Riders must hold a valid ACU license for the class they choose race in. Please see ACU guidelines below.
Minimum 49cc 2 or 4 stroke. Maximum 50cc 2 or 4 stroke single speed automatic, no manual clutch .
Maximum 12 inch rear, 15 inch front
Minimum 60cc 2 stroke or 85cc 4 stroke. Maximum 65cc 2 stroke or 110cc 4 stroke.
12 inch rear, 14 inch front
Minimum 70cc 2 stroke or 125cc 4 stroke. Manual clutch, maximum 85cc 2 stroke or 150cc 4 stroke.
14 inch rear, 17 inch front
Minimum 70cc 2 stroke or 125cc 4 stroke. Manual clutch, maximum 85cc 2 stroke or 150cc 4 stroke.
16 inch rear, 19 inch front
Minimum 120cc 2 stroke maximum 125cc 2 stroke, manual clutch.
19 inch rear, 21 inch front
Minimum 120cc 2 stroke or 175cc 4 stroke. Maximum 150cc 2 stroke or 250cc 4 stroke. Manual clutch.
19 inch rear, 21 inch front
Minimum 120cc up to maximum 650cc 2 stroke Minimum 175cc up to maximum 650cc 4 stroke Electric powered machines with an output of up to 16kw (22hp) measured at the rear wheel
Minimum 120cc up to maximum 650cc 2 stroke Minimum 175cc up to maximum 650cc 4 stroke Electric powered machines with an output of up to 16kw (22hp) measured at the rear wheel