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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 [email protected].

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 with or disrupt pedestrian or vehicular 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: [email protected]

We have made every effort to make these instructions as easy to understand as possible. 

However, if you have any diffi culties, problems, or questions, please do not hesitate to 

contact the XRAY support team at [email protected]. Also, please visit our Web site 

at www.teamxray.com to fi nd the latest updates, set-up information, option parts, and 

many other goodies. We pride ourselves on taking excellent care of our customers.

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

www.teamxray.com

XRAY USA

RCAmerica, 167 Turtle Creek Boulevard Suite C      

Dallas, Texas 75207

USA

Phone: (800) 519-7221 * (214) 744-2400

Fax: (214) 744-2401

Email: [email protected]

   IMPORTANT NOTES – NITRO ENGINES

• Always test the brakes and the throttle before starting your engine to avoid losing 

control of the model.

• Make sure the air 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!

Summary of Contents for XT8

Page 1: ......

Page 2: ...h 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...

Page 3: ...e 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 lo...

Page 4: ...k Oil Silicone Diff Oil Air Filter Oil 5 cell 1200NiMh Receiver Pack Transmitter 21 Engine Manifold Exhaust Glow Plug Igniter Starter Box Battery Pack Steering and Throttle Servos Battery Charger Tran...

Page 5: ...G 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 6x18...

Page 6: ...ng 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...

Page 7: ...KET 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...

Page 8: ...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 CENTER DIFFERENTI...

Page 9: ...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...

Page 10: ...D 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 1...

Page 11: ...ide 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 b...

Page 12: ...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 1...

Page 13: ...EEL 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 1...

Page 14: ...2 INITIAL POSITIONS 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 Note location of not...

Page 15: ...ITH 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 90 937...

Page 16: ...RIVE 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...

Page 17: ...t 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 INITI...

Page 18: ...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...

Page 19: ...19 903312 SFH M3x12 902312 SH M3x12 903412 SFH M4x12 960030 N M3 FRONT REAR ASSEMBLY SFH M3x12 SH M3x12 DETAIL...

Page 20: ...663 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...

Page 21: ...SFH M4x10 903310 SFH M3x10 960030 N M3 903312 SFH M3x12 960030 N M3 STEERING 2x L R 3x10 3x8 3x8 3x12 L R 4x10 FASTEN TIGHTLY 65 5 mm Tighten all steering fasteners securely 3x14 INITIAL POSITION 3x1...

Page 22: ...TILATED 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...

Page 23: ...8 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 O...

Page 24: ...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...

Page 25: ...iate 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 a...

Page 26: ...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 thread Right thread Ball joints must be 90 to e...

Page 27: ...0 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 Routeservoleadsthrough this ga...

Page 28: ...on The self locking nut is overtightened causingdistortion 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...

Page 29: ...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...

Page 30: ...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...

Page 31: ...20 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 Tighte...

Page 32: ...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...

Page 33: ...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...

Page 34: ...n 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 linka...

Page 35: ...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 i...

Page 36: ...s 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 h...

Page 37: ...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 wh...

Page 38: ...ngs 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 smoot...

Page 39: ...o 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 differen...

Page 40: ...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...

Page 41: ...IN 2 2 5 3 3 5 4 2 4 1 1 5 5 0 0 5 5 1 1 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...

Page 42: ...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 qui...

Page 43: ...ower 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 l...

Page 44: ...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 74...

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