Sportwerks Mayhem RTR Assembly and Operation Manual Specifications: Length: Width: Track: Wheelbase: Weight: Gear ratio: 19.4 in (492mm) 12.2 in (310mm) Front - Adjustable 10.6–12.2 in (270–310mm) Rear - 12.2 in (310mm) Adjustable 12.8–13.0 in (325–330mm) 7.6 lb (3450 g) 10.
Introduction Thanks for your purchase. If you’re new to off-road gas, hang on! You’re about to discover just how much fun trying to tame an overpowered 1/8-scale monster can be. If you’re already into racing, the Mayhem™ RTR will have you on the track in minutes with a competitive buggy of the highest caliber. The Mayhem RTR is based on the racewinning Mayhem Pro. It is professionally built and assembled by racers.
Table of Contents Introduction..............................................................................2 Table of Contents ....................................................................3 Required Equipment................................................................4 Recommended Tools...............................................................5 Quick Start...............................................................................6 Engine Starting and Break-in ..........................
Required Equipment Additional equipment required for assembly (not included) • 6-cell 7.2 volt car pack (DYN1000 recommended) • 12 “AA” Alkaline batteries Additional item needed to operate • • • • Glow igniter Air filter oil Car fuel Fuel bottle Note: Dynamite® offers a starter pack that includes the above items plus it includes extra glow plugs, a plug wrench and fuel line. (DYNSTART2).
Recommended Tools While the Mayhem™ comes assembled and no tools are required, you’ll find the following tools helpful when maintaining your Mayhem: Recommended Tools • • • • • • • • Page 5 1.5mm hex wrench 2mm hex wrench 2.
Quick Start Step #1 Step #2 Step #3 Install 8 “AA” batteries in the transmitter noting the proper direction of each cell. Open the radio box and Install 4 “AA” batteries in the battery holder noting the proper direction of each cell. Insert the antenna tube in the top of the radio box. Feed the receiver antenna through the tube until several inches extend out the top. Install the antenna tip.
Step #4 Step #5 Step #6 Install a charged 6-cell 7.2-volt battery in the starter and attach the plug. Turn on the transmitter and then the receiver. Check to make sure that the servos are operating correctly and that the carburetor closes when the throttle trigger is released. Apply air filter oil (not included) and spread the oil uniformly onto the air filter allowing it to saturate the foam element.
Engine Starting and Break-in Your First Runs If this is your first gas car, we highly recommend that you have an experienced gas car driver help during the first startups and runs. He will be able help you properly adjust your engine for break-in and then tune your engine for reliable performance. Before attempting to start your new buggy, be sure to read this section and fully understand each step before starting your engine.
The Sportwerks Carburetor The Sportwerks .26 engine features a slide-valve carburetor and includes three inserts of various diameters. These carburetor inserts are used to alter the power curve of the engine. The three diameters included have the following effect: 6.5mm 7.5mm 9mm – Gives smooth controllable acceleration; offers best fuel mileage; best-used for slick tracks/ surfaces or beginning gas drivers.
Starting the Engine Step 1 Fill the tank with fuel Step 2 Turn on the transmitter and receiver and confirm that the radio system is working properly. Step 3 Attach the glow driver to the glow plug. Step 4 Fully insert the electric start shaft into the back of the engine. Press the start button for ten seconds then stop. The engine should turn over but likely won’t yet start. Continue these ten second starting attempts several times until the engine starts.
Adjusting the Carburetor Tuning your Engine Fine-Tuning Your Engine Tuning the Low-Speed Needle When tuning the needle valves for maximum performance, adjust them in small increments, 1⁄16 turn at a time. An engine should not be run too lean; doing so severely shortens the life of the engine. When an engine is set too lean, it will run very strong at first but will soon begin to sag and hesitate or stall when accelerating.
After Run Engine Maintainance After you’re finished racing for the day, it’s important to empty the fuel tanks and run the remaining fuel from the engine. Continue to try to start the engine for several seconds after it will no longer fire to ensure that all fuel is out of the engine. Put several drops of after run oil in the carburetor and turn the engine over on the starter box for several seconds to coat the internal engine parts with after run oil.
Brake Linkage Setup Although the break linkages are pre-set at he factory, it may be necessary to adjust them if you take the vehicle apart for cleaning or maintenance. The following covers the installation and adjustment of the linkages in such instances. Step #3 Step #7 Be sure the ball links are snapped onto the front and rear brake and on the carburetor. With the throttle at neutral, pull the front (silver knob) brake linkage through the molded pivot such that the front brakes are slightly applied.
Center Differential 96 2 89 20 18 156 37 89 93 37 93 90 79 91 93 96 57 93 81 82 41 3 50 4 86 85 83 84 84 50 82 84 20 88 91 89 57 89 79 89 18 90 Page 14
Front/Rear Differential 78 87 57 84 88 83 86 84 85 83 82 84 50 84 83 84 50 57 83 82 80 4 78 Page 15
Front and Rear Shocks 63 73 73 64 67 26 73 72 33 34 63 75 73 64 73 67 74 72 74 73 67 72 74 74 74 73 73 70 74 73 26 34 67 75 74 73 68 73 66 74 74 65 77 73 71 72 73 33 72 71 72 72 73 73 45 72 73 71 73 44 72 71 73 74 72 74 72 74 74 69 76 74 72 74 72 74 74 75 73 70 74 73 75 45 44 75 Front Shock Rear Shock Page 16 75
Steering Bellcrank 3 95 95 3 95 95 95 95 34 36 95 95 34 95 95 95 95 95 13 95 34 95 13 95 45 52 51 45 95 45 56 13 95 45 95 52 45 95 95 56 95 Page 17 45
Front Suspension 111 47 110 167 35 111 116 28 B 167 24 48 130 109 6 25 13 106 107 107 57 23 54 118 57 34 50 128 106 127 107 107 40 127 23 Page 18 28
Front Gearbox Mount 37 5 115 37 99 3 8 174 3 34 123 19 173 23 61 112 125 62 123 18 3 24 18 108 17 112 133 37 133 3 45 133 133 44 133 38 133 45 133 44 133 Page 19 112
Center Driveshaft - Front 40 14 131 91 129 91 57 54 57 94 91 Page 20
Rear Suspension 45 44 53 45 40 127 19 111 57 54 128 34 119 57 111 130 176 28 6 28 120 167 46 35 28 24 117 48 167 28 Page 21
Rear Gearbox Mount 26 8 8 37 134 44 134 134 3 45 134 18 137 38 134 45 134 134 6 44 134 136 136 121 136 62 6 61 34 164 26 18 19 99 136 17 4 4 44 24 125 121 121 24 123 34 18 34 Page 22 123
Center Driveshaft - Rear 14 91 94 57 54 57 40 129 91 91 131 Page 23
Chassis 34 105 104 2 152 159 39 153 2 9 7 10 34 3 105 11 4 8 4 104 3 8 3 3 10 Page 24 9
Radio Tray Assembly 98 37 96 96 96 96 96 98 30 97 37 96 96 37 96 97 2 96 96 96 96 96 96 4 96 96 96 37 96 100 22 96 23 31 A 96 96 23 97 30 97 12 95 97 27 23 45 22 97 34 95 24 2 23 23 102 97 99 99 99 A Page 25 157 95 51
Engine/Clutch/Air Filter 148 149 149 149 154 150 32 149 151 155 17 139 138 141 142 175 140 143 144 145 146 55 55 26 140 15 Page 26 149
Fuel Tank 27 135 49 135 135 135 1 135 135 135 23 71 135 22 135 71 43 Page 27 43
Wheel and Tire Assembly 126 60 60 59 Page 28
Key # Stock# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 SWK2022 SWK2024 SWK2026 SWK2028 SWK2032 SWK2036 SWK2054 SWK2056 SWK2062 SWK2064 SWK2074 SWK2087 SWK2089 SWK2106 SWK2122 SWK2124 SWK2128 SWK2130 SWK2139 SWK2141 SWK2222 SWK2224 SWK2226 SWK2232 SWK2254 SWK2282 27 28 29 30 31 32 SWK2290 SWK2292 SWK2296 SWK2306 SWK2311 SWK2324 Qty 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 8 8 8 8 8 8 8 Description Key # Stock# 3mm x 6mm Flathead Screw 3mm x 8mm Flathead Screw 3mm
Key # Stock# 52 53 54 55 56 57 58 59 60 SWK2560 SWK2570 SWK2600 SWK2620 SWK2640 SWK2660 SWK2701 SWK2740 SWK2840 61 62 63 64 65 66 67 SWK3000 SWK3002 SWK3004 SWK3006 SWK3008 SWK3010 SWK3012 68 69 70 71 72 SWK3016 SWK3018 SWK3020 SWK3022 SWK3024 Qty 2 2 4 2 4 4 1 2 2 2 4 4 2 4 2 2 2 2 2 2 4 4 2 2 4 2 2 2 Description Key # Stock# Tie Rod / Turnbuckle 4x50mm Camber Link / Turnbuckle 5x60mm Bearing Crush Sleeve Clutch Bearings 5x10x4mm Rubber Sealed Bearings 6x10x3mm Rubber Sealed Bearings 8x16x5mm Mayh
Key # Stock# 74 Qty SWK3028 2 2 2 2 4 2 2 2 2 4 4 4 4 4 4 4 4 4 2 2 2 2 2 2 2 2 Description Key # Stock# Rear Shock Set Shock bladder Washer 2.5x5mm Adjustment collar O-ring Adjustment collar Shock O-ring Shock shaft bushing 3.4mm Shock shaft bushing 1mm 7mm snap ring Shock cap 1mm spring clip 2mm spring clip 3mm spring clip 4mm spring clip 5mm spring clip 6.8mm shock rod end Upper spring retainer Lower spring retainer Shock eyelet 3mm washer 3mm lock nut Shock adjustment collar 2.
Key # Stock# 91 92 93 94 95 Qty SWK3098 SWK3102 SWK3104 SWK3106 SWK3108 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 4 1 1 1 1 2 1 1 3 3 1 2 2 1 1 1 Description Diff Housing Bag Lower diff housing Upper diff housing Bearing support Center diff housing (upper) Center diff housing (lower) Brake stand-off Center Diff Support Plate (RTR) Brake Cam Bag Rear brake cam Front brake cam Brake post bushings 13T Differential Pinion Steering Servo Saver Bag Servo horn adapter 23T Servo horn adapter 24T Servo horn adapter 25T
Key # Stock# 98 Qty SWK3114 1 1 99 100 104 SWK3116 SWK3118 SWK3126 2 2 1 1 1 2 1 1 1 105 SWK3128 1 1 106 SWK3130 4 4 4 4 8 107 108 109 110 SWK3132 SWK3134 SWK3136 SWK3137 4 4 2 2 2 Description Key # Stock# Antenna Bag Antenna Antenna cap Mount Bag Servo mounting pads Stand-up servo mounting pads Front body mount Rear body mount Transponder mount Steering servo mounts Switch Cover Bumper Bag Front bumper Rear bumper Chassis Mud Guard Bag Mud guard left Mud guard right Pillow Ball Assembly Ba
Key # Stock# 126 127 128 129 130 131 133 SWK3168 SWK3170 SWK3172 SWK3173 SWK3174 SWK3175 SWK3180 Qty 2 2 2 2 2 4 2 2 4 1 2 4 2 134 SWK3182 2 2 4 1 2 4 2 Description Key # Stock# 17mm Wheel Nut Wheel Hub Wheel Hub Pin Center Drive Cup Front/Rear Buggy CVD (pr) Dogbone Pin Front Sway Bar Bag Sway bar pivot ball 3mm x 14mm set screw 3mm x 3mm set screw Front sway bar Sway bar mounts 6.8mm short rod end 6.
Key # Stock# 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 167 173 174 175 176 Qty SWK3232 SWK3234 SWK3236 SWK3238 SWK3240 SWK3242 SWK3250 SWK9102 SWK9120 SWK9122 SWK9124 SWK9133 SWK9142 SWK9144 SWK9160 SWK9162 SWK9108 SWK3133 SWK3142 SWK3144 SWK2227 SWK2441 1 1 1 2 1 3 1 1 1 1 1 1 3 1 1 3 1 1 1 2 1 1 1 1 1 1 2 8 Description Key # Stock# Air Filter Bag Air filter top Air filter bottom Foam filter Tie wrap 3mm x 8mm phillips head screw Manifold/Pipe Springs Manifold Adapter Tu
Setup Sheet Gearing: Driver Date Lap times Front Shocks: Clutch Bell Pistons Spur Gear Oil Clutch Shoe Position Springs Track Conditions: Lower mounting position on arm: In Out In Mid Differential Fluids: Traction: Slick Medium High Surface: Smooth Bumpy Rough Front Layout: Tight Medium Open Center Rear Front Suspension: Engine: Track/Width Type Camber Angle Caster Position Forward Rearward Toe In Plug Deck Clearance Droop Oil Temperature Ground Clearance Springs
Setup Sheet - Stock Settings Gearing: Driver Track Lap times Front Shocks: Clutch Bell 14 Pistons 2 hole - 1.5mm (stock) Spur Gear 46 Oil 30 wt Clutch Shoe Position Trailing Springs Black Track Conditions: Lower mounting position on arm: Slick Medium High Surface: Smooth Bumpy Rough Front 5000 Layout: Tight Medium Open Center 5000 Rear 1000 Engine: Track/Width 12.1 in Camber Angle 1.
Specifications and Other Information Brake Knob - Color Code Red - Rear brake Silver - Front brake Blue - Throttle The Mayhem Comes Filled with the Following Fluids Shocks - 30 wt. oil front and rear Differentials - Center - 5000 wt Front - 5000 wt Rear - 1000 wt Specifications - Chassis Overall Length - 492mm / 19.4 in Width - 310mm / 12.2 in Wheelbase - Adjustable 325mm–330mm / 12.8–13.0 in Caster angle - Adjustable 17–24 degrees Fuel tank capacity - 126cc Internal gear ratio - 3.
Tuning Tips Differential Fluids Changing the viscosity of the fluid in the differentials affects the way the car handles and performs. The Mayhem differentials come pre-filled with 5000 wt. fluid in the center and front and 1000 wt. fluid in the rear. For most conditions, this is a good place to start. Center: Changing the fluid in the center differential affects the front to rear drive. To conceptually understand how the center differential affects handling, think of it as frontwheel vs. rear-wheel drive.
© 2004 Horizon Hobby, Inc. 4105 Fieldstone Road Champaign, Illinois 61822 (877) 504-0233 www.horizonhobby.
