BEFORE YOU START The X12 is a high-competition, high-quality, 1/12 pan car intended for persons aged 16 years and older with previous experience building and operating RC model racing cars. This is not a toy; it is a precision racing model. This model racing car is not intended for use by beginners, inexperienced customers, or by children without direct supervision of a responsible, knowledgeable adult.
IMPORTANT NOTES – ELECTRICAL • Insulate any exposed electrical wiring (using heat shrink tubing or electrical tape) to prevent dangerous short circuits. Take maximum care in wiring, connecting and insulating cables. Make sure cables are always connected securely. Check connectors for if they become loose. And if so, reconnect them securely. Never use R/C models with damaged wires. A damaged wire is extremely dangerous, and can cause short-circuits resulting in fire.
SYMBOLS USED Part bags used Assemble in the specified order Assemble left and right sides the same way 05 Apply oil Pay attention here Assemble as many times as specified (here twice) Apply CA glue 2x L=R Apply grease Cut Ensure smooth non-binding movement CA Assembly view Follow Set-Up Book Pocket Hobby Knife (HUDY #188981) Turnbuckle 3mm (HUDY #181030) Reamer (HUDY #107600) or (HUDY #107601) Scissors (HUDY #188990) Turnbuckle 4mm (HUDY #181040) Tighten screw gently Detail view OIL
GRAPHITE PART PREPARATION PREPARE ALL GRAPHITE PARTS To protect and seal edges of graphite parts, sand edges smooth and then apply CA glue. Fine sandpaper Use fine sandpaper to sand smooth the edges of all graphite parts. CA Apply CA glue to all adges of the graphite parts.
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1. FRONT SUSPENSION 2x NOTE ORIENTATION STEEL BALL 7.2mm DETAIL 7.2mm NOTE ORIENTATION CAMBER 2x If the arm does not have enough play, remove the clips and thin the clips slightly with sandpaper. The arms must have free movement and not bind. 901304 SB M3x4 DETAIL Make sure that arm moves freely. Moves freely 1+0.5mm DETAIL 2mm CASTER 2x 303122-O SHIM 3x6x1 The thickness of shims changes the steering linkage angle.
1. FRONT SUSPENSION LOW traction & bumpy track The thickness of shims used affects the ride height of the car, so determine the proper amount of shimming based on tire diameter. 10K cSt (#106510 HUDY 50ml) 372290 S 3.2x4.8x0.5 HIGH traction & smooth track 30K cSt (#106530 HUDY 50ml) Moves freely use HUDY Silicone Oil 964032 OIL S 3.2x4.8x0.2 0.5mm 0.5mm 965019 RIDE HEIGHT ADJUSTMENT INITIAL SETTING above upper arm (0.5mm) above steering block (1.3mm) below steering block (0.2mm) 0.
1. FRONT SUSPENSION #371111 X12‘19 GRAPHITE CHASSIS 2.
1. FRONT SUSPENSION 2x 903306 SFH M3x6 NOTE ORIENTATION 2x UPPER ARM POSITION ADJUSTMENT SHIMS Tighten Gently 303121-O SHIM 3x6x0.5 901304 901304 The shims influence the camber gain change. SB M3x4 SB M3x4 MORE shims = less camber gain, reduced initial steering, reduced steering sensitivity (less twitchy). 3x8mm 3x10mm 373120-O 5.3x7.8x0.5mm Use same shim thickness on both left & right sides. SHIM 5.3x7.8x0.5 REACTIVE CASTER SETTING 3x6x0.5mm = 2.
1. FRONT SUSPENSION 2x NOTE ORIENTATION STEEL BALL 7.2mm DETAIL 7.2mm NOTE ORIENTATION CAMBER 2x 2x DETAIL Make sure that arm moves freely. 1+0.5mm 2mm DETAIL Moves freely Fully Tighten If the arm does not have enough play, remove the clips and thin the clips slightly with sandpaper. The arms must have free movement and not bind.
1. FRONT SUSPENSION 2x Marked "R" The thickness of shims changes the steering linkage angle. Thicker shims gives decreased in-corner steering, but car becomes easier to drive. 303122-O SHIM 3x6x1 3x6x1mm Use 3mm bump steer as INITIAL SETTING. 3x6x2mm 303123-O SHIM 3x6x2 Marked "L" 960031 ALU N M3 NOTE ORIENTATION DETAIL NOTE ORIENTATION ALU NUTS M3 #296530-B ALU BLUE OPTION #296530-K ALU BLACK OPTION #296530-O ALU ORANGE OPTION The flat of the nut must be PARALLEL to the lower arm.
3. REAR SUSPENSION ALU NUTS M3 SIDE SPRINGS #296530-B ALU BLUE OPTION #296530-K ALU BLACK OPTION #373584 C=0.6 SILVER OPTION 960031 #960031 ALU SILVER #373585 C=0.9 GOLD 902306 #296530-O ALU ORANGE OPTION INCLUDED 372650 372662 373550 #373587 C=1.5 SILVER OPTION 306219 378141 372650 INCLUDED #373586 C=1.2 BLACK OPTION #373588 C=1.
3. REAR SUSPENSION 902306 SH M3x6 NOTE ORIENTATION 903306 SFH M3x6 Lightly tighten the screws so there is no free play, but do not overtighten otherwise the pivotball will not move freely. 902306 DETAIL SH M3x6 Ensure free, smooth movement without excessive freeplay.
3. REAR SUSPENSION 2x Do not tighten fully, pivotballs must turn freely. 902258 SH M2.5x8 Do not tighten fully, pivotballs must turn freely. 2x Ensure free, smooth movement DETAIL 903306 SFH M3x6 TIGHTEN FULLY DETAIL POD Linkage position OUTER POSITION - the side link is straight, easier to drive INNER POSITION - the side link is angled, increased in-corner steering INITIAL SETTING 0.5mm 5.
3. REAR SUSPENSION Self-locking ALU nut M3 ALU NUTS M3 306219 3x6x1mm 3x6x1mm SHIM 3x6x1 #296530-B ALU BLUE OPTION #296530-K ALU BLACK OPTION #296530-O ALU ORANGE OPTION #960031 902306 ALU SILVER INCLUDED BLACK nut M3 SH M3x6 960031 ALU N M3 960032 N M3 2x 2x HUDY OILS 50ml Add oil in each slot of the COMPOSITE side tubes. NOTE: OIL Add oil only in the slots, not on the whole tube. After assembling the side tubes, check for smooth operation.
4. BALL DIFFERENTIAL 930138 960031 941438 963030 941438 930130 375051-O ALU NUTS M3 #296530-B ALU BLUE OPTION #296530-K ALU BLACK OPTION 375031 #296530-O ALU ORANGE OPTION #960031 ALU SILVER 941438 375080 INCLUDED 375896 375010 375080 375390 951438 #930230 XRAY CERAMIC BALL 3.175MM (12) 373041 375390 375090-O 372072 373041 303142-O 303143 #930230 CERAMIC BALL-BEARING AXIAL F3-8 3x8x3.
4. BALL DIFFERENTIAL 303142-O SHIM 3x5x0.5 303143 SHIM 3x5x0.25 375390 ALU SCH M3x8 #373042 ALU UPPER ECCENTRIC CLAMP The thickness of shims used affects the ride height of the car, so determine the proper amount of shimming based on tire diameter. NOTE ORIENTATION IMPORTANT: Always use the same thickness of shims on both left & right sides. A SHORTER car rotates harder in slow corners and has improved forward traction.
5. SHOCK ABSORBER SHOCK SPRINGS 378011 965015 378050-O #378092 C=1.5 SILVER OPTION #378093 C=1.8 GOLD INCLUDED #378094 C=2.1 BLACK OPTION #378095 C=1.4~1.9 BLACK OPTION #378096 C=2.0~2.5 BLACK 2 DOTS OPTION 378061 378080 378011 971022 378030-O HUDY SHOCK OILS - 100ml BAG 965015 C 1.
5. SHOCK ABSORBERS 971022 O 2x2 OIL Shock Oil OIL Shock Oil DEFAULT SHOCK SETTING FOR CENTER SHOCK ABSORBER Follow the steps below to set the shock. HALF TIGHTEN TIGHTEN FULLY 50% 100% Oil 700cSt 3~5x UP & DOWN ➐ 20 ➊ ➋ ➌ ➍ ➎ ➏ Extend the shock shaft completely. Fill the shock body with the shock oil. Move the shock shaft up and down a few times to release the air bubbles trapped beneath the piston.
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6. FINAL ASSEMBLY We recommend using a servo for 1/12 pan cars. NOTE ORIENTATION 306219 SHIM 3x6x1 3x6x1mm 903310 SFH M3x10 Do not use for basic set up. ACKERMANN SERVO SAVER Futaba Hitec KO Propo NOTE ORIENTATION Use the adapter that matches the steering servo. INITIAL SETTING Note the orientation of servo saver when servo is in neutral.
6. FINAL ASSEMBLY ALTERNATIVE 1 LONG SHOCK - FORWARD MOUNT POSITION 306219 ALTERNATIVE 2 SHORT SHOCK - REARWARD MOUNT POSITION (INITIAL SETTING) SHIM 3x6x2 3x6x2mm 3x6x2mm DETAIL 960032 N M3 "SHORT SHOCK" INITIAL SETTING "LONG SHOCK" BLACK nut M3 BLACK nut M3 The position of the servo depends on the weight of the electronics. If the car is heavier on the right, use a left-side servo position; if the car is heavier on the left, use a right-side servo position.
6. FINAL ASSEMBLY 2x 2x NOTE ORIENTATION 27.2mm Left thread 27.
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6. FINAL ASSEMBLY There are two alternative battery positions: CROSS-CHASSIS ALIGNMENT (INITIAL SETTING), or inline alignment. Positioning of electronics depends on the battery position. Receiver Wire (NOT INCLUDED) #376310 ANTENNA ROD (OPTION) See page 26 step 2 or page 27 step 1. DETAIL Receiver (NOT INCLUDED) After inserting the antenna rod, fully tighten both setscrews. Do not overtighten or you may strip the plastic.
6. FINAL ASSEMBLY LIPO BATTERY CONFIGURATION 2 INLINE ALIGNMENT: 903305 SFH M3x5 Inline battery alignment improves cornering speed and reduces the chance that the rear of the car will “diff out.“ Recommended for high-traction conditions.
RC AMERICA, 2030 Century Center Blvd #15, Irving, TX 75062, USA PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.
