Youth 50
CRF-50, XR-50, PW-50, or TTR-50 allowed (all other bikes require race director approval)
May change tires, jetting, fork internals, controls (levers, handlebars, pegs, and shifter), and seat
Must use OEM carb, OEM swing arm, and OEM size wheels
Youth 110
CRF-110, TTR-110, and KLX-110 allowed (all other bikes require race director approval)
May change tires, jetting, fork internals, controls (levers, handlebars, pegs, and shifter), and seat
May change wheel size
May change to manual clutch (for those with centrifugal clutch)
May drill out exhaust restrictor plate
Must use OEM carb and swing arm
Fuel injected bikes are not allowed to be retuned
Youth Open
Any 4 stroke bike under 126cc allowed
Any 2 stroke bike under 66cc allowed
Open modifications
All modifications must be safe, race director decision is final
Stock 125
TTR-125(L and LE), CRF-125FB, CRF-100, XR-100, KLX-125, DRZ-125, Z125, and Grom allowed (all other bikes require race director approval)
All bikes must be the “big wheel” version where applicable
Front wheels may be changed to 16” using OEM style hub
May change tires, jetting, fork internals, controls (levers, handlebars, pegs, and shifter), and seat
Must use OEM carb, OEM swing arm, and OEM size wheels
Fuel injected bikes are not allowed to be retuned
F1
Any 4 stroke bike under 126cc allowed
Any 2 stroke bike under 66cc allowed
Open modifications
All modifications must be safe, race director decision is final
Adult Open
Any 4 stroke bike under 190cc allowed
Any 2 stroke bike under 86cc allowed
Open modifications
All modifications must be safe, race director decision is final
Motard
Any bike 450cc and under allowed
Open modifications
All modifications must be safe, race director decision is final
Competitors may “race up” to this class only
if approved by race director.