EditRegioClassesn2010
50CC 4 - 6 All 50cc Bikes are eligible to compete (stock bore)
50CC 7- 8 All 50cc Bikes are eligible to compete (stock bore)
50cc 4-9 Open All 50cc Bikes are eligible to compete (stock bore)
65C 7-11
Nov C
65cc 2 Stroke - 65cc to 90cc 4 Stroke
65B 7-11
AM B
65cc 2 Stroke - 65cc to 90cc 4 Stroke
65A 7-11
Ex A
65cc 2 Stroke - 65cc to 90cc 4 Stroke
65 Open 12+Under 
All Levels
65cc 2 Stroke - 65cc to 90cc 4 Stroke
85C 7-15
Nov C
85cc 2 Stroke - 85cc to125cc 4 Stroke - No Big Wheels allowed in 85 classes
85B 7-15
AM B
85cc 2 Stroke - 85cc to125cc 4 Stroke - No Big Wheels allowed in 85 classes
85A 7-15
Ex A
85cc 2 Stroke - 85cc to125cc 4 Stroke - No Big Wheels allowed in 85 classes
Super Mini 12-16
All Levels
85cc to 112cc 2 Stroke  - 85cc to 150cc 4 Stroke  - Big Wheels allowed
250C
(Lites)
NOV - C 125cc to 250cc 2 Stroke 
250cc
4 Stroke
 
250B
(Lites)
AM - B 125cc to 250cc 2 Stroke 
250cc
4 Stroke
250A
(Lites)
EX  A 100%
Pay back
125cc to 250cc 2 Stroke 
250cc
4 Stroke
Youth A&B
scored
together
Youth
AM & Ex
A&B
85cc(Big wheel) to 144cc 2 Stroke 
150cc(Big wheel) to 250cc
4 Stroke 
 
Youth C Youth Nov C 85cc(Big wheel) to 144cc 2 Stroke 
150cc(Big wheel) to 250cc
4 Stroke 
450 C (MX) NOV C  250+ 2 stroke  / 250+ 4 stroke
450B (MX) AM B  250+ 2 stroke / 250+ 4 stroke
450A (MX) EX  A 100% Pay Back  250+ 2 stroke /  250+ 4 stroke
Open C NOV C 125 +CC
Open B Am B 125 +CC
Open A EX A 125+ CC 75% Payback
Over 30 C Nov C 125 +CC
Over 30  B Am  B 125 +CC
Over 30 A Ex A 125+CC 50% Payback
Over 40 C Nov C 125  +CC
Over 40  B Am B 125 +CC
Over 40 A Ex A 125+ cc 50% Payback
Girls 85cc to 112cc 2 Stroke  / 85cc to 150cc 4 Stroke 
Big Wheels allowed
Min wheel size 17 front - 14 rear 
Max wheel size 19 front 16 rear
Women 125cc to 250cc 2 Stroke / 250cc 4 Stroke
Wheel size 21 front - 19 rear