* denotes 2008 Change

* [250A] 122-250cc 2 or 4-stroke (Cash Class)

* [250B] 122-250cc 2 or 4-stroke (Award Class)

* [250C] 122-250cc 2 or 4-stroke (Award Class)

* [Open A] 122-Opencc 2 or 4-stroke (Cash Class)

* [Open B] 122-Opencc 2 or 4-stroke (Award Class)

* [Open C] 122-Opencc 2 or 4-stroke (Award Class)

[+25A] 86cc-Open  (Cash Class) Ages 25 & up

[+30A] 86cc-Open  (Cash Class) Ages 30 & up

[+30B/C] 86cc-Open  (Award Class) Ages 30 & up, B and C class riders

[+40A] 86cc-Open  (Cash Class) Ages 40 & up

* [14-24 A/B/C] 122-Open cc 2 or 4-stroke (Award Class) A, B & C class riders

[Women] Female (9yrs-Up) (Award Class)

[Non-Current] Bike must be 5 years old at beginning of year (Award Class)

[Open] 251-500cc 2-stroke or 390-650cc 4-stroke (Award Class)

Youth Classes   **Age is as of January 1st**   Wheelbase limits as per AMA Rules

* [Schoolboy] 122-125cc 2 or 4-stroke (min 53" wheelbase) (Award Class) 12-15 years old

[85 Senior] 66-85cc 2-stroke or 75-125cc 4-stroke (Award Class) 12-15 years old

[85 Junior] 66-85cc 2-stroke or 75-125cc 4-stroke (Award Class) 9-11 years old

* [85 Open]  79-112cc 2-stroke or 75-150cc 4-stroke, includes Big wheel 85’s Super mini's and 100’s (Award Class) 7-15 years old

[65 Senior] 52-65cc 2-stroke or 52-90cc 4-stroke (Award Class) 10-11 years old

[65 Junior] 52-65cc 2-stroke or 52-90cc 4-stroke (Award Class) 7-9 years old

[65 Open] 52-65cc 2-stroke or 52-90cc 4-stroke(Award Class) 7-11 years old

[50 Open] 0-51cc (Award Class) 4-8 years old

[50 Senior] 0-51cc (Award Class) 7-8 years old

[50 Junior] 0-51cc (Award Class) 4-6 years old

[50 Shaft] 0-51cc Shaft-Beginners Only (Award Class) 4-6 years old (Not a Series points class)