Posted 11.23.20
2021 ATVMX PRODUCTION STOCK CLASS CHART | ||
ITEMS IN QUESTION | Notes | |
Yes: Allowed to change or modify | No: NOT allowed to change or modify; must remain OEM | |
BODY AND CONTROLS | ||
Handlebars | Yes | |
Hand Guards | Yes | |
Clutch Lever | Yes | |
Grips | Yes | |
Bumper | Yes | |
Grab Bar | Yes | |
Steering Stabilizer | Yes | |
Safety Reflectors | Yes | |
Clutch Cables | Yes | |
Plastics | Yes | |
Seat Covers | Yes | |
Seat Foam or Pan | Yes | |
Headlight and Brake Light | Yes | |
Skid Plates | Yes | |
Powder Coat / Paint | Yes | |
Parking Brake | Yes | |
Handlebar Risers | Yes | |
Steering Stem | Yes | |
Steering Flag | No | |
Bar Clamp | Yes | |
Foot Pegs | Yes | |
Heal Guards | Yes | |
Shift Lever | Yes | |
Throttle Housing | Yes | Includes switching to twist |
Decal | Yes | |
Radiator Shrouds or Louvers | Yes | |
Add Foam (Mud Inhibitor) | Yes | |
BRAKES | ||
Brake Master Cylinder | No | |
Brake Pads | Yes | |
Brake Rotors | Yes | |
Brake Lines | Yes | |
Pedal / Levers | Yes | |
Rear Brake Hub | No | |
ENGINE | ||
Internal Engine Modification | No | Including engine blue printing and crank balancing; Must use OEM replacement parts |
Cylinder Bore Replating | Yes | |
Exhaust | No | Whole or part; May remove emissions pieces |
Muffler | No | |
Timing Plugs | Yes | |
Clutch Plates | Yes | Must maintain OEM shape design and material |
Clutch Arm | No | |
ECU | No | Flashing OEM ECU permitted |
Carburator | No | Jetting permitted |
Leak Jet | No | |
Fuel Screw | No | |
Carb Float Bowl | No | |
Throttle Body | No | |
Intake Spacer | No | |
Reed Valves and Assembly | No | |
Oil Injection System | No | Must use oil |
ECV (Exhaust Control Valve) | No | |
Cherry Bomb (Suz) | No | |
Clutch Cover | No | |
Ignition Cover | No | |
CHASSIS | ||
Ti Bolts | No | Unless sold on production quad |
Ceramic Bearings | No | Unless sold on production quad |
Bearing | Yes | Must maintain OEM shape, design, and material |
Air Intake Boot | No | |
Air Box | No | May remove lid |
Air Box Vent Tubes | Yes | |
Air Filter | Yes | |
Air Filter Screen | No | May not remove |
Oil Cooler | No | |
Gas Tank Thermal Cover | Yes | |
Countershaft Cover / Case Saver | Yes | |
Drain Bolts and Filler Plugs | Yes | cosmetic only |
Radiator Hoses | Yes | |
Radiator | No | |
Radiator Fan | No | |
Wiring Harness | Yes | |
ECU Location | Yes | May move |
Capacitor / Condenser | Yes | May add |
Solder Fuel Pump Connection | Yes | |
Breather Box | Yes | May move vent lines |
Battery | Yes | |
DRIVE | ||
Chains | Yes | |
Sprockets | Yes | |
Chain Guides | Yes | |
Chain Rollers/ Sliders | Yes | |
Sprocket Hub | No | |
FRAME | ||
Frame | No | Material may be added for strength |
Subframe | No | Material may be added for strength |
Subframe Support Rails | Yes | |
SUSPENSION | ||
Internal Modifications | Yes | Respring and revalve only allowed; Compressed and extended length must maintain OEM spec. |
Shock Springs | Yes | |
Shock Valving | Yes | |
A-Arms | No | |
Swingarm | No | |
Linkage | No | |
Bushings | Yes | Must remain same material as OEM |
WHEELS AND AXLE | ||
Wheels | Yes | |
Tires | Yes | |
Front Hubs | No | |
Front Spindles | No | |
Rear Hubs | No | |
Axle | Yes | |
REQUIRED | ||
Kill switch | Yes | |
Nerfbars | Yes |