BEFORE YOU START This is a high-competition, high-quality RC 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 RC models with damaged wires. A damaged wire is extremely dangerous, and can cause short-circuits resulting in fire.
TOOLS REQUIRED Allen 1.5mm (#111545 - HUDY EXCLUSIVE Limited Edition) Combination Pliers (HUDY #189020) Allen 2.0mm (#112045 - HUDY EXCLUSIVE Limited Edition) Side Cutters (HUDY #189010) Allen 3.0mm (#113045 - HUDY EXCLUSIVE Limited Edition) Ball Allen 3.
BUILD TIPS & NOTES ▶ VIDEO TECH TIP Alexander Hagberg (Factory Driver) SAMPLE OF OPTIONAL PARTS When a QR CODE is found in the instruction manual, scan the code to be directed to an online video that explains that feature or adjustment in more detail. Make sure to watch all of the instructional videos to get the most performance out of your car.
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1. GEAR DIFFERENTIAL & FRONT SOLID AXLE If the diff is not turning freely after assembly, use thin sand paper to lightly polish the surface. NOTE ORIENTATION STEP ➍ DETAIL Use tweezers to insert pin. 964050 S 5x15x0.3 ➊ CUTAWAY VIEW ➍ 972050 O 5x2 ➋ 981210 ➌ P 2x10 ➎ INITIAL SETTING 5.000cSt #304932 GRAPHITE GEAR DIFF BEVEL & SATELLITE GEARS (2+4) 964031 S 3.5x10x0.2 Fill differential up to the top of the diff pin. DO NOT fill the diff to the top of the housing.
1. GEAR DIFFERENTIAL & FRONT SOLID AXLE After disassembling the gear diff, the large O-ring may have an increased size and may be more difficult to re-install. We recommend either inserting the old O-ring carefully in the diff cover, or installing a new O-ring if the old one cannot be made to fit properly. 971240 O 24x0.7 DETAIL 903258 SFH M2.5x8 ➊ ➌ ➋ ➍ NOTE ORIENTATION Tighten the screws equally but do NOT tighten them completely. BEARING OIL (HUDY #106230) Finish tightening in this order.
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2. FRONT & REAR SUSPENSION SUSPENSION ARMS NOTE ORIENTATION Install the pivot balls with Professional Multi Tool (HUDY #183011). NOTE ORIENTATION NOTE ORIENTATION Press straight NOTE ORIENTATION SUSPENSION ARMS 901310 SB M3x10 L=R LEFT = RIGHT DETAIL 4x8mm 901408 SB M4x8 5.0mm ▶ VIDEO TECH TIP 3x10mm 2.6mm Make sure to use 10mm set screw for rear arms. LOWER ARMS SUSPENSION ARMS NOTE ORIENTATION Install the pivot balls with Professional Multi Tool (HUDY #183011).
2. FRONT & REAR SUSPENSION SUSPENSION ARMS 901308 SB M3x8 L=R 901408 LEFT = RIGHT DETAIL 4x8mm SB M4x8 3.0mm 3x8mm 3.0mm Make sure to use 8mm set screw for front arms.
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3. CENTRAL TRANSMISSION NOTE ORIENTATION FOR ALL PARTS IMPORTANT All 4 bushings at one end of the car must be installed in the same orientation. 902308 SH M3x8 ▶ VIDEO TECH TIP Never use alu or titanium screws for the eccentric bushings. ALU CASTER BUSHINGS CASTER Never use alu or titanium screws for the eccentric bushings. CASTER ADJUSTMENT For most conditions, start with front caster set at 4.0°.
3. CENTRAL TRANSMISSION BELT TENSION ADJUSTMENT & DIFFERENTIAL POSITION L=R BELT TENSION ADJUSTMENT & DIFFERENTIAL POSITION L=R Rear diff UPPER position - tab in bottom notch provides more on-power steering, but makes the rear less stable. Rear diff LOWER position - tab in top notch provides more rear traction (mainly on-power), makes the car more stable in chicanes, but can cause a push on corner exit.
3. CENTRAL TRANSMISSION 303122-K NOTE ORIENTATION SHIM 3x6x1 OIL 303127-K BEARING OIL (HUDY #106230) This shim serves as the battery backstop. To move the battery further away from the center of the chassis, add additional shims. SHIM 3x6x4 4mm 4mm 303139-K SHIM 3x6x7 NOTE ORIENTATION 1mm 7mm OIL 903318 BEARING OIL (HUDY #106230) SFH M3x18 This shim serves as the battery backstop. To move the battery further away from the center of the chassis, add additional shims.
3. CENTRAL TRANSMISSION 903305 SFH M3x5 MOTOR MOUNT FLEX ADJUSTMENT The motor mount is part of the chassis flex adjustment. Adding or removing screws from the mount will create different flex settings for different tracks and traction levels. NOTE: When removing screws from the motor mount, the spur gear becomes more susceptible to breakage in crashes. ▶ VIDEO TECH TIP SOFT (INITIAL SETTING) Use only the 2 rearmost screws to attach the motor mount (as shown).
3. CENTRAL TRANSMISSION #303768 ALU CHASSIS T-BRACE - 7075 T6 #303767 BRASS CHASSIS T-BRACE - 10g 303121-K SHIM 3x6x0.5 Use only for STIFF setting 903305 0.5mm CHANNEL 0.5mm SHIM 0.5mm SFH M3x5 NOTE ORIENTATION DETAIL 0.5mm SHIM 903306 SFH M3x6 3x6mm 3x6mm 3x5mm Use only for STIFF setting 3x5mm CHASSIS FLEX ADJUSTMENT The brace provides chassis flex adjustment possibilities depending on which screws are connected.
3. CENTRAL TRANSMISSION NOTE ORIENTATION 903305 SFH M3x5 FRONT CROSS BRACE The cross brace reduces front chassis flex and improves steering response. Recommended for most conditions EXCEPT for higher-traction conditions or high-speed tracks where a smoother steering response is preferred. ▶ VIDEO TECH TIP CHASSIS & TOP DECKS 303125-K SHIM 3x6x3 3mm Do not tighten fully. 902314 SH M3x14 IMPORTANT Do not tighten the screw fully at first.
4. STEERING #301071 X4 GRAPHITE UPPER DECK 1.6mm 902305 #301072 X4 GRAPHITE UPPER DECK - SPLIT FRONT - 2.0mm #301073 X4 GRAPHITE UPPER DECK - SPLIT REAR - 2.0mm 902306 930306 301158 301158 301070 902305 303143 306219 303454 362652 372503 303210 362648 372503 302663 372503 902305 302544 940508 302517-K 902306 #302590 ALU DUAL SERVO SAVER SCREW M3x7 (2) 302552 302539 940508 303122-K 302663 903305 372649 302612 303137-K #302612-O ALU ADJ.
4. STEERING 2x STEERING LINKS SERVO LINK Adjust servo link to fit your servo. #302612-O ALU ADJ. TURNBUCKLE M3 L/R 39mm ORANGE - SWISS 7075 T6 (2) NOTE ORIENTATION Round ball joint on the long side. THREAD THREAD THREAD THREAD #302610 ADJ. TURNBUCKLE L/R 39mm HUDY SPRING STEEL (2) 2x L=R 26.3mm approx. 14.5mm #303138-K or 303138-O ALU SHIM 3x7x2.0mm (10) 303137-K 3x6mm SHIM 3x7.5x2 OIL 5x8x2.
4. STEERING 306219 SHIM 3x6x2 H = (24T) F = (25T) K = (23T) 10mm THREAD 4.9mm BALL 2mm 2mm 4mm THREAD 4.9mm BALL INITIAL SETTING ▶ VIDEO TECH TIP #302664 COMPOSITE BALL JOINT 4.9mm UNIDIRECTIONAL - OPEN (4) STEERING SYSTEM For more in-corner steering and better steering response, aluminum servo horns may be used.
4. STEERING TOP DECK FLEX SETTINGS The new feature of the top deck is the flex setting adjustment. There are three different flex setting alternatives. 301158 SCREW 3x5.5 SOFT SOFT-MEDIUM MEDIUM STIFF The top deck is connected to the motor mount via special 3x5.5mm screw in the rear, behind the layshaft. This setting eliminates a bit of steering but improves stability. The top deck is connected to the motor mount via special screws M3x5.5mm behind and in front of layshaft.
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5. FRONT & REAR SUSPENSION 2x REAR TRANSMISSION - CVD DRIVE SHAFT 2x FRONT TRANSMISSION - ECS DRIVE SHAFT 901302 SB M3x2.5 TL 305392 THREAD LOCK DO NOT OVERTIGHTEN P 2x10 TL GRAPHITE GREASE (HUDY #106210) GRAPHITE GREASE (HUDY #106210) 305394 P 2x9 THREAD LOCK 2x10mm 2x9mm DETAIL STEP Set-screw against the flat spot. ▶ VIDEO TECH TIP Set-screw against the flat spot. TL THREAD LOCK TIP For easy installation of the #305241 plastic caps, use pliers as shown.
5. FRONT & REAR SUSPENSION 2x L=R REAR TRANSMISSION 940611 BB 6x10x3 NOTE ORIENTATION Use Alu 54mm Drive Shafts in rear. 962061 S 6x7.5x1 Left UPRIGHT = Right UPRIGHT 968050 L=R C5 1mm OIL ▶ VIDEO TECH TIP OIL BEARING OIL (HUDY #106230) DETAIL STEP After inserting the driveshaft through the wheel hub, push both sided to ensure they are properly aligned. FRONT & REAR UPRIGHTS DETAIL STEP INSTALL the C-CLIP with Combination pliers Tool (HUDY #189020).
5. FRONT & REAR SUSPENSION L=R 2x FRONT TRANSMISSION 940611 BB 6x10x3 Use Steel 58mm ECS Drive Shafts in front. NOTE ORIENTATION 962061 S 6x7.5x1 Left UPRIGHT = Right UPRIGHT L=R 968050 C5 1mm OIL BEARING OIL (HUDY #106230) DETAIL STEP After inserting the driveshaft through the wheel hub, push both sided to ensure they are properly aligned. DETAIL STEP INSTALL the C-CLIP with Combination pliers Tool (HUDY #189020).
5. FRONT & REAR SUSPENSION 2x REAR TRANSMISSION 2x FRONT TRANSMISSION 902304 SH M3x4 ALU REAR ARS PLATE - SHORTER ALU STEERING PLATE - LONGER NOTE ORIENTATION WIDER NOTE ORIENTATION NARROWER #302394 STEERING PLATE FRONT +1mm (2) #302396 STEEL FRONT STEERING PLATE (2) #302395 STEEL REAR ARS PLATE (2) Use optional steel plates for increased durability. +1mm front steering arms are offered as an option, mainly recommended for high-traction carpet conditions such as black carpet.
5. FRONT & REAR SUSPENSION 2x REAR SUSPENSION #106213 HUDY JOINT GREASE 303121-K SHIM 3x6x0.5 0.5mm ▶ VIDEO TECH TIP Raising the rear axle height will free up the rear and improve rotation and off-power steering. Mainly recommended for mediumto high-traction asphalt surfaces. Minimum shim thickness is 0.5mm; do not use thinner. ROLL-CENTER 2x FRONT SUSPENSION #106213 HUDY JOINT GREASE 303121-K SHIM 3x6x0.5 0.
5. FRONT & REAR SUSPENSION 2x REAR LINKS 2x #303211-O ALU TURNBUCKLE L/R 30mm ORANGE - SWISS 7075 T6 (2) L=R THREAD 15.8mm THREAD 2x NOTE ORIENTATION REAR TRANSMISSION MORE SHIMS gives more toe-gain on compression. LESS SHIMS gives less toe-gain (or even toe loss), on suspension compression. 303123-K SHIM 3x6x2 NOTE ORIENTATION MORE TOE-GAIN improves rear grip and side bite. Mainly recommended for low- to medium-grip conditions.
5. FRONT & REAR SUSPENSION 4x 4x Install the pivot balls with Professional Multi Tool (HUDY #183011). 17mm 2.0 m m 4mm Thread 2x REAR TRANSMISSION REAR TRANSMISSION 901302 SB M3x2.5 DETAIL CENTER 3x4mm 901304 SB M3x4 3x2.5mm 3x4mm 3x2.5mm Set the bar into the center, remove the play in the bushings, and tighten the set-screws fully. SOFTER rear anti-roll bar: Generates more side traction. Mainly recommended for low-grip asphalt tracks.
5. FRONT & REAR SUSPENSION 2x FRONT ANTI-ROLL BAR FRONT ANTI-ROLL BAR DETAIL 901302 CENTER SB M3x2.5 901304 SB M3x4 3x4mm 3x2.5mm 3x2.5mm 3x4mm Set the bar into the center, remove the play in the bushings, and tighten the set-screws fully. ▶ VIDEO TECH TIP SOFTER front anti-roll bar: Allows the front to roll more which gives more front grip and improves on-power steering.
6. SHOCK ABSORBERS #104002 HUDY AIR VAC – VACUUM PUMP - ON-ROAD XRAY SPRINGS #308263 C = 2.3-2.6 OPTION #308264 C = 2.5-2.8 INCLUDED 308354-K 308092 (OPTION) OPTION #308275 C = 2.5 OPTION #308286 C = 2.6 OPTION #308276 C = 2.7 OPTION #308288 C = 2.8 OPTION #308277 C = 2.9 OPTION #308290 C = 3.0 OPTION 965023 308335 303241 #308274 C = 2.3 965023 308082 4 holes 308037 3 holes 1.1 1.2 1.3 308324 308364 1.1 1.2 1.
6. SHOCK ABSORBERS SHOCK OIL NOTE ORIENTATION 972030 O 3x2 SHOCK SHOCK OIL OIL SHOCK OIL CUTAWAY VIEW DETAIL ➊ 970131 ➋ SHOCK OIL O 13x1.0 Be careful not to cross-thread the collar on the shock body. Install the pivot balls with Professional Multi Tool (HUDY #183011). NOTE! Set this distance to 8.5mm when using PSS system in front shocks. DETAIL 9mm INITIAL SETTING INCORRECT DETAIL HINT: Pre-thread the ball joint using an M3 screw.
6. SHOCK ABSORBERS ➊ When installing the shock cap assembly on the shock body, some oil will leak out... this is normal. ➋ Tighten the cap and clean off any excess oil. ➌ After the shock is assembled, the shock rod will push itself out of the shock body fairly quickly. ➍ Follow the next procedure to adjust the rebound.
7. FRONT & REAR ASSEMBLY 902312 REAR BODY MOUNT SET #301336 301206 301219 902306 0mm INCLUDED #301337 +1mm OPTION #301338 +2mm OPTION 301231 308308-K FRONT BODY MOUNT SET #301322 0mm INCLUDED #301323 +1mm OPTION #301324 +2mm OPTION 902306 FRONT ECC. BODY MOUNT SET #301326 0mm INCLUDED #301327 +1mm OPTION 981212 301322 #301328 +2mm OPTION #301351-O ALU ADJUSTABLE BODY POST STOP (2) 301322 960030 981212 301325 301204 #301210 GRAPHITE UPPER HOLDER FOR BUMPER 2.
7. FRONT & REAR ASSEMBLY BODY POST ORIENTATION 903308 This new, innovative & unique feature allows adjustment of the body position for all kind of surfaces, traction conditions, touring classes, using only one body. There are two different body positions; rearward and center. Depending on the conditions the body post positions can be easily changed which allows the body to be moved.
7. FRONT & REAR ASSEMBLY 2x #301351-O ALU ADJUSTABLE BODY POST STOP (2) L=R 981212 P 2x12 Very handy, easily externally adjustable body post made from Swiss 7075 T6 aluminum. Allows for adjustment of body height by 3mm without needing to change the position on the body post. FRONT ECC.
7. FRONT & REAR ASSEMBLY 2x L=R REAR VERTICAL BODY MOUNTING (INITIAL SETTING) REAR HORIZONTAL BODY MOUNTING 902308 SH M3x8 903306 SFH M3x6 NOTE ORIENTATION The optional horizontal rear body mounting has proven beneficial for medium- to highgrip conditions, and especially on technical tracks. The horizontal mounting improves the direction change of the car, improves steering response, and improves rotation. However, rear grip is reduced.
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7. FINAL ASSEMBLY ALTERNATIVE 1 902306 ALTERNATIVE 2 FLOATING FORWARD MOUNT SERVO HOLDER FLOATING REARWARD MOUNT SERVO HOLDER (INITIAL SETTING) SH M3x6 903306 SFH M3x6 For improved weight balance and for more space for electronics, we recommend using a narrow, light servo.
7. FINAL ASSEMBLY #306410 ALU FAN MOUNT 902308 SH M3x8 (#901302) 3x2.
7. FINAL ASSEMBLY OPTIONAL WEIGHTS #309852 X4 BRASS WEIGHTS NICKEL COATED FOR MOTOR MOUNT 4g+4g+8g (8g) (4g) (4g) #306551 XRAY PURE TUNGSTEN CHASSIS WEIGHT 11g ▶ VIDEO TECH TIP WEIGHT BALANCE 901305 SB M3x5 To ensure correct functioning of the battery holder, do not overtighten the screw; the holder must be able to move. 902320 HEIGHT ADJUSTMENT 1 turn = 0.
7. FINAL ASSEMBLY #107870 HUDY FIBRE-REINFORCED TAPE #309861 SHORT LIPO BALANCING CHASSIS WEIGHT 40g (2) LiPo Battery Pack (NOT INCLUDED) 903312 SFH M3x12 #306199 GRAPHITE HOLDER FOR ADJ.
7. FINAL ASSEMBLY ALU REAR WING SHIM #353561 SILVER OPTION #293561 SILVER OPTION #293561-O ORANGE OPTION 960240 OFFSET ALU WHEEL SHIMS N M4 #305380 0.75mm OPTION #305382 0.5mm OPTION #305381 1.0mm OPTION Make sure the wheel nuts are very tight, so the wheels do not loosen during operation.
7. FINAL ASSEMBLY BODY STOP SYSTEM The X4 features an adjustable front body upstop system incorporated into the new upper arm to prevent the body shell from bottoming out and hitting the ground during cornering. When the system is set correctly, it allows the body to be run lower without dragging on the ground to improve aerodynamic efficiency.
SET-UP SHEET VER.01 ©XRAY FRONT & REAR FRONT CASTER RACE TRACK 5º NAME DATE TRACK QUAL TEMPERATURE POSITION FINAL POSITION 4º 3º Adjust with eccentric bushings REAR CASTER SUSPENSION BUMP STEER HEIGHT SHIM /mm /mm 0.5º 1.5º 2.5º 3.5º 4.5º 5.
199181 107905 108201 104002 108205 108203 199911 109800 107771 107865 181040 107702 107712 107714 181030 183000 181034 181110 107719 107715 293110 107713 107716 104002 106260 107090 107601 107643 107702 107712 107713 107714 107715 107716 107719 107880 293111 HUDY AIR VAC - VACUUM PUMP - ON-ROAD HUDY TIRE ADDITIVE - TIRE GRIPPER - 50ML - V2 HUDY BEARING CHECKING TOOL LIMITED EDITION - REAMER FOR BODY 0-9MM + COVER - SMALL LIMITED EDITION - ARM REAMER # 3.
107904 199270 106260 107855 199060 109880 107875 298100 107870 108150 183011 107090 107750 109840 107601 107643 177035 109305 175535 109360 109370 111545 132045 109860 112045 108190 /10 TOURING CARS /10 TOURING CARS - SILVER GREY /10 TOURING CARS - DARK GREY -UP SYSTEM FOR 1/10 TOURING CARS G SET-UP SYSTEM (4) 10 RUBBER TIRES (4) OAD DIFF & SHOCKS OFF-ROAD DIFF ASSEMBLY P SYSTEM SSORIES & PIT LED WRENCH # 1.5MM WRENCH # 2.
199295-H 199290-H 803053 803062 106261 106200 107861 107840 107761 105590 107846 106290 293080 293012 293011 293083 107761 107772 106210 106230 106200 106261 106350 107861 106290 107840 107846 105520 50 293082 HUDY ADJUSTABLE CAMBER GAUGE 80MM HUDY PROFESSIONAL 1/10 TC WHEEL ARCH MARKER + WHEEL ADAPTER & NUT HUDY GRAPHITE GREASE HUDY BEARING OIL HUDY MAGIC CLEANING GUM HUDY TIRE ADDITIVE - TIRE GRIPPER RED - 50ML HUDY PREMIUM SILICONE OIL 500 CST - 50ML HUDY PROFFESIONAL RACING STOPWATCH XL DISPL
199296-H 199280M-H 298015 105520 298012 298019 105500 107772 298016 298018 298014 181090 293311 293491~293493 293401~293403 293497~293499 293404~293406 293501~293503 293407~293409 293311 293403 293493 294023 294140 294156 298012 298013 298014 298015 298016 298017 298017 106310~106694 181091 GRAPHITE REAR WING SIDE PLATE 0.
RC AMERICA, 2030 Century Center Blvd #15, Irving, TX 75062, USA PHONE: 214-744-2400, FAX: 214-744-2401, xray@rcamerica.
