The season consisted of twelve Grand Prix races in six classes: 500cc, 350cc, 250cc, 125cc, 50cc and Sidecars 500cc. It began on 9 May, with Austrian Grand Prix and ended with Spanish Grand Prix on 26 September.
The season included twelve Grand Prix races in six classes: 500cc, 350cc, 250cc, 125cc, 50cc and Sidecars. It started on May 9th with the Austrian Grand Prix and concluded with the Spanish Grand Prix on September 26th.