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Oklahoma Super Bikers Class Structure

Formula 1

1.      Maximum displacement of 50cc air cooled 4-stroke pre-1995 technology, 50cc air cooled 2-strokes.

2.      No engine modifications allowed, i.e. - stock carb and bore. Standard maintenance bores, aftermarket exhaust, jetting, and pod filters allowed.

3.      10 inch wheel size and under.

4.      Original motor and frame combo must remain.

5.      Children 6 and under are limited to this class or subject to Race Director discretion.

 Legal bikes for this class include but are not limited to: XR 50, Z 50, TTR 50, PW 50, and Suzuki Jr. 50. YSR50 not allowed.

 Formula 2

1.      Maximum displacement of 110cc air cooled 4-stroke auto clutch, 100cc air cooled 4-stroke manual clutch, 55cc water cooled 2-stroke, and 65cc air cooled 2-stroke.

2.      Any engine mods within CC range.

3.      14 inch wheel size and under.

4.      No GP frames allowed, any other frame and engine combo is allowed.

 Legal bikes for this class include but are not limited to: KLX/DRZ 110, XR 100, TTR 90, YSR/XR 100 combo, KTM 50, YSR 50/60, and NSR 50 in stock form.

 Formula 3

1.      Maximum displacement of 131cc air cooled 4-stroke, 65cc water cooled 2-stroke, 80cc air cooled 2-stroke.

2.      Any engine mods within CC range.

3.      No limit on wheel size.

4.      No GP frames allowed, all other frame and engine combo is allowed.

 Legal bikes for this class include but are not limited to: Extreme 125, XR 100/big bore, KX 65, KTM 65, YZ/KX/RM/CR 80 air cooled, KLX/DRZ 110/big bore, NSR 50/big bore, Derbi 50/big bore, and Aprilia 50/big bore.

 Formula 4

1.      Maximum displacement of 230cc air cooled 4-stroke, 130cc water cooled 4-stroke, and 85cc water cooled 2-stroke.

2.      No limit on wheel size.

3.      Any frame.

 Legal bikes for this class include but are not limited to: CRF 230, XR 200, TTR 225, CRF 150, YZ/KX/RM/CR 85, Moriwaki 80, and RS 80.

 Formula 5

1.      Maximum displacement 415cc air cooled 4-stroke, 250cc water cooled 4-stroke, 125cc water cooled 2-stroke, DRZ 400 in stock form eligible for this class. 

2.      Motard class only. 

3.      Any engine mods within CC range.

 Legal bikes for this class include but are not limited to: CRF/YZF/ KX/RMX 250, XR 400, DRZ 400, and CR/YZ/KX/RM 125. 

 Formula 6

1.      Maximum displacement unlimited. 

2.      Motard class only.

3.      Any engine mods.     

 Legal bikes for this class include but are not limited to: CRF/YZF/KX/RMX/KTM 450, KTM 525, DRZ/XR 650, and CR/YZ/KX/RM 250. 

 All rules, class distinctions, and age limitations are subject to Race Director discretion. Classes may be changed to maintain a competitive balance or to accommodate unique machinery. If enough bikes show up that are “in-between” classes, we will do everything in our power to set up a class structure that will allow them to be competitive. Basically, whatever you show up with, we will find a place for you to race.

 

 

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