Category: Race Classes
Period 4 – Post Classic – 1 January 1963 to 31 December 1972
CLASSES OF COMPETITION: 125cc | 126-350cc | 500cc | 750cc | 1300cc
Period 5 – Forgotten Era – 1 January 1973 to 31 December 1982
CLASSES OF COMPETITION: 125cc | 126-350cc | 350cc | 500cc | 750cc | 1300cc
Period 6 – New Era – 1st January 1983 to 31 December 1990
CLASSES OF COMPETITION: 250GP | 250Production | 500cc | 750cc | 1300cc
Commuterlites
CLASSES OF COMPETITION: Motolite | Superlite | Commuterlite
Pre-Modern (PM) – 1 January 1991 to 31 December 1997
CLASSES OF COMPETITION: 250GP | Formula 3 | Supersport | Superbike | Unlimited
