Class
A Experts 2 or 4 stroke, up to 350cc Pre '70
B Experts Over 350cc / Twins / Pre Unit Pre '70
C Intermediates Any cc – 2 or 4 stroke Pre '70
D Clubman Any cc – 2 or 4 stroke Pre '70
E Rigid's Any cc Pre '70
G Gentlemen In at Begins, exit at End Card, anywhere in between