the flow of fuel to the carb. Be careful, this can make the motor run lean which can damage the motor.

3) Put your hand over the air filter, or squeeze the air filter element to block the airflow.

4) Press an object (such as a screwdriver handle or shoe) against the rotating flywheel to stop its rotation. Be very careful, and do not stick your hand or fingers near the rotating flywheel.

Finish to operate

1. Stop the engine.

2. Turn off the switch of the receiver.

3. Turn off the switch of the transmitter.

Maintenance after running

Take proper care of your car after running to keep it performing well, and take notice of any damage and wear.

1. Do not leave fuel in the tank.

2. Go outside to drain any residual oil in the exhaust pipe.

3. Clean the car and remove all sand, mud, and other debris.

4. Use after-run oil in your engine after you have finished running for the day.

ENGINE OPERATION

Page 36

XT8 SET-UP

Front upper arm - inner pin Characteristics

Higher position = lower roll center · increases on-power steering

· car is less responsive

· better on smooth, high-grip tracks with long fast corners

Lower position = higher roll center · decreases on-power steering

· car is more responsive

· use in high-grip conditions to avoid traction rolling

· use on tracks with quick direction changes (chicanes)

Front Roll Center

You can raise or lower the front roll center by adjusting the following components:

· Front upper arm inner pin mounting position. Use the eccentric bushings at the front and rear of each pin to raise or lower the pin.

· Front upper camber link outer mounting position. The outer end of the front upper camber link can be attached to the front C-hub blocks in one of 2 positions (inner and outer).

Your XRAY XT8 luxury truggy is a top competition, precision racing machine that features multiple adjustments that allow you to set up for any track condition. The XT8 includes innovative set-up features that allow you to change adjustments quickly and easily.

Please refer to the XT8 Basic Set-Up Sheet for a good overall starting point. After rebuilding the chassis, or in case you become lost with your set-up, always return to the basic starting set-up described here. If you choose to experiment with set up, make small adjustments one at a time, and see if you find any improvement with each adjustment. We strongly advise you to record and keep track of your set-up changes, record which set-ups work best at different racetracks under various conditions. You can use the XRAY XT8 Set-Up Sheet to record your data and set-ups or visit www.teamxray.com where in the Set-up Section you can upload your own set-ups.

This set-up section describes how to adjust your XT8 to suite your driving style. For each individual set-up area, we describe the effects of changing the adjustment, and also how to make the adjustment.

! DROOP

Adjust front/rear droop by adjusting the front/rear down stop screws. Tighten the screws to increase the droop height (less arm movement). Loosen the screws to decrease the droop height (more arm movement).

Droop is a very sensitive adjustment, since it affects and alters weight transfer, and all aspects of chassis performance are affected: braking, acceleration, jumping, traction and rough track handling.

! ROLL CENTER

You can adjust the front and rear roll centers of the XT8 by changing the mounting locations of various components.

Droop height Front/

Rear

Characteristics

Less droop = turning the screw in

Front

· less on power steering

· better for smaller jumps

Rear · less off-power traction

More droop = turning the screw out

Front

· more on power steering

· better handling on rough tracks

Rear

· more rear traction

· better handling on rough tracks

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

TIP: Set the car to full travel as a starting point. The front is usually unchanged and left at full travel. For the front and rear, most drivers will use about 2mm of adjustment range for most North American tracks. Experiment to find the best compromise for your particular track and driving style.

IMPORTANT!

Make equal adjustments on both left and right sides of the car, 1/2 turn of adjustment at a time.

Set screw for droop setting

Page 37

SHOCK OIL

Part Viscosity

359210 100 cSt

359215 150 cSt

359220 200 cSt

359225 250 cSt

359230 300 cSt

359235 350 cSt

359240 400 cSt

359245 450 cSt

359250 500 cSt

359260 600 cSt

359270 700 cSt

359280 800 cSt

359290 900 cSt

Rear roll center Characteristics

Higher · increases on-power traction

· decreases traction under braking

· use to avoid traction rolling at corner entry

· use under low-traction conditions

· reduces rear tire wear

Lower

· decreases rear traction

· use to avoid traction rolling mid-corner and corner exit

REAR ROLL CENTER

You can raise or lower the rear roll center by adjusting the following components:

· Rear upright lower mounting position. The rear lower arm attaches to the rear upright in one of two mounting holes.

· Rear upper camber link mounting position. The inner end of the rear upper camber link can be attached to the rear shock tower in one of 7 positions. The outer end of the rear upper camber link can be attached to the rear upright in one of 3 positions.

! SHOCK ABSORBERS

Adjust the shock absorbers and their mounting positions to suit track conditions.

Piston Hole Type

There are two different types of shock pistons that can be used in the XB8.

Piston hole type Characteristics

Conical up (with dot on the piston)

· less dampening when shock is compressed

· more dampening on rebound

Conical down (with dot on the piston)

· more dampening when shock is compressed

· less dampening on rebound

Straight · equal damping all the time (compressing and rebounding)

PISTON HOLE SIZE

For each type of shock piston (conical or straight holes), there are three pistons with holes of different sizes.

Piston hole size

Characteristics

Smaller · harder damping

· slower chassis weight transfer

· slower response

· decreases chance of bottoming out when landing if used with “thicker” oil

· decreases chassis roll if used with “thicker” oil

· use with thinner oil if track is rough

Larger · softer damping

· increases traction

· quicker chassis weight transfer

· quicker response

· increases chance of bottoming out when landing if used with “thinner ” oil

· increases chassis roll if used with “thinner” oils

· use with thicker oil if track is smooth

SHOCK OIL

You can use shock oils of different weights in a shock absorber.

Shock Oil Characteristics

Thinner · same characteristics as

larger pistons holes

Thicker · same characteristics as

smaller pistons holes

Silicone Shock Oil

XT8 SET-UP

STRAIGHT HOLESCONICAL UP HOLES CONICAL DOWN HOLES

Rear upright - lower pin Effect on Rear Roll Center

Upper hole · lower rear roll center

Lower hole · higher rear roll center

Rear upper camber link

- shocktower

Effect on Rear Roll Center

Upper holes · lower rear roll center

Lower holes · higher rear roll center

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

Note that typically you should use piston hole sizes to suit the track conditions rather than alter the oil viscosity.

Use only the genuine premium quality Xray silicone shock oils. The shock oils are availabe in in these viscosities:

2-HOLE PISTONS DETAIL

1.5

1.4

1.3

1.5

1.4

1.3

XT8 comes with pistons which feature 2 holes. With 2 hole pistons you should usually use thinner shock oils. XRAY offers as an option part pistons with 4 holes (#358037). Using the 4 hole pistons you should use thicker shock oils.

1.3

1.5

1.4

1.3

4-HOLE PISTONS DETAIL

Page 38

SHOCK PRELOAD

Adjust the front/rear shock spring preload by using preload clips of various thicknesses above the shock springs.

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

Shock preload Characteristics

Less preload = thinner/less spacers

· lower ride height

· may give higher corner speed on high bite tracks

· better suited to smooth tracks

More preload = thicker/more spacers

· higher ride height

· less prone to bottoming out

· better suited to rough tracks

! STEERING

You can adjust the Ackermann angle and the spring preload of the central servo saver.

ACKERMANN

Adjust the Ackermann angle by moving the inside ends of the steering rods into different holes in the steering plate.

Steering rod inner mounting position Characteristics

Forward holes = steeper angle · smoothens out steering response

· car reacts smoothly

· better suited to smooth flowing tracks with high speed corners

Rearward holes = shallower angle · quickens initial steering response

· car reacts faster to steering input

· better suited to small, tight tracks

You can use shock springs of different rates to alter performance.

Shock springs Characteristics

Softer · more chassis roll

· more traction

· better on bumpy tracks

· increases chance of bottoming out when landing

Stiffer · less chassis roll

· less traction

· more responsive

· better on smooth tracks

· decreases chance of bottoming out when landing

SHOCK MOUNTING POSITION

You can change the shock mounting position by leaning the shocks at different angles, and also moving the shock closer or further from the centerline of the car. You accomplish this by moving the shock top and bottom mounts to different locations on the shock towers and lower arms

Shock position Characteristics

More inclined = moving in on tower and/or moving out on lower arm

· softer initial damping

· more progressive damping

· more lateral (side) traction

· makes the handling more ”forgiving”

· may be better on high-bite tracks, since it slows down the handling and makes it easier to driver

Less inclined = moving out on tower and/or moving in on lower arm

· harder damping

· less lateral (side) traction

· makes the car more responsive

· usually better suited on technical tracks

XT8 SET-UP

IMPORTANT!

Make equal adjustments on both left and right sides of the steering plate.

UPPER SHOCK

POSITION

REAR LOWER SHOCK POSITION

FRONT LOWER SHOCK POSITION

123

321

Shock spacer

ACKERMAN POSITION

1 2 3

Page 39

SERVO SAVER PRELOAD

Adjust the preload of the central servo saver by adjusting the tension on the spring with the threaded collar.

Servo saver spring preload Characteristics

Softer · less steering

· better suited to standard servos

Stiffer · more steering with a quicker reaction

· better suited to high torque metal-geared servos

! CAMBER

Adjust the front/rear camber by adjusting the lengths of the upper camber linkages. Front upper camber link outer mounting position. The outer end of the front upper camber link can be attached to the front C-hub blocks in one of 2 positions (inner and outer).

Camber angle Front/Rear Characteristics

More negative camber (more inclined) Front · more steering

Rear · decreases rear traction entering and in corners

Less negative camber (more vertical) Front · less steering

Rear

· increases rear traction entering and in corners up to a point

· if the shock is too vertical and traction is lost, the traction will

be lost very abruptly and the car will be hard to control.

Note that you can also change the camber gain by shortening or lengthening the length of the upper camber linkages, and angling them differently by placing the end ball joints in the different holes in shock towers and outer blocks (C-hubs and rear hubs).

Upper arm - length Characteristics

Shorter link = outer hole on tower and/or inner hole on hub

· increases camber gain

· increases traction

Longer link = inner hole on tower and/or outer hole on hub

· decreases camber gain

· car handles smoother

XT8 SET-UP

FRONT CAMBER REAR CAMBER

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

Front upper camber link - front C-hub Characteristics

Inner hole · increases camber gain

· slightly more off-power steering

· slightly quicker steering response

Outer hole · slows down steering response

· decreases camber gain

· steering more “forgiving“

Rear upper camber link - length Characteristics

Shorter link = outer hole on tower and/or inner hole on hub

· increases rear camber gain

· increases traction slightly

· decreases steering and stability

Longer link = inner hole on tower and/or outer hole on hub

· decreases rear camber gain

· increases stability

· slows down the car‘s responsiveness

Page 40

Front kick-up angle Characteristics

More kick-up · more weight transfer to the front of the chassis off-throttle or under braking

· chassis compresses or drops more off-throttle or under braking

· handling is improved on bumpy tracks

· decreased steering response

Less kick-up · less weight transfer to the front of the chassis off-throttle or under braking

· chassis compresses or drops less off-throttle or under braking

· handling is improved on smooth tracks

· increased steering response

After you set the front kick-up angle, you should adjust the angle of the front upper arm inner pin so that it is parallel with the front lower arm. This will help to prevent binding during suspension movement. Each front upper arm inner pin rides in two eccentric bushings (one on each end). By using different combinations of positions, you can angle the pin. Note that these eccentric bushings are also used to adjust the front roll center.

FRONT KICK-UP — I.S.S (optional)

! FRONT KICK-UP

= 4° = 5°

Kick-up

C-Hub caster 4° 5° 6° 7° 8°

17° 21° 22° 23° 24° 25°

16° 20° 21° 22° 23° 24°

15° 19° 20° 21° 22° 23°

14° 18° 19° 20° 21° 22°

13° 17° 18° 19° 20° 21°

* Arm will be in contact with the diff outdrive

Front eccentric bushing Kick-up Rear eccentric bushing

Upper position 6° * Upper position

Upper position 7° * Middle position Upper position 8° Lower position

Middle position 5° * Upper position

Middle position 6° Middle position

Middle position 7° Lower position

Lower position 4° Upper position

Lower position 5° Middle position Lower position 6° Lower position

TOTAL CASTER = C-HUB CASTER + KICK UP

1 0

Total caster value is the combination of C-hub caster + kick-up. Once you set the C-hub caster, you have to add the value of kick-up to calculate the total caster. Example: C-hub caster = 15° Kick-up = 4° Total caster = 15+4 = 19° final caster.

TOTAL CASTER: STANDARD PARTS (19° or 20°)

Using standard parts, the XT8 has a total caster range of only 19°~20°, depending on the kick-up plate used (4° or 5° plate).

TOTAL CASTER: OPTIONAL PARTS (17~25° range)

Using optional parts, the XT8 can have a total caster range of 17~25°. Optional parts include: caster eccentric bushings (for C-hub), and kick-up plates + eccentric inserts.

Kick-up

C-Hub caster 4° 5°

15° 19° 20°

To obtain this total caster range, use the following I.S.S. parts: #352311 Front plate, #352320 Rear plate, #352315 Eccentric inserts, #357212 Inner pins, #352174 Caster bushings (1°) or #352175 Caster bushings (2°).

Note: You cannot combine composite plates (std) and I.S.S. plates (with eccentric bushings). Also, you must use the appropriate inner pivot pins (shorter) with I.S.S. components.

C-HUB CASTER: STANDARD PARTS (15°)

Using standard parts, the XT8 front C-hub has a preset value of 15° caster.

Caster angle Characteristics

Less caster (block more vertical) · increases off-power steering into a corner

· decreases on-power steering out of and in a corner

· decreases straight-line stability

More caster (block more laid-back) · decreases off-power steering into a corner

· increases on-power steering out of and in a corner

· increases straight-line stability

After you have set the caster using the eccentric bushings, you need to set the front upper arm position. Remove all clips around the front upper arm and move the front suspension a few times to let it settle. The front upper arm will move to its optimal position on the pin. Then insert the clips around the arm so that the arm stays in its optimum position.

The caster of C-hub is set using different optional eccentric bushings in different orientations. Refer to the table above.

= 13° caster

= 14° caster

= 15° caster

= 16° caster

= 17° caster

13~17°

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

! CASTER

C-HUB CASTER: I.A.C (OPTIONAL) (13~17° RANGE)

Using optional caster eccentric bushings, the XT8 front C-hub can have a caster range of 13~17°. Optional caster eccentric bushings (#352174, #352175) are used in the front lower arms (in front of the C-hub).

STANDARD PARTS

Using standard parts included in the XT8 kit, you can easily adjust the kick-up of the front lower arms by changing the lower plate at the REAR of the front bulkhead. You can use either the 4° or 5° plate.

OPTIONAL PARTS

Using the following optional I.S.S. parts, you can easily adjust kick-up of the front lower arms between 4~8°: #352311 front plate, #352320 rear plate, #352315 eccentric bushings, #357212 lower inner pin

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

NOTE: You cannot combine composite plates (std) and I.S.S. plates (with eccentric bushings). Also, you must use the appropriate inner pivot pins (shorter) with I.S.S. components.

XT8 SET-UP

Page 41

REAR TOE-IN

Rear toe-in is adjustable on the XT8 through the use of various plates that capture the rear lower inner pins. Additional adjustability is available through the use of optional I.S.S. plates, eccentric bushings, and pins.

Rear toe-in angle Characteristics

More rear toe-in · increases stability under braking

· increases stability on power at corner exit

· decreases top speed

· if too much rear toe-in is used, the car will be twitchy to drive and harder to recover if it loses traction

Less rear toe-in · increases steering

· decreases stability on power at corner exit

· increases top speed

· if the car slides, it will be much easier to control

REAR TOE-IN: I.S.S. (OPTIONAL)

Using the following optional I.S.S. parts, the XT8 can have rear toe-in angles between 2~4° in 0.5° increments. This is adjusted by using various rear plates and eccentric bushings on the rear bulkhead. Various anti-squat values are also possible, depending on the plates & bushings used.

= 2°

= 3°

REAR TOE-IN

2°

2.5°

3°

3.5°

4°

2-4

0 0

LEFT SIDE MUST BE OPPOSITE TO THE RIGHT SIDE

(rear plate)

#353312 front plate #353323 rear plate #352315 eccentric bushings #357212 lower inner pins

The bushings in the REAR plate control the rear toe-in angle. (The bushings in the FRONT plate control the rear anti- squat angle.)

IMPORTANT!

You cannot combine composite plates (std) and I.S.S. plates (with eccentric bushings). Also, you must use the appropriate inner pivot pins (shorter) with I.S.S. components.

REAR TOE-IN: STANDARD PARTS

Using standard parts included in the XT8 kit, you can easily adjust the rear toe-in by changing the lower plate at the REAR of the rear bulkhead. You can use either the 2° or 3° plate.

XT8 SET-UP

! TOE

FRONT TOE

Adjust front toe by adjusting the length of the left and right steering rods.

Steering rod length Characteristics

More front toe-in = longer steering rod

· increases straight-line stability

· decreases steering response

· increases steering mid-corner and on-power corner exit

More front toe-out = shorter steering rod

· decreases straight-line stability

· increases initial steering response

· decreases steering on-power at corner exit

FRONT TOE

OUT

REAR TOE

Page 42

! ANTI-ROLL BARS

Adjust the stiffness of the front or rear anti-roll bar by using a thinner or thicker wire.

Anti-roll bar stiffness Front/Rear Characteristics

Softer = thinner wire Front · increases front chassis roll

· increases front traction

· decreases rear traction

· increases off-power steering (may cause oversteer)

Rear · increases rear chassis roll

· increases rear traction

· decreases front traction

· decreases on-power steering (increases understeer)

Stiffer = thicker wire Front · decreases front chassis roll

· decreases front traction

· decreases off-power steering at corner entry (increases understeer)

· quicker steering response

Rear · decreases rear chassis roll

· decreases rear traction

· increases front traction

· increases on-power steering (may cause oversteer)

· quicker steering response in high speed chicanes

Rear anti-squat angle Characteristics

Less anti-squat = flatter arm

· increases rear traction off-power

· decreases rear traction on-power

· better on a bumpy track

More anti-squat = leaning more backwards

· increases rear traction during acceleration

· decreases rear traction off-power

· better on smooth and/or slippery tracks

! WHEELBASE

Adjust the wheelbase by using the spacers on either side of the rear uprights (at the bottom pin).

IMPORTANT!

Make equal adjustments on both left and right sides of the car.

Wheelbase Characteristics

Shorter wheelbase = less spacers in front of rear upright

· increases rearward weight transfer during acceleration

· increases on-power traction

· quicker off-power steering into corners

· slight tendency to push on-power at corner exit

· increases steering response

· better on tighter, more technical tracks

Longer wheelbase = more spacers in front of rear upright

· decreases off-power steering into sharp corners

· increases stability

· slower initial steering reaction (off-power)

· improves on-power steering at corner exit

· better handling over bumps and ruts

· better on more open tracks with high-speed corners

! REAR ANTI-SQUAT

REAR ANTI-SQUAT: STANDARD PARTS

Using standard parts included in the XT8 kit, you can easily adjust the rear anti-squat by changing the lower plate at the FRONT of the rear bulkhead. You can use either the 1° or 2° plate.

= 1° = 2°

XT8 SET-UP

363mm 365.5mm 368mm

REAR ANTI-SQUAT: I.S.S. (optional)

Using the following optional I.S.S. parts, you can easily adjust rear anti- squat to 2~4°: #353312 Front plate 2-4° anti-squat, #353323 Rear plate 2-4° toe-in, #352315 Eccentric

inserts, #357212 Inner pins.

The bushings in the FRONT plate control the rear anti- squat angle. (The bushings in the REAR plate control the rear toe-in angle.)

IMPORTANT!

You cannot combine composite plates (std) and I.S.S. plates (with eccentric bushings). Also, you must use the appropriate inner pivot pins (shorter) with I.S.S. components.

01 2

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DIFF OIL

Part Viscosity

359301 1000 cSt

359302 2000 cSt

359303 3000 cSt

359305 5000 cSt

359307 7000 cSt

359310 10 000 cSt

359320 20 000 cSt

359330 30 000 cSt

359340 40 000 cSt

359350 50 000 cSt

359360 60 000 cSt

359380 80 000 cSt

359392 100 000 cSt

! DIFFERENTIALS

Adjust the characteristics of the differentials by using thinner or thicker silicone oil.

Differential Oil thickness Characteristics

Front Thinner · increases steering into corners (off-power)

· if oil is too thin the steering may become inconsistent, especially it can lose forward traction (and steering) during acceleration out of corners

Thicker · increases stability into corners during braking

· increases steering on-power at corner exit

Center Thinner · front wheels unload more during acceleration

· decreases on-power steering (reduces oversteer)

· easier to drive on rough tracks

· if a high-power engine is used you could waste too much power and sometime “cook” the oil in the center differential because it “overloads”

Thicker · more all-wheel drive effect

· better acceleration

· increases on-power steering (reduces understeer)

· better suited on high-bite, smooth tracks

· car can be more nervous to drive especially if a high power engine is used - you might need to be smooth on the throttle

Rear Thinner · increases cornering traction

· increases steering into corner

Thicker · decreases rear traction while cornering

· reduces wheelspin

Wing position/angle Characteristics

Higher · increases stability at higher speeds

Lower · increases stability at lower speeds

Forward · decreases rear traction

Rearward · increases rear traction

Flatter angle · level jumping or nose-diving

Steeper angle · increases traction at higher speeds

· less nose-diving

! CLUTCH

You can adjust the engagement characteristics of the clutch by changing the clutch springs or changing the orientation of the clutch shoes.

Clutch springs Characteristics

Thinner (0.9mm) · clutch engages earlier at lower RPM

· more gradual acceleration

· easier to drive but not as aggressive

Thicker (1.0mm) · clutch engages later at higher RPM

· more sudden acceleration

· car is more aggressive

CLUTCH SHOE ORIENTATION

Adjust the engagement characteristics of the clutch by changing the orientation of the clutch shoes.

Clutch shoe orientation Characteristics

Trailing shoes · clutch engages more smoothly

· more ideal for slick track conditions

Leading shoes · clutch engages more aggressively

· more ideal on high-traction tracks

! REAR WING

Adjust the position and angle of the rear wing using the different mounting position of the wing supports.

Trailing shoes Leading shoes

SILICONE

DIFF OIL

XT8 SET-UP

IMPORTANT!

Make equal adjustments on both left and right sides of the rear wing.

Changing the oil in the front differential affects overall steering response. Changing the oil in the center differential affects the front-to-rear drive. Changing the oil in the rear differential affects cornering traction and overall steering.

Use only the genuine premium quality XRAY silicone diff oils. The differential oils are availabe in 50ml size in these viscosities:

CLUTCH SPRINGS

Adjust the engagement characteristics of the clutch by using different clutch springs.

Page 44

XRAY, K VÝSTAVISKU 6992, 91101 TRENCIN, SLOVAKIA, EUROPE

PHONE: +421-32-740 11 00, FAX: +421-32-740 11 09, info@teamxray.com

XRAY, K VÝSTAVISKU 6992, 91101 TRENCIN, SLOVAKIA, EUROPE

PHONE: +421-32-740 11 00, FAX: +421-32-740 11 09, info@teamxray.com

XRAY, K VÝSTAVISKU 6992, 91101 TRENCIN, SLOVAKIA, EUROPE

PHONE: +421-32-740 11 00, FAX: +421-32-740 11 09, info@teamxray.com

XRAY, K VÝSTAVISKU 6992, 91101 TRENCIN, SLOVAKIA, EUROPE

PHONE: +421-32-740 11 00, FAX: +421-32-740 11 09, info@teamxray.com

RC AMERICA, 167 TURTLE CREEK BLVD. SUITE C, .DALLAS, 752 07 TEXAS, USA

PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com

RC AMERICA, 167 TURTLE CREEK BLVD. SUITE C, .DALLAS, 752 07 TEXAS, USA

PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com

RC AMERICA, 167 TURTLE CREEK BLVD. SUITE C, .DALLAS, 752 07 TEXAS, USA

PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com

RC AMERICA, 167 TURTLE CREEK BLVD. SUITE C, .DALLAS, 752 07 TEXAS, USA

PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com

581703 9103058

581703 9104428