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Xray GTX8 Instruction Manual
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Xray GTX8 Instruction Manual

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Summary of Contents for Xray GTX8

  • Page 2: Safety Precautions

    RC model racing cars. This is not a toy; it is a precision racing reason you decide the GTX8 is not what you wanted or expected, do not continue any further. Your hobby dealer model.
  • Page 3 • Make sure all fasteners are properly tightened. Check them periodically. Therefore we ask you, if at all possible, to purchase XRAY products at your hobby dealer and give them • Make sure that chassis screws do not protrude from the chassis.
  • Page 4 (HUDY #106631 300.000cSt 100ml) To ensure that you always have access to the most up-to- date version of the XRAY Set-up Book, XRAY will now be offering only the digital online version at our website at www.teamxray.com. By offering this online version...
  • Page 5 XB8 TECH TIPS FRONT & REAR DIFF GEAR MESH ADJUSTMENT If there is too much or too little diff side play, this may create non-optimal gear mesh between the diff 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.
  • Page 6 1. FRONT & REAR DIFFERENTIALS #355105 ACTIVE FRONT DIFF 355063 • High-performance adjustable front Active Differential™ for improved speed & handling 940816 • Fully adjustable on- and off-power performance using different internal segments and gears • Improved diff action and traction •...
  • Page 7 1. FRONT & REAR DIFFERENTIALS Graphite Grease (HUDY #106210) ➋ ➌ 940816 BB 8x16x5 Graphite Grease (HUDY #106210) STEP DETAIL ➎ Use HUDY Ball-Bearing Grease ➍ DETAIL #106220 - STANDARD 964060 ➊ #106221 - BLUE S 6x18x0.2 #106222 - RED ➎...
  • Page 8 2. FRONT TRANSMISSION 355425 980314 355472 SHORT 901404 355471 355416 352006 355236 940816 355114 352006 940816 902312 355003 FRONT DIFF 35 2006 DIFF BULKHEAD BLOCK SET FRONT/REAR 35 5472 DRIVE SHAFT BOOT (2) 35 5003 FRONT/REAR DIFFERENTIAL 46T - SET 35 5114 BEVEL DRIVE GEAR 14T 90 1404...
  • Page 9 2. REAR TRANSMISSION 355640 980314 355472 LONG 355471 901404 355416 352006 355236 355114 940816 353040 352006 940816 902312 355003 REAR DIFF 902312 35 5471 DRIVE SHAFT LOCKING RING (2) 35 2006 DIFF BULKHEAD BLOCK SET FRONT/REAR 35 5472 DRIVE SHAFT BOOT (2) 35 5003 FRONT/REAR DIFFERENTIAL 46T - SET 35 3040...

  • Page 10: Screw Phillips Ss 3

    3. REAR SUSPENSION #353115 COMPOSITE REAR LOWER SUSPENSION ARM REAR ANTI-ROLL BARS #353316 ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL CENTER #353422 ø2.2mm OPTION #353327 ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL CENTER #353424 ø2.4mm OPTION #353425 ø2.5mm...
  • Page 11 TRACK WIDTH The new XRAY rear alu lower suspension holders provide even greater range of adjustment for the rear suspension. Using different combinations of eccentric bushings, fine adjustment of rear anti-squat, rear toe-in, rear roll center, and rear track-width can be obtained. For more information about the influence of rear anti-squat, rear toe-in, rear roll center and rear track width on car handling, please refer to HUDY Off-Road Set-up Book (#209099).
  • Page 12 3. REAR SUSPENSION DETAIL 1.5mm 901312 SB M3x12 Follow the TECH TIP on page 5 to install the pivot balls STEP DETAIL ➍ -2~0mm 901303 SB M3x3 901305 SB M3x5 DETAIL 902318 3x3mm ➌ SH M3x18 903308 SFH M3x8 3x18mm ➋...
  • Page 13 4. REAR SUSPENSION 902318 353160 OFFSET WHEEL AXLES #355250 INCLUDED #355251 +1mm OPTION #355252 +2mm OPTION 960030 353131 903312 353131 352633 353020 352657 353523 980263 355221 960030 903416 355237 902320 352234 353352 355211 353370 980317 941319 940814 353370 355250 357331 902318 901504 #355222...
  • Page 14 4. REAR SUSPENSION 353370 SHIM 3x9x1 Ensure that the rear upright moves freely. If it does not move freely, use sandpaper to thin both wheelbase adjustment shims. 353370 Shims for wheelbase SHIM 3x9x2 adjustment 960030 N M3 Do not overtighten the self-locking nut. Overtightening may result in suspension binding.
  • Page 15 4. REAR SUSPENSION DETAIL 902318 INITIAL SETTING SH M3x18 960030 N M3 INITIAL SETTING 353380 SHIM 4x7.5x1 Optional shims can be used for roll center adjustment. #353380 - Alu shim 4x7.5x1mm #353381 - Alu shim 4x7.5x2mm 353381 SHIM 4x7.5x2 903312 SFH M3x12 3x20mm 902318...
  • Page 16 5. FRONT SUSPENSION #333451 ALU ANTI-ROLL BAR PIVOT BALL 5.8 MM - SWISS 7075 T6 - HARDCOATED (2) 909372 352324 352314 901410 357212 353371 352314 902318 352323 353371 909395 352120 352006 901303 352496 333450 901305 352470 903308 901312 352470 352460 FRONT ANTI-ROLL BARS #352492 2.2mm OPTION...
  • Page 17 =308 =306 Outer position = 1mm or 1° from center =310 The XRAY alu front lower suspension holders provide even greater range of SET-UP adjustment for the front suspension. Using different combinations of eccentric BOOK The tables below describe the amounts of kick-up, front track-width change depending on the combinations bushings, fine adjustment of front kick-up, roll center, and front track-width of eccentric bushings used with 0 and 1mm, 1°...
  • Page 18 5. FRONT SUSPENSION DETAIL 1.5mm 901312 SB M3x12 Follow the TECH TIP on page 5 to install the pivot balls STEP DETAIL ➍ -2~0mm 901303 SB M3x3 901305 SB M3x5 DETAIL 3x3mm ➍ 902318 ➋ SH M3x18 3x18mm ➌ 903308 SFH M3x8 ➊...

  • Page 19: Pivot Ball 5

    6. FRONT SUSPENSION OFFSET WHEEL AXLES 352624 #355250 0mm INCLUDED 352153 352142 #355251 +1mm OPTION #355252 +2mm OPTION 353172 352376 352132 903416 352624 #357253 BRASS ADJUSTING NUT M15x1 352153 980263 355221 903416 353172 352376 #357251 ALU PIVOT BALL 13.7MM WITH STEEL SCREW (2) 352240 980317 355237...
  • Page 20 6. FRONT SUSPENSION #357251 ALU PIVOT BALL 13.7MM WITH STEEL SCREW (2) DETAIL Tighten composite hex nuts using HUDY tool #107581 PIVOT BALLS MUST MOVE FREELY #357253 During initial assembly, tighten each BRASS ADJUSTING NUT M15x1 composite hex nut until the pivot ball starts to bind, then loosen slightly.

  • Page 21: Hex Screw Sh

    6. FRONT & REAR ASSEMBLY 960030 902325 960040 353083 351232 351130 903412 #353281 GT GRAPHITE BRACES FOR REAR COMPOSITE BRACE - SET 960030 353281 903412 353281 902312 90 2325 HEX SCREW SH M3x25 (10) 35 1130 GT ALU CHASSIS - SWISS 7075 T6 (3MM) 90 3412 HEX SCREW SFH M4x12 (10) 35 1232...
  • Page 22 6. FRONT & REAR ASSEMBLY #353281 GRAPHITE BRACE SET for extra stiffness adjustment. 902325 SH M3x25 NOTE ORIENTATION 903412 SFH M4x12 960030 N M3 960040 N M4 903412 SFH M4x12...

  • Page 23: Composite Square Adj. Roll Center Bushings -

    7. STEERING #352514 BALL STUD 6.8mm WITH BACKSTOP COMPOSITE SERVO SAVER - GRAPHITE #352658 L=6MM - M3x8 OPTION 903312 #352659 L=6MM - M3x11 OPTION 903310 903312 903308 902312 351344 940610 352084 352505 960030 352513 902312 960040 352576 903412 352314 352513 902310 960030 357222...
  • Page 24 7. STEERING INITIAL PRELOAD SETTING DETAIL 970121 DETAIL O 12.1x1.6 SET-UP BOOK SERVO SAVER HUDY Tool Allen 3.0mm 902308 SH M3x8 NOTE ORIENTATION DETAIL For servicing use Bearing Oil (HUDY #106230) 903410 SFH M4x10 940610 BB 6x10x3...
  • Page 25 7. STEERING All possible mounting alternatives of eccentric bushings 903308 SFH M3x8 DETAIL SET-UP NOTE ORIENTATION BOOK INITIAL SETTING ROLL CENTER DO NOT OVERTIGHTEN SCREWS 3x12mm DETAIL 3x12mm 3x10mm 3x10mm 3x12mm 902312 SH M3x12 903310 Check for free SFH M3x10 movement DETAIL After the top deck assembly check for free movement of steering system.
  • Page 26 7. STEERING Caster shims 1.0mm 2.0mm 902312 SH M3x12 962041 SHIM 4x8x0.5 0.5mm Clearance shim INITIAL POSITION NOTE ORIENTATION All possible mounting alternatives of eccentric bushings DETAIL NOTE ORIENTATION Cutaway view Shock Tower CASTER UPPER CLIP LOWER SHIM (Behind arm) UPPER CLIP Behind arm (Behind arm)
  • Page 27 8. CENTER DIFF & BRAKE #354131 #354112 GLUED BRAKE PADS SET-ULTRA EFFICIENT (4) LIGHTWEIGHT VENTILATED BRAKE DISK - LASER CUT - PRECISION-GROUND (2) 901304 354061 354061 For improved brake efficiency and increased lifespan 902316 902330 use the OPTION brake bads with springs. 354130 354121 #354132...
  • Page 28 8. CENTER DIFF & BRAKE STEEL FIBRE FIBRE STEEL OVAL HOLE NOTE ORIENTATION ROUND HOLE Roughen steel plates with sandpaper before gluing fibre pads ROUND HOLE #354132 NOTE ORIENTATION BRAKE PAD “SLS” (4) OVAL HOLE 902316 NOTE ORIENTATION SH M3x16 DETAIL Fibre pads #354131...
  • Page 29 8. CENTER DIFF & BRAKE NOTE ORIENTATION NOTE ORIENTATION 903308 OF ALL PARTS SFH M3x8 3x8mm 903412 SFH M4x12 4x12mm SHIFT-POINT SCREW ➎ 901305 SB M3x5 ➍ SHOE-GAP SETSCREW ➊ ➌ ➋ 902314 SH M3x14 Setscrews must ➋ NOT protrude 983404 RP 4x4 NOTE ORIENTATION...
  • Page 30 8. CENTER DIFF & BRAKE 901404 DETAIL SB M4x4 BEARING OIL NOTE ORIENTATION NOTE NOTE 940817 ORIENTATION ORIENTATION NOTE BB 8x16x5 ORIENTATION 981310 ONE WAY LUBE P 3x10 BEARING OIL COMPOSITE GRAPHITE 2-SPEED GEARS 2-SPEED GEARS #345545 45T 2ND OPTION #345645 45T 2ND OPTION #345546 46T 2ND INCLUDED #345646 46T 2ND OPTION...
  • Page 31 9. FUEL TANK & ENGINE #358605 FUEL TANK 125CC WITH Manifold FLOATING FILTER 908312 (NOT INCLUDED) Exhaust Pipe (NOT INCLUDED) 358606 902316 Screw 906206 (NOT INCLUDED) 358941 964073 / 964074 / 964075 358532 Engine 358588 (NOT INCLUDED) 358540 (OPTION) 359051 358550 358510 358564...
  • Page 32 Use appropriate shims to achieve proper S 7x10x0.2 clutchbell endplay Use the cone included with your engine, or use OPTION XRAY cone #358540 964074 S 7x10x0.3 When installing the engine, first check that the drive shaft does not touch the engine. If it does, remove some material from the engine mount as shown to make some room between engine and shaft.
  • Page 33 OPTION #358564 ALU - HARD (3) INCLUDED 908314 SCH M3x14 5x12x4mm TO TIGHTEN THE 16T OR 19T PINION GEAR USE THE OPTIONAL #349901 XRAY PINION TOOL (19~21T / 16~18T). Hold the flywheel using HUDY Flywheel Tool #182015 5x10x4mm SET-UP BOOK...
  • Page 34 9. FUEL TANK & ENGINE ALTERNATIVE 150CC FUEL TANK ALTERNATIVE 125CC FUEL TANK INITIAL SETTING #358605 FUEL TANK 125CC WITH FLOATING FILTER 353370 SHIM 3x9x2 3x16mm 3x16mm DETAIL 902316 SH M3x16 2.2x6mm 3x9x2mm 903310 SFH M3x10 3x9x2mm 906206 SFP 2.2x6 3x10mm 3x10mm After running your engine, apply...
  • Page 35 10. RADIO CASE Servo Screw (NOT INCLUDED) 902306 356200 (NOT INCLUDED) Personal transponder 902312 (NOT INCLUDED) 902310 902314 356004 352460 352460 352670 306310 902310 302611 960030 902312 356004 902314 356004 Receiver Servo Grommet (NOT INCLUDED) (NOT INCLUDED) 356004 Steering Servo (NOT INCLUDED) Receiver battery 902314...
  • Page 36 10. RADIO CASE step Servo screw (NOT INCLUDED) Plug the connectors into the receiver in Step 2 902314 SH M3x14 NOTE NOTE ORIENTATION Use the shims only if the servo is too high and extends from the case step 3x10mm Use foam to cushion the inside of the radio case so the receiver and battery...
  • Page 37 GT SHOCK SHAFT (2) 35 8019 COMPOSITE SET OF SHIMS FOR SHOCKS - V2 (2) 35 8196 XRAY GT SPRING - 3 DOTS (2) 35 8020 COMPOSITE SHOCK PARTS 35 8032 SHOCK PISTON SET 8-HOLE (1.2; 1.3) 10-H. (1.1MM) - DELRIN - V2 96 0026 NUT M2.5 - SHORT (10)
  • Page 38 1 1. SHOCK ABSORBERS 6 holes 358040 ø1.2mm pistons DETAIL DETAIL S 2.5x6x0.5 INCORRECT CORRECT 960026 N M2.5 DO NOT OVERTIGHTEN TIGHTEN GENTLY NOTE ORIENTATION The self-locking nut is overtightened, The self-locking nut is gently tightened. causing distortion of the piston. This will The piston remains undistorted and fits negatively affect the free movement of inside the shock body perfectly, ensuring...
  • Page 39 1 1. SHOCK ABSORBERS DETAIL 970180 O 18x1.8 1 mm DETAIL 3 mm Grip the shock rod at top of exposed threads with side cutting pliers. Be DETAIL careful not to damage the shock rod. CORRECT INCORRECT INCORRECT DEFAULT SHOCK REBOUND SETTING 0% (LOW REBOUND) Follow the steps below to set the shock rebound to the default setting of 0%.
  • Page 40 1 1. SHOCK ABSORBERS SHOCK PRELOAD DETAIL 971034 O 3.4x2 SET-UP BOOK SPRING RATE SHOCK PRELOAD RIDE HEIGHT ALTERNATE SHOCK REBOUND SETTING (50% AND 100%) The default shock rebound setting is 0% (as described on page 40). Alternatively, you may set the shock rebound setting to 50% or 100% as described below. Remove the shock springs before performing shock rebound adjustment. SETTING THE SHOCK REBOUND TO 50% (MEDIUM REBOUND) HALF TIGHTEN...

  • Page 41: Final Assembly

    901306 960030 355261 351232 302663 302630 351210 351220 362651 362652 FRONT 362280 960030 SHOCK 303123 902319 351201 #359730 XRAY GT BODY (NOT INCLUDED) 903414 903414 WHEEL NUTS #355261 OPEN INCLUDED 903416 903414 #293560 COVERED OPTION #355265 COVERED OPTION 30 2291...
  • Page 42 12. FINAL ASSEMBLY SHORTER LONGER DETAIL NOTE ORIENTATION INITIAL SETTING 902318 902319 SH M3x18 SH M3x18 LEFT thread The lower shock position can not be used. STANDARD 960030 M3x18 screw N M3 DETAIL SET-UP 3x18mm INITIAL SETTING On the front right arm use the SILVER M3x18 BOOK...
  • Page 43 12. FINAL ASSEMBLY NOTE ORIENTATION 901303 SB M3x3 SILICONE 8mm THREAD TUBING 961022 S 2.2 10mm THREAD 4 . 3 m 8mm THREAD 303123 Servo screw SHIM 3x6x2 (NOT INCLUDED) 3x6x2mm 10mm THREAD NOTE ORIENTATION CONICAL SHIM 3x6x2mm 362280 CON. SHIM 3x6x2 Ensure that the servo is in neutral position Remove the screws from mounting plate and servo horn ➊...
  • Page 44 12. FINAL ASSEMBLY 901306 SB M3x6 approx. 52mm NOTE ORIENTATION Cut off remaining 902310 material SH M3x10 901306 SB M3x6 approx. 37mm NOTE ORIENTATION Cut off remaining material 902325 DETAIL SH M3x25 NOTE ORIENTATION 960030 N M3 ➐ Wheel & Tire (NOT INCLUDED) To tighten the screw you can also use the #107570 HUDY 17mm Wheel Nut Tool...
  • Page 45 12. FINAL ASSEMBLY #358832 AIR FILTER RAIN COVER 902308 SH M3x8 Apply #106240 HUDY air filter oil and follow the engine instructions to service the air filter. Cut the silicone tube depending on engine and muffler. Use the plastic clips to hold the tubes together. SILICONE TUBE MARKED AS BLUE = FROM FUEL TANK TO CARBURETOR SILICONE TUBE MARKED AS...
  • Page 46 MAINTENANCE ENGINE OPERATION PREPARING TO OPERATE THE ENGINE • Never modify the engine or muffler. • For proper engine break-in, please refer to the manual that came with the engine. • Confirm the position of needle and idling before running. Be sure to run a new engine smoothly. •...

  • Page 47: Troubleshooting Guide

    THROTTLE LINKAGE ADJUSTMENT NEUTRAL (IDLE) ADJUST INDIVIDUAL LINKAGES SEPARATELY TO AVOID INTERFERING WITH THE OPERATION OF THE OTHERS 0.5mm ~1mm ENGINE IDLING IDLING ADJUSTMENT SCREW. Use to adjust the idle setting of the • Turn on the transmitter and receiver and set the engine control servo trim to the neutral position. carburetor.
  • Page 48 RC AMERICA, 2030 Century Center Blvd #15, Irving, TX 75062, USA PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com /TeamXray /TeamXray /TeamXray /XrayRacing /+TeamXrayRC /XrayRacing...