Classes
A - Expert - 2 or 4 stroke, up to 350cc Pre '70
B - Expert - 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.