BEGINNER: This class is intended to introduce new riders into racing and help them develop track etiquette and race technique before they graduate into championship classes. Riders are allowed to remain in the class for up to a half season but do not compete for championship points. Race director has the ability to move riders out of this class at any time if he/she feels that there is an unfair advantage.
Bikes allowed: Any motorcycle, GP or Motard frame, max displacement of 65cc (2 Stroke), or 150cc (air cooled 4 stroke).
Bikes allowed: CRF50 and TTR50 only. No engine mods or knobby tires allowed.
Bikes allowed: Modified CRF50 and TTR50. Up to 88cc engine displacement allowed. Manual clutch kit allowed. NOT PERMITTED FOR THIS CLASS: Stroker cranks. Any displacement over 88cc. 4-5-6 speed transmission (must be kept to 3 speed transmission). Stock frame, stock fork tubes, stock wheel size, stock swingarm must be retained.
Bikes allowed: Honda NSR50, everything must remain stock, Yamaha YSR50, aftermarket carbs & exhaust are allowed. Suspension springs may be replaced but the internals must remain stock. Controls such as pegs, rear sets, throttle tubes, ect. May also be changed. Bodywork and gearing may also be changed.
Formula 5 Expert:
Bikes allowed: Max displacement of 63.9cc (2 Stroke) & 128cc (air cooled 4 Stroke). Engine mods are allowed.
Novice class for lightweight bikes. Bikes allowed: Max displacement of 63.9cc (2 Stroke) & 128cc (air cooled 4 Stroke). Engine mods are allowed.
Bikes allowed: GP or Motard frames, max displacement of 65cc (2 Stroke) & 150cc (air cooled 4 Stroke)
65 GP Vet 30: This class has the same restrictions as the 65GP class but for the big boys. Bikes must conform to the 65GP class specs however rider must be atleast 30 years old to enter.
Super Street 125:
Bike allowed: Any STREET LEGAL Four Stroke 125. Max displacement 128cc. Grom, Z125 Pro, etc. Bike must have come street legal from the factory to be eligible. Stock bore, head, cylinder, fork tubes and frame. No forced induction allowed. ECU plug ins (I.E. Power Commander and similar products) are allowed, however ECU must remain stock.
Bikes allowed: GP & Motard frame, max displacement of 112cc (2 Stroke) & up to 150cc (4 Stroke). Unlimited engine mods allowed.
Super Mini Vet 30:
Bikes allowed: GP & Motard frame, max displacement of 112cc (2 Stroke) & up to 150cc (4 Stroke). Unlimited engine mods allowed. Must be atleast 30 years old to enter.
85/150 Only: This class has the same rules as the Super Mini class, however no smaller displacement bikes allowed.
Bikes allowed: GP & Motard frame, displacement cannot be below or above 85cc-112cc (2 Stroke) & 130-150cc (4 Stroke).
Bikes allowed: Street/GP/Dirt, displacement of 125-250cc (2 Stroke) & 150cc-450cc (4 Stroke). Unlimited engine mods allowed.
Bikes allowed: Max displacement of 160cc air cooled 4 stroke, GP chassis only. Engine modifications are allowed.
Ohvale Cup - Spec Class 110cc/160cc/190cc
Bikes allowed: Only Ohvale machines are allowed in these classes. No engine or chassis modifcations are allowed. All engines are to remain sealed. Carburetors are to remain stock type and size for the particular engine, jetting adjustments are allowed. The suspension must remain stock, no Ohlins upgrades are allowed. Form caps with preload adjuster are allowed to be installed and fork oil can be changed to a different weight. Suspension adjustment is allowed for rider weight and track conditions.