Premier Open Supermoto
Professional or Expert, unlimited displacement single, or twin-cylinder machines with unlimited modifications except for mandatory wheel size of 16, 16.5, 17 or 19-inches.

Pro Am 250 Supermoto
Pro, Expert or Amateur rider on single cylinder machines with maximum displacement of 125cc for liquid-cooled 2-strokes; 250cc for liquid-cooled 4-strokes, otherwise unlimited modifications. No special displacement provisions for air-cooled engines are available for this class.

Middleweight “A” Supermoto (Intermediate Rider)
Amateur rider with unlimited displacement single, or twin-cylinder machines with unlimited modifications except for mandatory wheel size of 16, 16.5, 17, 19-inches.

Middleweight “B” Supermoto (Novice Rider)
Amateur rider with unlimited displacement single, or twin-cylinder machines with unlimited modifications except for mandatory wheel size of 16, 16.5, 17, 19-inches.

Lightweight Supermoto ( Novice Rider)
Single cylinder machines with maximum displacement of 450cc (2- or 4-stroke). Original crankcase, cylinder and heads and original bore, stroke and displacement must be retained. No modifications are allowed to stock air box, suspension, exhaust or chassis. Standard size wheels (must have 21-inch front wheel) and full (stock) suspension travel. Brake rotors, pads and lines may be upgraded, but stock brake calipers must be retained. Other changes are allowed to: tires, gearing, jetting, handlebars, hand-guards, levers, grips and cosmetics. "Open traction" tire choice. DOT tires are recommended.

Veteran Plus 35 Quiet Class
Pro, Expert or Amateur rider that is 35 years old by the day of the event., with unlimited displacement single, or twin-cylinder machines with unlimited modifications. All race machines must use muffling devices that limit the sound to 100dBA. A static test may be used off track to measure the noise level by holding the dB meter at 48 inches and at a 45-degree angle from the exhaust opening(s). The engine will be steady at 1/2 of redline during this test. If a machine measures over the limit with either test it will not be allowed to participate in any further events during the weekend until it has been brought under compliance. Riders may also be fined or otherwise penalized for non-compliance.

Premier Mini-Moto
Expert rider on single cylinder machines with a maximum displacement of 85cc (2-stroke) or 160cc (4-stroke), otherwise unlimited modifications, with the exception that they must maintain a mini chassis. Minimum age 12.

Sport Mini-Moto
Novice rider on single cylinder machines with a maximum displacement of 85cc (2-stroke) or 160cc (4-stroke). Original crankcase, cylinder and heads and original bore, stroke and displacement must be retained. No modifications are allowed to stock air box, suspension, exhaust or chassis. Changes are allowed to: tires, gearing, jetting, handlebars, hand-guards, levers, grips and cosmetics, after-market brake pads may be used.