Team Associated RC8B4.1 Nitro Off Road Competition Buggy Manual

Introduction

Thank you for purchasing this Team Associated product. This assembly manual contains instructions and tips for building and maintaining your new Kit. Please take a moment to read through this manual to help familiarize yourself with these steps.

We are continually changing and improving our designs; therefore, actual parts may appear slightly different than in the illustrations. New parts will be noted on supplementary sheets located in the appropriate parts bags. Check each bag for these sheets before you start to build.

KIT Features

Features in the RC8B4.1 Kit:

• New RC8B4.1 RWB chassis and side guards with tapered chassis design to increase stiffness and predictability
• New low CG and lightweight aluminum front and rear shock towers
• New shorter 16mm front and rear shock bodies for lower CG and lighter weight
• New 6-hole 1.4mm front and 1.5mm taper rear machined shock pistons included with emulsion shock cap seals
• New 3-hole rear suspension arms with updated rear anti-roll bar geometry for both smooth and bumpy tracks
• New durable rear hub design with wide footprint base, and tuneable 3mm carbon fiber hub towers
• New molded RC8B4.1 front bumper with optimized profile for bumpy transitions
• New blue aluminum front upper arm mount for added durability
• New 47T machined spur gear
• 13-44 Ring and Pinion Bevel Gear Set
• 92mm universal driveshafts with 17mm outdrives
• Updated Soft Blend suspension arms for maximum durability in cold weather
• New +1 aluminum steering block arms for sharper steering on low grip
• Innovative new pivot ball front suspension geometry improves steering balance / provides predictable handling in all conditions
• RC8B4 8° steering blocks are paired with a wider upper suspension arm pivot for increased stability and consistent steering through the entire steering throw
• RC8B4 gearboxes are included in the latest hard material used on RC8T4:
  • Front gearbox features a 3.5° inclined pinion gear angle to straighten the center driveshaft for increased drivetrain efficiency and reduced phasing and vibration
  • Both gearboxes feature large flanged bearings resulting in longer life of bearings and ring and pinion gears
• Latest version RC8B4 fuel tank with:
  • Flexible rubber lid puller
  • Updated spring for tight seal between lid and tank
• RC8B4 rear chassis brace has several design features and flex options:
  • Rear brace is mounted centrally to the gearbox, and has 2 two screw locations through the chassis to tune flex
  • Includes an optional molded "wing” insert for increased front-end downforce
  • Optional arm inserts mount to the top only
• RC8B4 front upper suspension arms, now in soft blend material
• RC8B4 front lower suspension arms, now in soft blend material
• RC8B4 rear wing mount has adjustable wing angle shims, significant strength improvements, an aerodynamic shape, and extra clearance for shock position adjustment
  • Two wing height options on the rear shock tower.

Additional Items Needed

Your new RC8B4.1 Kit comes as a kit. There are some items you will need to complete your kit (refer to website for suggestions):

• 4.8-7.4v receiver battery (Flat style NiMH, Flat style LiPo, Flat style LiFe)
• 2 or 3 channel radio/transmitter set with switch (2.4GHz recommended)
• Model car fuel (20-30% nitro recommended)
• .21 class rear exhaust engine
• 1:8 scale buggy wheels / tires
• Polycarbonate-specific paint
• CA (cyanoacrylic) glue - (#1597)
• Throttle and Steering servos
• Needle-nose pliers
• Transmitter batteries
• Starter box - (#1751)
• Glow igniter - (#27377)
• Exhaust system
• Fuel bottle - (#1747)
• Ride height gauge
• Hobby knife
• Reamer / hole punch
• Thread-locking compound - (#1596)

Other Helpful Items

• Silicone Shock/Diff Fluids (Refer to website for complete listings)
• Shock Pliers
• Reamer / Hole Punch - (#1499)
• Body Scissors (AE #1737)
• FT Hex Wrenches - (#1518)
• FT Nut Drivers - (#1519)
• Wire Cutters
• Calipers or a Precision Ruler

Hardware - 1:1 Scale View

Flat Head (fhcs)

• 2.5x6mm (4675)
• 2.5x8mm (31448)
• 3x5mm (31540)
• 3x6mm (31541)
• 3x8mm (25201)
• 3x10mm (25202)
• 3x12mm (25203)
• 3x14mm (89208)
• 3x30mm (89212)
• 4x10mm (81262)
• 4x12mm (89214)
• 4x14mm (89217)
• 4x16mm (81263)
• 4x20mm (81264)

Button Head (bhcs)

• 2.5x6mm (31520)
• 2.5x8mm (31521)
• 2.5x18mm (81259)
• 3x6mm (31531)
• 3x8mm (31532)
• 3x10mm (25211)
• 3x12mm (89202)
• 3x14mm (25187)
• 3x16mm (89203)
• 3x18mm (2308)
• 3x20mm (25188)
• 3x22mm (25189)
• 3x24mm (89204)
• 4x14mm (81260)
• 4x16mm (81261)

Set Screws

• 3x3mm (25225)
• 3x6mm (81257)
• 3x10mm (4671)
• 3x12mm (81258)
• 4x4mm (7732)
• 5x4mm (89221)

Ball Bearings

• 5x8x2.5mm (8680)
• 5x10x4mm (91560)
• 6x10mm (31404)
• 6x13x5mm flanged (91559)
• 8x16x5mm (91564)
• 8x16x5mm flanged (91565)

Socket Head (shcs)

• 2x5mm (31511)
• 2x16mm (7184)
• 3x10mm (25620)
• 3x12mm (89454)
• 3x24mm (89225)
• 3x26mm (89226)
• 3x28mm (89227)

LP Socket Head (lp shcs)

• 3x6mm (41089)
• 3x10mm (41090)
• 3x14mm (41094)
• 3x16mm (41093)
• 3x20mm (41091)

Nuts (lock/plain)

• M3 Nut (91477)
• M3 Alum. Locknut, Blue (31550)
• M3 Locknut, Black (25215)
• M3 Locknut w/Flange (25612)
• FT 3mm Locknuts, Blue(25392)
• FT M4 Locknut, Blue (31551)
• M4 Locknut, Serrated (91738)

Table of Contents

1. Cover
2. Introduction
3. 1:1 Hardware "Fold Out"
4. Table of Contents
5. Differentials Build (Bags 1.1, 1.2)
6. Shocks Build (Bag 2.1)
7. Turnbuckles Build (Bags 3.1, 3.2)
8. Steering / Chassis Build (Bag 4.1)
9. Front Gearbox Build (Bags 5.1, 5.2, 5.3)
10. Steering Blocks Build (Bags 6.1, 6.2)
11. Rear End Build (Bags 7.1, 7.2, 7.3)
12. Rear Hubs Build (Bags 8.1, 8.2)
13. Center Bulkhead Build (Bag 9.1)
14. Linkages Build (Bag 10.1)
15. Radio Tray Build (Bag 11.1)
16. Clutch / Filter Build (Bags 12.1, 12.2)
17. Fuel Tank Build (Bags 13.1, 13.2)
18. Wheels / Tires / Body (Misc.)
19. Droop Settings
20. Back Cover

Notes

! This symbol indicates a special note or instruction in the manual.

? This symbol indicates a specific build order in the manual.

? This symbol indicates a Racers Tip.

There is a 1:1 hardware foldout page in the front of the manual. To check the size of a part, line up your hardware with the correct drawing until you find the exact size. Each part in the foldout has a number assigned to it for ordering replacement parts.

Differential Build (Front and Rear) - Bag 1.1, 1.2 - Step 1

Parts: 81385 Outdrive O-Ring (5.8x1.9mm), 81379 Diff Case, 91564 8x16x5 Bearing, 81381 Diff Shim (6x8x0.20mm), 81012 17mm Outdrive, 81383 Pin (2.5x12mm), 81383 Diff Sun Gear (18T, LTC).

Instructions:

• Center Diff HTC Gearset is bagged separately. DO NOT MIX!
• Save 13.5 shims until install into gearbox.
• Align pin with groove in sun gear.

Differential Build (Front and Rear) - Bag 1.1, 1.2 - Step 2

Parts: 813834 Diff Shim (3.6x12x0.12mm), 81383 Diff Crosspin, 81383 Diff Planet Gear (10T, LTC), 81468 Diff Ring Gear (44/13 Set), 81385 Outdrive O-Ring (5.8x1.9mm), 81381 Diff Shim (6x8x0.20mm), 91564 8x16x5 Bearing, 81012 17mm Outdrive.

Instructions:

• Use black grease (#6588) to coat the back side of the diff gasket (i.e. not the entire gasket) before installation!

Differential Build (Front and Rear) - Bag 1.1, 1.2 - Step 3

Parts: 81380 Pin (2.5x12mm), 81383 Diff Sun Gear (18T, LTC), 81384 Diff Gasket, 91564 8x16x5 Bearing, 81012 17mm Outdrive.

Instructions:

• Align pin with groove in sun gear.
• Racer's Tip: Use black grease (#6588) to coat the back side of the diff gasket (i.e. not the entire gasket) before installation!

Differential Build (Front and Rear) - Bag 1.1, 1.2 - Step 4

Parts: 25202 M3x10mm FHCS.

Instructions:

• Racer's Tip: Fill diff above the cross pins, below the planet gears as shown.
• Front Diff Fluid: 15,000cst #5447
• Rear Diff Fluid: 10,000cst #5455

Differential Build (Center) - Bag 1.1, 1.2 - Step 5

Parts: 81379 Diff Case, 81385 Outdrive O-Ring (5.8x1.9mm), 91564 8x16x5 Bearing, 81381 Diff Shim (6x8x0.20mm), 81012 17mm Outdrive, Center Diff, 81380 Pin (2.5x12mm), 81383 Diff Sun Gear (20T, LTC).

Instructions:

• Use HTC Gearset for center differential!
• Align pin with groove in sun gear.

Differential Build (Center) - Bag 1.1, 1.2 - Step 6

Parts: 81380 Diff Crosspin, 81380 Diff Planet Gear (10T, HTC), 81380 Diff Sun Gear (20T, HTC), 81385 Outdrive O-Ring (5.8x1.9mm), 81596 Spur Gear (47T), 91564 8x16x5 Bearing, 81381 Diff Shim (6x8x0.20mm), 81012 17mm Outdrive, Center Diff.

Differential Build (Center) - Bag 1.1, 1.2 - Step 7

Parts: 81380 Pin (2.5x12mm), 81383 Diff Sun Gear (20T, HTC), 81384 Diff Gasket.

Instructions:

• Align pin with groove in sun gear.
• Racer's Tip: Use black grease (#6588) to coat the back side of the diff gasket (i.e. not the entire gasket) before installation!

Differential Build (Center) - Bag 1.1, 1.2 - Step 8

Instructions:

• Racer's Tip: Fill diff above the cross pins, below the planet gears as shown.
• Center Diff Fluid: 10,000cst #5455

Shocks Build - Bag 2.1 - Step 1

Parts: 81597 FT Shock Piston (6x1.4 flat) Front, 89215 2.5mm Shock Piston Locknut, 81598 FT Shock Piston (6x1.5 tapered) Rear, 81162 Shock Body (26.5mm) Front, 81163 Shock Body (36.5mm) Rear, 81172 TiN Shock Shaft (3.5x33.5mm) Front, 81185 O-Ring Hat Bushing (Front), 81186 Shock O-Ring, 81173 TiN Shock Shaft (3.5x42.5mm) Rear, 81188 Shock Body Seal Retainer, 81185 O-Ring Spacer.

Instructions:

• Install pistons taper down.

Shocks Build - Bag 2.1 - Step 2

Parts: 81512 Shock Cap Insert, 81452 RC8B3.2 Shock Cap, 91492 M2x4mm BHCS, 81190 Shock Boots, 81621 Shock Rod End, Front: 0, Rear: +4, 81562 Rod End Ball, 91492 Gasket, 81184 Emulsion Seal.

Instructions:

• Racer's Tip: Use green slime (#1105) to lube the o-rings before installation!
• When installing the emulsion seal, make sure it is correctly seated within the shock cap as shown.

Shocks Build - Bag 2.1 - Step 3

Instructions:

• Fill to top of shock body.
• Front Shock Fluid: 45wt #5430
• Rear Shock Fluid: 30wt #5422
• Tighten to snug, may be a small gap when sealed.
• Pro Tip: Tune the front fluid 40wt or 35wt in lower grip conditions.
• Bleed Procedure: Remove bleeder screw. Tilt shock so bleed hole is the highest point and slowly compress the shaft. Stop about 3mm from full compression, install the screw, and check that the shock is not pressurized. If so, bleed out a small amount more.

Shocks Build - Bag 2.1 - Step 4

Parts: 81221 Spring Collar O-Ring (20mm), 81221 Spring Collar (20mm), 81223 V2 Front Spring (White, 5.10lb/in, L70, 9.25T, 1.6D), 81233 V2 Rear Spring (Pink, 3.70lb/in, L86, 12.00T, 1.6D), 81512 Spring Cup, 25211 M3x10mm BHCS.

Instructions:

• The springs come with a colored marking pre-installed for easy identification.

Turnbuckles Build - Bag 3.1 - Step 1

Parts: 1401 33mm Turnbuckle, 91521 Ball Cup.

Instructions:

• Set aside until page 22.

Turnbuckles Build - Bag 3.1 - Step 2

Parts: 81521 Rod End (4mm, Offset), 89526 4mm Turnbuckle, 81562 Turnbuckle Ball, Shouldered, 81521 Rod End (4mm).

Instructions:

• Note the direction of turnbuckle ball.
• Set aside until page 15.

Left Turnbuckle

Right Turnbuckle

Turnbuckles Build - Bag 3.1 - Step 3

Parts: 81562 Turnbuckle Ball, Shouldered, 89299 Steel Turnbuckle (5x44mm), 81521 Rod End (5mm), 81562 Turnbuckle Ball, 81521 Rod End (5mm, Offset).

Instructions:

• Set aside until page 19.

Left Turnbuckle

Right Turnbuckle

Steering / Chassis Build - Bag 4.1 - Step 1

Parts: 81631 B4.1 Side Guards, 31540 M3x5mm FHCS, 25201 M3x8mm FHCS, 81629 RC8B4.1 Chassis RWB, 81091 Steering Post.

Instructions:

• Loosely attach 3x5mm FHCS and then install 3x8mm FHCS. Tighten after all screws are installed.
• Use thread lock (#1596).
• Use M4x10mm FHCS (81262).
• Use thread lock (#1596) (not included).

Steering / Chassis Build - Bag 4.1 - Step 2

Parts: 81084 Servo Saver Tube, 81562 Steering Link Pivot Ball, 89202 M3x12mm BHCS, 81516 Steering Bellcrank, 81083 Servo Saver Spring, 81516 Servo Saver Arm, 81084 Servo Saver Tube Spring Nut & O-Ring, 81084 Servo Saver Tube Shim.

Instructions:

• Racer's Tip: Use black grease (#6588) to lube the bellcrank halves before installation!
• Use thread lock (#1596).

Steering / Chassis Build - Bag 4.1 - Step 3

Parts: 31404 6x10x3mm Bearing, 8680 5x8x2.5mm Bearing, 81516 Steering Bellcrank.

Steering / Chassis Build - Bag 4.1 - Step 4

Parts: 25201 3x8mm FHCS, 81518 Steering Rack, #1596 thread lock, 81517 Steering Bellcrank Nut.

Instructions:

• 3mm hex wrench fits bellcrank nut hex.

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 1

Parts: 81510 Gearbox (Inboard), 89221 5x4mm Set Screw, 81468 Diff Pinion Gear (44/13 set), 81510 Dust Cap, 4675 2.5x6mm FHCS, #1596 thread lock, 81564 Dogbone Outdrive, Front, 91559 6x13x5mm Flanged Bearing.

Instructions:

• Racer's Tip: De-grease and clean set screw and cup for best thread lock.

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 2

Parts: 81381 Diff Shim (13.5x15.8x0.20mm), 25620 M3x10mm SHCS, #6588 black grease, 81510 Anti-Roll Bar Cap, 81510 Gearbox (Outboard).

Instructions:

• Step 1: Add shims on the ring gear side to TIGHTEN gear mesh. Subtract shims on this side to LOOSEN gear mesh. NOTE: Start 1x Thick 0.2mm.
• Step 2: Add or subtract shims here to finalize diff side to side play once gear mesh is set from Step 1. Recommended diff "side-to-side" clearance (gearbox assembly) 0.10 -0.25mm. Start with 1 x 0.1 mm.
• Note: 0.1 mm shim can be used for fine tuning of gear mesh.

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 3

Parts: 81520 Arm Mount Insert, Center, 81567 Arm Mount B, 81566 Arm Mount A, 81446 Suspension Arm Shim, 81260 M4x14mm BHCS, 81641 Hinge Pin, 89317 Droop Screw, 81636 Front Lower Arm, Soft.

Instructions:

• Kit Setup: Droop Screw: 1.5mm.
• Start here, adjust to 101 mm shock length.
• Build left and right side!

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 4

Parts: 81512 Anti-Roll Bar Link, 81585 Anti-Roll Bar Pivot, 81562 Rod End Ball.

Instructions:

• Note direction.

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 5

Parts: 81129 (Front) Anti-Roll Bar (2.2mm), 81585 Anti-Roll Bar Collet, 25225 3x3mm Set Screw, 89203 M3x16mm BHCS.

Instructions:

• Center the anti-roll bar collet on the anti-roll bar, then tighten the 3x3mm set screw.
• Front anti-roll bar gap: 2.0mm.
• Center!
• Note direction.

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 6

Parts: 31521 M2.5x8mm BHCS, 81257 M3x6mm Set Screw, 25225 M3x3mm Set Screw, 89214 M4x12mm FHCS, 89216 M4 Locknut, 81524 Body Post, Front, 81522 Top Plate, 31532 M3x8mm BHCS, 81525 Chassis Brace, Front.

Instructions:

• Tighten 3x6mm set screws just enough to still allow the anti-roll bar to move freely.

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 7

Parts: 31541 M3x6mm FHCS, 89214 M4x12mm FHCS, #1596 thread lock, 81520 Arm Mount Insert, Center, 81647 B4.1 Upper Link Mount, Angled.

Instructions:

• Kit Setup:

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 8

Parts: 81508 Shock Bushing, Front, 89226 M3x26mm SHCS, #1596 thread lock, 81632 B4.1 Front Shock Tower (26.5mm), 81520 Arm Mount Insert, Side.

Instructions:

• Kit Setup:
• Install arm mount inserts in direction shown!

Front Gearbox Build - Bag 5.1, 5.2, 5.3 - Step 9

Parts: 31521 M2.5x8mm BHCS, 81637 Front Upper Suspension Arm Wing, 81637 Front Upper Arm, Soft, 89214 M4x12mm FHCS, 81446 Caster Clip, 81446 Caster Clip (1.0mm), 81641 B4.1 Hinge Pin (48mm), 81533 Front Upper Suspension Arm Bushing.

Instructions:

• Build left and right side!
• Add 1.0mm caster clip behind suspension arm. Adjust final arm spacing by adding remaining clips in front of arm until fit is tight and the arm rotates freely.

Steering Blocks Build - Bag 6.1 - Step 1

Parts: 91565 8x16x5mm Bearing, Flanged, 81446 Caster Clip, 81641 B4.1 Hinge Pin, 48mm, #1597 ca glue, 81533 Front Upper Suspension Arm Bushing, 89221 M5x4mm Set Screw, 81469 FT Universal (92mm), 81514 Steering Block.

Instructions:

• Build left and right side!

Steering Blocks Build - Bag 6.1 - Step 2

Parts: 89096 Wheel Hex Pin, 81081 Wheel Hex (+0mm), 81514 Pillow Ball Cap, 81070 Pillow Ball Nut, Aluminum, 25202 M3x10mm FHCS, 81640 Steering Block Arm (+1 deg), #1596 thread lock.

Instructions:

• Build left and right side!
• Tighten pillow ball nut until pillow ball begins to bind, then loosen until pillow ball moves freely.

Steering Blocks Build - Bag 6.1 - Step 3

Parts: 81056 Suspension Arm Endcap, 81072 Pillow Ball Shim (1.4mm), Pillow Ball Shims (0.35mm, 0.7mm, 1.4mm), 81072 Pillow Ball Shim (0.7mm).

Steering Blocks Build - Bag 6.1 - Step 4

Parts: 81262 M4x10mm FHCS, #1596 thread lock, 89216 M4 Locknut, 31532 M3x8mm BHCS, 81643 B4.1 Front Bumper, 89214 M4x12mm FHCS, 81264 M4x20mm FHCS, 89217 M4x14mm FHCS.

Instructions:

• For attaching steering link to steering rack.
• Kit Setup: TOP

Steering Blocks Build - Bag 6.1 - Step 5

Parts: 25612 M3 Locknut W/ Flange, 81509 Shock Pin, 81257 M3x6mm Set Screw.

Instructions:

• Kit Setup: Mount the front shock in the outside hole on the front arm.
• A B

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 1

Parts: 81543 Gearbox (Inboard), 81565 Dogbone Outdrive, Rear, #1596 thread lock, 81468 Diff Pinion Gear (44/13 set), 81543 Dust Cap, 4675 M2.5x6mm FHCS, 89221 M5x4mm Set Screw, 91559 6x13x5mm Bearing.

Instructions:

• Racer's Tip: Use black grease (#6588) to lube the diff pinion before installation!
• Racer's Tip: De-grease and clean set screw and cup for best thread lock.

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 2

Parts: 81381 Diff Shim (13.5x15.8x0.20mm), 25620 M3x10mm SHCS, 81543 Gearbox (Outboard), #6588 black grease, 81543 Anti-Roll Bar Cap.

Instructions:

• Step 1: Add shims on the ring gear side to TIGHTEN gear mesh. Subtract shims on this side to LOOSEN gear mesh. NOTE: Start 1x Thick 0.2mm.
• Step 2: Add or subtract shims here to finalize diff side to side play once gear mesh is set from Step 1. Recommended diff "side-to-side" clearance (gearbox assembly) 0.10 -0.25mm. Start with 1 x 0.1 mm.
• Note: 0.1 mm shim can be used for fine tuning of gear mesh.

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 3

Parts: 81454 Arm Mount, HRC, Narrow (C), 81260 M4x14mm BHCS, 81520 Arm Mount Insert, Center.

Instructions:

• Kit Setup:

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 4

Parts: 81260 M4x14mm BHCS, 81641 Hinge Pin, 81512 Anti-Roll Bar Link, 81585 Anti-Roll Bar Pivot, 81638 B4.1 Rear Suspension Arm, soft, 89317 Droop Screw, 81455 Arm Mount, HRC, Narrow (D), 81520 Arm Mount Insert, Center, 81446 Suspension Arm Shim, 81648 PivotBall, Offset.

Instructions:

• Kit Setup: Droop Screw: 1.5mm.
• Kit Setup:
• Build left and right side!

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 5

Parts: 81140 (Rear) Anti-Roll Bar (2.5mm), 25188 M3x20mm BHCS, 25225 3x3mm Set Screw, 81150 Anti-Roll Bar Collet.

Instructions:

• Rear Anti-Roll Bar Tuning: Ball wide - more rigid, less rotation (*kit). Ball narrow - more soft, more rotation.
• Center!

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 6

Parts: 31521 M2.5x8mm BHCS, 25225 M3x3mm Set Screw, 81257 M3x6mm Set Screw.

Instructions:

• Pivot ball wide - flush (*kit). Pivot ball narrow 4mm.
• Tighten 3x6mm set screws just enough to still allow the anti-roll bar to move freely.

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 7

Parts: 31532 M3x8mm BHCS, 81525 Chassis Brace Insert, 25189 M3x22mm BHCS, 81525 Chassis Brace Mount, 81525 Chassis Brace (Rear), 81525 Rear Chassis Brace Insert, 25612 M3 Locknut W/Flange, 89214 M4x12mm FHCS.

Instructions:

• Racer's Tip: Tune the rear end for more flex with #81562 ball end insert here.

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 8

Parts: 81508 Shock Bushing, 81524 Body Post (Rear), 81558 Body Post Grommet, 81524 Body Post Mount (Rear), 41090 M3x10mm LP SHCS, 89208 M3x14mm FHCS, 81553 Wing Buttons, 81553 #1596 thread lock, 89227 M3x28mm SHCS, 81634 Wing (Black), B4.1 Rear Shock Tower (Aluminum, 36.5), 81552 Wing Angle Shim (-2), 81552 Wing Mount.

Instructions:

• Kit Setup:
• CHOOSE ONE: Fin adds straight-line stabilization. Button adds agility in corners.
• Racer's Tip: Center servos before horn installation!

Rear End Build - Bag 7.1, 7.2, 7.3 - Step 9

Parts: 89454 M3x12mm SHCS, 81552 Wing Mount Adapter, 25215 M3 Locknut, 89214 M4x12mm FHCS, 89208 M3x14mm FHCS, 25215 M3 Locknut.

Instructions:

• Refer to previous step (8) for wing height position.

Rear Hubs Build - Bag 8.1, 8.2 - Step 1

Parts: 81649 B4.1 Rear Hub Plates (standard), 81257 3x6mm Set Screw, 89096 Wheel Hex Pin, #1596 thread lock, 25188 M3x20mm BHCS, 25215 M3 Locknut, 81642 B4.1 Rear Hubs, 91564 8x16x5mm Bearing.

Instructions:

• Build two!
• Tighten set screw before camber link installation.
• Racer's Tip: Use a 2mm drill to punch thru the thin wall between set screws and the hinge pin. Tighten after installation to remove slop.

Rear Hubs Build - Bag 8.1, 8.2 - Step 2

Parts: 81081 Wheel Hex (+0mm), 89221 5x4mm Set Screw, 81642 B4.1 Rear Hub Shim (1mm), 81076 Hub Hinge Pin, 25612 M3 Locknut w/Flange, 25192 M3x20mm SHCS.

Instructions:

• Install left and right side!

Rear Hubs Build - Bag 8.1, 8.2 - Step 3

Parts: 89216 M4 Locknut, 25612 M3 Locknut w/Flange, 89214 M4x12mm FHCS, 81264 M4x20mm FHCS, 89217 M4x14mm FHCS, 25612 M3 Locknut W/ Flange, 81509 Shock Pin, 81257 M3x6mm Set Screw.

Instructions:

• Tuning Tip: Remove screw A for "soft/short" flex configuration.
• Kit Setup: Mount the rear shock in the outside hole on the rear arm.
• A B C

Center Bulkhead - Bag 9.1 - Step 1

Parts: 81448 Center Bulkhead (Lower), 81256 C-Clip (5mm), 81448 Rotor, 31448 M2.5x8mm FHCS, 89214 M4x12mm FHCS, 81043 Center Top Plate, 81040 Brake Cam, #1596 thread lock, 81042 Brake Lever.

Instructions:

• Center brake levers between the brake cams.

Center Bulkhead - Bag 9.1 - Step 2

Parts: 4671 M3x10mm Set Screw (front), 25225 M3x3mm Set Screw (rear).

Center Bulkhead - Bag 9.1 - Step 3

Parts: 81448 Center Bulkhead (Upper), 89149 Brake Bolt, 81038 Brake Pad Spring, 31532 M3x8mm BHCS, 81551 Brake Pad (Inside), 81551 Brake Pad (Outside).

Instructions:

• Align slotted holes on the same side when installing brake pads.
• Build Front and Rear.
• The upper center bulkheads have "F" for front and "R" for rear.

Center Bulkhead - Bag 9.1 - Step 4

Parts: 81550 Brake Rotor, 89212 M3x30mm FHCS, 81581 Center Dog Bone (104mm), 81580 Center Dog Bone (93.5mm).

Instructions:

• Note direction of center diff.

Linkages Build - Bag 10.1 - Step 1

Parts: 7184 M2x16mm SHCS, 81555 Servo Horn Pivot, 81555 Pivot Bushing (Brake), 81556 Servo Horn (Throttle), 81251 M2x10mm SHCS, 81251 Washer, 81555 Pivot Bushing (Servo Horn, Throttle), #1596 thread lock, 81555 Throttle Link, 81555 Throttle Spring, 81555 Set Collar, 81555 Throttle Ball Cup, 81556 Brake Servo Horn, 81555 Brake Link, 81555 Brake Bias Collar, 25225 M3x3mm Set Screw.

Instructions:

• Spline Count: Printed here 23T, 25T.

Linkages Build - Bag 10.1 - Step 2

Parts: 25225 M3x3mm Set Screw, 81555 Set Collar, #1596 thread lock, 81555 Brake Spring, 81555 Brake Linkage Spring Ball.

Instructions:

• Recommended Starting Positions: Front Brake Gap 7.75mm. Rear Brake Gap 4.5mm.
• Install Brake Links so they are flush with the back of the servo horn pivots.

Linkages Build - Bag 10.1 - Step 3

Parts: 25215 M3 Locknut, 81556 Servo Horn (Steering), 81556 Servo Horn Insert, 91048 HD Ball Stud (8mm).

Instructions:

• Spline Count: Printed here 23T, 25T.

Radio Tray Build - Bag 11.1 - Step 1

Instructions:

• Radio Tray Configuration: The radio tray on RC8B4 can be configured in four different ways. Each configuration changes the amount and location of flex in the chassis. Experiment with different configurations when running on different surfaces.
• When removing either graphite radio tray brace or transponder mount, utilize included plastic shims to maintain proper servo height.
• Option 1 (Least Flex - Kit Setup), Option 2 (Most Flex), Option 3 (More Rearward Flex), Option 4 (More Frontward Flex).

Radio Tray Build - Bag 11.1 - Step 2

Parts: 31448 2.5x8mm FHCS, 81592 FT Radio Brace (RWB), 81450 Transponder Mount, 81432 Battery Box (Bottom), 81433 Radio Tray Post, 41094 3x14mm LP SHCS, 41094 3x14mm LP SHCS, 25201 3x8mm FHCS.

Instructions:

• Servo not included!
• Servo not included!

Radio Tray Build - Bag 11.1 - Step 3

Parts: 42007 Receiver Box Grommet, 42007 Grommet Plug, 6727 Servo Tape, 31448 2.5x8mm FHCS, 81432 Receiver Box (Top), 81432 Battery Box (Top).

Instructions:

• Receiver Battery not included!
• Receiver not included!

Radio Tray Build - Bag 11.1 - Step 4

Parts: 25225 3x3mm Set Screw, 25211 3x10mm BHCS, 6338 Antenna Tube and Cap, 25215 M3 Locknut, 81432 Receiver Box (Top), 25211 3x10mm FHCS, #1596 thread lock, 89214 4x12mm FHCS.

Instructions:

• On/Off switch not included!
• Transponder not included!
• The switch and transponder positions can be reversed if desired.
• Racer's Tip: Center servos before horn installation!

Clutch / Filter Build - Bag 12.1, 12.2 - Step 1

Parts: 81371 Flywheel Nut, 81372 Flywheel Collet, 81370 Flywheel (4-Shoe), 81373 Clutch Shoe Pins.

Instructions:

• Engine not included!
• See next step for clutch shoe/spring installation order!
• Racer's Tip: Use a small amount of blue threadlock on the crank, do not get it into the bearing!

Clutch / Filter Build - Bag 12.1, 12.2 - Step 2

Parts: 81402 Clutch Shoe (Composite), 81367 Clutch Shoe Spring (Gold, 1.0mm), 81375 Clutch Shoes (Hard, 4-Shoe Aluminum), 81366 Clutch Shoe Spring (Green, 0.95mm), 81402 Clutch Shoe (Composite), 81375 Clutch Shoes (Hard, 4-Shoe Aluminum).

Instructions:

• Clutch Shoe/Spring Installation Order:
• Short end of clutch shoe spring installed into flywheel. Long end of clutch shoe spring installed into clutch shoe.

Clutch / Filter Build - Bag 12.1, 12.2 - Step 3

Parts: 81374 Clutch Bell (13T, Vented, 4-Shoe), 89148 Clutch Shims, 41089 3x6mm LP SHCS, 91560 Bearing (5x10x4mm).

Instructions:

• Clutch shimming instructions:
• Build assembly with shims as shown OR If clutch bell does not spin freely: Move shim from behind clutch bell to in front of clutch bell. Remove one shim from front of clutch bell.
• Recommended axial play in clutch bell - 0.2mm - 0.5mm.

Clutch / Filter Build - Bag 12.1, 12.2 - Step 4

Parts: 81458 Air Filter Cap, 81458 Air Filter Boot, 81125 Air Filter Element, 25620 3x10mm SHCS.

Instructions:

• When oiling the filter elements, place both inside a plastic bag and squeeze to help evenly coat the filter.
• Nylon Wire Tie, 6".

Clutch / Filter Build - Bag 12.1, 12.2 - Step 5

Parts: 25620 3x10mm SHCS, 81115 Engine Mount, #1596 thread lock.

Instructions:

• Exhaust spring not included!
• Exhaust Pipe not included!

Clutch / Filter Build - Bag 12.1, 12.2 - Step 6

Parts: 81560 Pipe Mount, #1596 thread lock, 7732 4x4mm Set Screw, 81560 Pipe Mount Wire, 81262 4x10mm FHCS, 81114 Engine Mount Washer, 81262 4x10mm FHCS.

Instructions:

• Header pipe not included!
• Header pipe gaskets not included!

Clutch / Filter Build - Bag 12.1, 12.2 - Step 7

Instructions:

• When installing your engine, make sure the rear drive shaft does not interfere with the engine block. You may need to remove material from the engine block for fitment.
• Exhaust Set Screw not included!

Fuel Tank Build - Bag 13.1, 13.2 - Step 1

Parts: 81559 Fuel Tank Lid Puller, 81557 Fuel Tank Clip, 81557 Fuel Tank, 41090 3x10mm LP SHCS, 81558 Fuel Tank Grommet, 81557 Fuel Tank Post, 81262 4x10mm FHCS, 89203 3x16mm BHCS, #1596 thread lock, 31520 2.5x6mm BHCS, 7724 Fuel Tubing (Cut to 22mm long).

Instructions:

• Racer's Tip: Install fuel tank posts to chassis before installing the fuel tank.

Fuel Tank Build - Bag 13.1, 13.2 - Step 2

Instructions:

• Pressure line from fuel tank lid to exhaust pipe.
• Fuel line from fuel tank to carburetor.

Wheels / Tires / Body - Misc. - Step 1

Instructions:

• Wheels, Tires, and Foam Inserts Not Included!
• Tires: When gluing tires to wheels, use a fast-curing tire glue (CA) (AE #1597). This is available at your local hobby shop. Make sure to clean the mounting surface of the tire and wheel with alchohol for best adhesion.
• Build four wheels/tires.

Wheels / Tires / Body - Misc. - Step 2

Parts: 81082 Wheel Nuts (17mm) (Blue).

Instructions:

• Install wheel nuts with the serrated edge towards the wheel.

Wheels / Tires / Body - Misc. - Step 3

Parts: 2208 Body Clip, 81568 Body, 81568 Nose Cone, 31531 3x6mm BHCS.

Instructions:

• Final chassis ride height: Front - 23mm, Rear - 26mm.
• Painting Tips: Your kit comes with a clear polycarbonate body. You will need to prep the body before you can paint it. Wash the inside thoroughly with warm water and liquid detergent. Dry the body using a clean, soft, lint-free cloth. Install the window masks on the inside of the body. (RC cars get painted on the inside). Using high quality masking tape, apply tape to the inside of the body to create a design. Spray (either rattle can or airbrush RC specific paint) the paint to the inside of the body (preferably dark colors first, lighter colors last).
• NOTE: use ONLY paint that is recommended for use with (polycarbonate) plastics. If you do not, you can destroy the polycarbonate body!
• After painting, cut the body along the trim lines. Make sure to drill or use a body reamer to make the holes for the body mounts and antenna!
• Kit RWB chassis uses the rear engine, tuning, and exhaust cutouts. Please check before trimming as your engine/pipe may vary.

Droop Settings

Set droop by measuring overall length of shock (from standoff to shock pin) while the chassis is elevated above your working surface. The shocks should be fully extended.

Kit setup for front droop is 101 mm shock length, and 126mm shock length for the rear “C” hole.

If the shock length is too long, adjust by turning the droop screws clockwise.

If the shock length is too short, adjust by turning the droop screws counter-clockwise.

Front Droop: Increasing front droop (loosen droop screws) will increase off-throttle steering. It also allows the front end to lift more, giving more rear grip and less front grip on-power. Remember to never loosen the screws beyond the FULL DROOP setting. Decreasing front droop (tighten droop screws) yields more on-power steering and quicker response at the expense of some stability in bumpy sections. It will also give less off-throttle steering.

Rear Droop: Increasing rear droop (loosen droop screws) will increase traction in bumpy sections, but will reduce high-speed stability. Remember to never loosen the screws beyond the FULL DROOP setting. Decreasing rear droop (tighten droop screws) will increase stability in high speed sections, but will reduce stability in bumpy sections.

Setup Sheets: To find different setups for your kit, visit our website, https://www.associatedelectrics.com/teamassociated/ and click on the "Setup Sheets" link, and then the link to your model. Our team of professional drivers help develop these setups at races worldwide. Additionally, most drivers have a "base” setup that they use as a starting point for most races. Try running some of our base setups or look for track conditions and tires that are similar to your local track and replicate that setup. Remember, each adjustment has a purpose, so copy everything from the setup sheet and then make adjustments based on the recommendations in here.

Racer's Tip: Use 123mm for the middle "B" rear arm hole, and +2 or O eyelet.