Xray XB8 Instruction Manual
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Xray XB8 Instruction Manual

Xray xb8 1/8 nitro buggy instruction manual
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  • Page 2: Safety Precautions

    Phone: (800) 519-7221 * (214) 744-2400 many other goodies. We pride ourselves on taking excellent care of our customers. Fax: +421-32-7401109 Fax: (214) 744-2401 You can join thousands of XRAY fans and enthusiasts in our online community at: Email: info@teamxray.com Email: xray@rcamerica.com www.teamxray.com Failure to follow these instructions will be considered as abuse and/or neglect.
  • Page 3 • Make sure that chassis screws do not protrude from the chassis. Please support your local hobby shop. We at XRAY Model Racing Cars support all local • For the best performance, it is very important that great care is taken to ensure the hobby dealers.

  • Page 4: Symbols Used

    SYMBOLS USED Part bags used Assemble in the Assemble left and Assemble front Pay attention Assemble as Apply instant Apply oil Apply grease Apply many times specified order right sides the and rear the same here glue threadlock as specified same way (here twice) ➊...

  • Page 5: Graphite Parts

    XB8 TECH TIPS FRONT & REAR DIFF GEAR MESH ADJUSTMENT Before filling in the differentials with oil we suggest that you first check gear mesh as below. 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.
  • Page 6 • Fully adjustable on- and off-power performance using different internal segments and gears • Improves diff action and increases traction • Easy and consistent steering 35 5003 XB8 FRONT/REAR DIFFERENTIAL 46T - SET 90 3312 HEX SCREW SFH M3x12 (10) BAGS...

  • Page 7: Very Important

    FRONT & REAR DIFFERENTIALS ➌ 940816 Graphite Grease BB 8x16x5 (HUDY #106210) ➋ Graphite Grease (HUDY #106210) STEP DETAIL ➎ Use HUDY Ball-Bearing ➍ ➊ Grease or Oil for servicing: 964060 #106220 - Standard S 6x18x0.2 #106221 - Extra #106222 - Premium #106230 - Bearing Oil ➎...

  • Page 8: Center Differential

    CENTER DIFFERENTIAL 355071 964060 940816 964030 355020 971060 355090 980212 355030 355080 971060 940816 355050 903312 355071 35 5012 CENTRAL DIFFERENTIAL - SET 90 3312 HEX SCREW SFH M3x12 (10) 35 5020 DIFFERENTIAL CASE 94 0816 HIGH-SPEED BALL-BEARING 8x16x5 BLUE COVERED (2) 35 5030 STEEL DIFF BEVEL &...
  • Page 9 CENTER DIFFERENTIAL ➌ ➋ Graphite Grease (HUDY #106210) 940816 Graphite Grease BB 8x16x5 (HUDY #106210) ➊ STEP DETAIL ➎ Use HUDY Ball-Bearing ➍ Grease or Oil for servicing: #106220 - Standard #106221 - Extra ➏ 964060 #106222 - Premium S 6x18x0.2 #106230 - Bearing Oil ➎...

  • Page 10: Front Transmission

    355114 940816 352005 940816 355003 FRONT DIFF 902312 35 2005 XB8 DIFF BULKHEAD BLOCK SET FRONT/REAR 35 5472 DRIVE SHAFT BOOT (2) 35 5003 XB8 FRONT/REAR DIFFERENTIAL 46T - SET 35 5114 BEVEL DRIVE GEAR 14T 90 1404 HEX SCREW SB M4x4 (10) 35 5236 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™...

  • Page 11: Rear Transmission

    35 5003 XB8 FRONT/REAR DIFFERENTIAL 46T - SET 35 5472 DRIVE SHAFT BOOT (2) 35 3096 XB8 GRAPHITE REAR SHOCK TOWER - CNC MACHINED 3.5MM 35 5114 BEVEL DRIVE GEAR 14T 90 1404 HEX SCREW SB M4x4 (10) 35 5236 CVD DRIVE SHAFT COUPLING - HUDY SPRING STEEL™...

  • Page 12: Rear Suspension

    XB8 COMPOSITE REAR MUD PROTECTOR (L+R) 90 2318 HEX SCREW SH M3x18 (10) 35 3317 XB8 ALU REAR LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER 90 3308 HEX SCREW SFH M3x8 (10)) 35 3325 XB8 ALU REAR LOWER SUSP. HOLDER - REAR - SQUARE ADJ. ROLL-CENTER 90 9372 SCREW PHILLIPS SS 3.5x22 (10)
  • Page 13 Outer position = 1mm or 1° from center 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 14 REAR SUSPENSION 1.5mm 901312 SB M3x12 Follow the TECH TIP on page 5 to install the pivot balls STEP DETAIL ➍ 901303 -2~0mm SB M3x3 901305 SB M3x5 ➍ 902318 ➋ SH M3x18 ➋ 903308 ➌ SFH M3x8 3x18 ➊ DETAIL Step ➊...
  • Page 15 COMPOSITE REAR BODY POST - LONG 35 5250 ALU WHEEL AXLE - BLACK COATED (2) 35 2234 XB8 ALU REAR HUB MOUNTING PLATE - SWISS 7075 T6 35 7331 XB808 REAR LOWER OUTER PIVOT PIN SCREW 3MM (2) 35 2633 ADJ.
  • Page 16 REAR SUSPENSION Follow the TECH TIP on page 5 Follow the TECH TIP on page 5 to install the pivot balls to install the pivot balls cAMBER LEFT LEFT THREAD THREAD RIGHT THREAD RIGHT THREAD DETAIL Use tools to tighten as shown NOTE ORIENTATION NOTE ORIENTATION Special Tool for all turnbuckles &...

  • Page 17: Front Suspension

    LOWER INNER PIVOT PIN F+R (2) 35 2005 DIFF BULKHEAD BLOCK SET FRONT/REAR 35 2117 XB8 COMPOSITE FRONT LOWER SUSPENSION ARM 90 1303 HEX SCREW SB M3x3 (10) 35 2323 ALU FRONT LOWER SUSP. HOLDER - FRONT - SQUARE ADJ. ROLL-CENTER - V2...
  • Page 18 Outer position = 1mm or 1° from center The new XRAY alu front lower suspension holders provide even greater range of adjustment for the front suspension. Using different combinations of eccentric bushings, fine adjustment of front kick-up, roll center, and front track-width can be obtained.
  • Page 19 FRONT SUSPENSION 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 ➍ ➋ 902318 SH M3x18 3x18 903308 ➌ SFH M3x8 ➊ DETAIL Step ➊...
  • Page 20 XB8 FRONT UPPER ARM BALL JOINT (L+R) 35 7254 COMPOSITE BALL CUP 13.9 MM (2) 35 2231 XB8 ALU STEERING KING PIN PLATE - SWISS 7075 T6 - L+R 14° 35 7256 ALU SHIM 6x13x1 (2) 35 2240 XB8 STEERING BLOCK 35 2623 ADJ.
  • Page 21 FRONT SUSPENSION Tighten composite hex nuts using HUDY tool #107581 pIVOT BAllS MUST MOVE FREElY During initial assembly, tighten each composite hex nut until the OPTION pivot ball starts to bind, then loosen slightly. Verify that the pivot #357253 Brass Adjusting Nut M15x1 balls move freely.

  • Page 22: Front & Rear Assembly

    351200 903412 903312 351108 903412 35 1108 XB8 ALU CHASSIS - SWISS 7075 T6 (3MM) - HARD COATED 90 2316 HEX SCREW SH M3x16 (10) 35 1200 FRONT & REAR BUMPER - V2 90 3312 HEX SCREW SFH M3x12 (10)
  • Page 23 FRONT & REAR ASSEMBLY INITIAL SETTING Add for extra stiffness (use from Last Aid Bag) 902316 SH M3x16 OPTION 3x16 #358088 Short Rear Brace TRAck TYpE REAR BRAcES FlAT MEDIUM JUMpS lARGE JUMpS long Brace Short Brace 903312 SFH M3x12 960030 N M3 Screw from the Last Aid Bag can be...
  • Page 24 COMPOSITE SQUARE ADJ. ROLL-CENTER BUSHINGS - V2 (2) 90 2314 HEX SCREW SH M3x14 (10) 35 2333 XB8 ALU FRONT UPPER ARM HOLDER - SWISS 7075 T6 (6MM) 90 3306 HEX SCREW SFH M3x6 (10) 35 2381 XB8 CASTER CLIPS (2)
  • Page 25 STEERING For servicing use step step step Bearing Oil (HUDY #106230) 902308 HUDY Tool Allen 3.0mm SH M3x8 940610 BB 6x10x3 970121 O 12.1x1.6 INITIAL PRELOAD SETTING 903410 SFH M4x10 NOTE ORIENTATION 4x10 SERVO SAVER 3x10 3x10 ASSEMBLED 3x14 VIEW 3x10 902310 SH M3x10...
  • Page 26 STEERING 902312 SH M3x12 2.0mm INITIAL POSITION 1.0mm 1.0mm NOTE All possible mounting ORIENTATION alternatives of eccentric bushings INITIAL SETTINGS DETAIL NOTE Composite eccentric bushings ORIENTATION Cutaway view Shock Tower CASTER LOWER SHIM (Behind arm) UPPER CLIP UPPER CLIP (Behind arm) Behind arm 24º...
  • Page 27 8. CENTER DIFF & BRAKE 902330 354041 901304 903308 902316 354058 354041 354010 354121 354130 354110 OPTION 902316 #354131 Glued Brake Pads Set-Ultra Efficient (4) 355012 CENTER DIFF 354010 903308 For improved brake efficiency and increased life time use the OPTION brake bads with springs. 903412 35 4010 CENTER DIFF MOUNTING PLATE - SET...
  • Page 28 CENTER DIFF & BRAKE 901304 SB M3x4 903308 SFH M3x8 NOTE ORIENTATION OF ALL PARTS 903308 SFH M3x8 NOTE ORIENTATION 903412 SFH M4x12 NOTE ORIENTATION Before inserting 3x30 long screws, loosen the four flat-head screws in the upper plate by 1/2 turn. Tighten all screws after assembly.
  • Page 29 HIGH TORQUE CLUTCH SPRINGS - HARD (3) (OPTION) 90 3310 HEX SCREW SFH M3x10 (10) 96 4075 WASHER S 7x10x0.5 (10) 35 8605 XB8 FUEL TANK 123CC WITH FLOATING FILTER 90 3314 HEX SCREW SFH M3x14 (10) 35 8680 FUEL TANK MOUNTING POST (2) 903310...
  • Page 30 911410 SHF M4x10 EXTREMELY IMPORTANT It is very important that your XB8 has properly-adjusted gear mesh. Adjust the gear mesh so there is adequate (or slightly larger) space between the spur gear and clutchbell teeth. Adjust the gear mesh by sliding the engine mounts in the slots of the chassis.
  • Page 31 FUEL TANK & ENGINE The fuel tank has the larger fuel volume and includes OPTIONAL tank inserts for decreasing the volume of the tank. Using the inserts allows you to adjust the volume of 3x16 fuel inside the tank; this works in conjunction with variables such as fuel filter capacity and/or length of fuel line to ensure you have the legal fuel volume limit for racing.

  • Page 32: Radio Case

    10. RADIO CASE 902310 902306 (not included) Servo Screw Personal transponder (not included) 356003 902312 (not included) 902314 356200 352460 302611 306310 356003 352670 902310 960030 902312 902314 Servo Grommet Receiver (not included) (not included) 902314 356003 356003 356003 Steering Servo Servo Grommet (not included) (not included)
  • Page 33 RADIO CASE Servo screw step 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 Use foam to cushion the 3x10 inside of the radio case so the receiver and battery...

  • Page 34: Shock Absorbers

    XB8 ALU SHOCK CAP NUT - BLACK COATED (2) 96 0026 NUT M2.5 - SHORT (10) 35 8054 XB8 ALU SHOCK CAP NUT WITH VENT HOLE - BLACK COATED (2) (OPTION) 97 0100 O-RING 10 x 1.5 (10) 35 8074...
  • Page 35 SHOCK ABSORBERS EXTREMELY IMPORTANT FRONT SHOCKS SHORT SHOCK ROD SHORT SHOCK BODY 970180 O 18x1.8 REAR SHOCKS LONG SHOCK ROD INCORRECT CORRECT LONG SHOCK BODY Do not push the shock rod straight Twist the shock rod through the through the lower shock body lower shock body assembly.
  • Page 36 SHOCK ABSORBERS FRONT SHOCK PRELOAD FRONT SHOCKS REAR SHOCKS SHORT FRONT SHOCKS LONG REAR SHOCKS REAR SHOCK PRELOAD SHORT SPRING LONG SPRING IMPORTANT! IMPORTANT! IMPORTANT! SpRING RATE Both front shocks Both rear shocks SHOck pRElOAD must be the same must be the same RIDE HEIGHT FRONT &...

  • Page 37: Final Assembly

    BODY CLIP (10) 35 3565 COMPOSITE REAR WING SHIM - BLACK (2) 35 9708 XRAY XB9 BODY FOR 1/8 OFF ROAD BUGGY - LOW DOWNFORCE 35 5261 WHEEL NUT - RIBBED - HARD COATED (2) 35 9809 WHEELS STARBURST - YELLOW (4) (OPTION)
  • Page 38 FINAL ASSEMBLY (SHORTER) (LONGER) 902318 REAR SHOCKS (LONG) M3x18 INITIAL SETTING NOTE ORIENTATION 902319 SH M3x18 LEFT thread STANDARD INITIAL SETTING M3x18 screw 960030 N M3 On the rear left arm use the SILVER M3x18 M3x18 screw - this screw has LEFT THREAD SHOck ABSORBERS Thread brake rods into plastic...
  • Page 39 FINAL ASSEMBLY DETAIL XRAY STARBURST wHEElS NOTE #359808 pink (OpTION) ORIENTATION #359809 Yellow (OpTION) 903312 SFH M3x12 960030 N M3 To tighten the setscrew you can also use the HUDY 17mm Wheel Nut Tool #107570 Apply air filter oil and follow the engine instructions to service the air filter.

  • Page 40: Throttle Linkage Adjustment

    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 41 MULTIFLEX™ XB8 offers revolutionary flex setting possibilities. Depending on the traction, surface, track layout, you can change the flex setting as you need. XB8 has 3 main Multi-Flex™ settings: soft, medium, stiff SOFT Use soft setting for low-traction, dusty tracks. The car will create a lot of traction with this setting but will have less steering and response compared to stiffer setting.
  • Page 42 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 43: Troubleshooting Guide

    clUTcH BEARINGS To prolong the lifespan of the clutch bearings, they must be regularly cleaned and lubricated (preferably after each run) using a high-quality grease such as HUDY Bearing Grease. However, after some time the clutch bearings must be replaced with new ones. HUDY #106230 REcOMMENDED pRODUcTS •...
  • Page 44 RC AMERICA, 2970 BLYSTONE LANE, SUITE 109, DALLAS, 75220 TEXAS, USA PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.com www.facebook.com/teamxray www.twitter.com/teamxray www.youtube.com/xrayracing Tube...

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