14-17 400cc Open Production

• 300-400cc 4-stroke, 91-250cc 2-stroke

12-15 300cc Boys

• 300cc Max Production ​

12-15 300cc Girls

• 300cc Max Production ​

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1. Production Rule: OEM motor and matching frame combination model required (matching year NOT required). Frame must remain as designed by OEM, including all suspension pivot points. Engine modifications, frame reinforcements, and after market A-arms, caster brackets, swing-arms and suspension are permitted.

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