The 1977 Belgian motorcycle Grand Prix was the ninth round of the 1977 Grand Prix motorcycle racing season. It took place on 3 July 1977 at the Circuit de Spa-Francorchamps. Barry Sheene won the race with an average speed of 135.0 mph making it the fastest motorcycle Grand Prix in history. 500cc classification 250 cc classification 125 cc classification 50 cc classification Sidecar classification References Belgian motorcycle Grand Prix Belgian Motorcycle Grand Prix