1977 British motorcycle Grand Prix

  1977 British Grand Prix

Race details
Race 13 of 13 races in the 1977 Grand Prix motorcycle racing season
Date	13–14 August 1977
Official name	John Player British Grand Prix[1][2][3][4]
Location	Silverstone Circuit
Course	Permanent racing facility 4.711 km (2.927 mi)
500cc
Pole position Rider Barry Sheene Time 1:32.990 Fastest lap Rider Steve Parrish Time 1:34.270 Podium First Pat Hennen Second Steve Baker Third Teuvo Länsivuori
350cc
Pole position Rider Kork Ballington Time 1:35.770 Fastest lap Rider Kork Ballington Time 1:36.060 Podium First Kork Ballington Second Olivier Chevallier Third John Williams
250cc
Pole position Rider Takazumi Katayama Time 1:38.290 Fastest lap Rider Eric Saul Time 1:38.270 Podium First Kork Ballington Second Aldo Nannini Third Eric Saul
125cc
Pole position Rider Harald Bartol Time 1:45.650 Fastest lap Rider Eugenio Lazzarini Time 1:44.780 Podium First Pierluigi Conforti Second Eugenio Lazzarini Third Jean-Louis Guignabodet
Sidecar (B2A)
Pole position Rider Rolf Biland Time 1:39.860 Fastest lap Rider Werner Schwärzel Time 1:57.180 Podium First Werner Schwärzel Second Rolf Steinhausen Third George O'Dell

The 1977 British motorcycle Grand Prix was the thirteenth and final round of the 1977 Grand Prix motorcycle racing season. It took place on 13–14 August 1977 at Silverstone Circuit.

1977 marked the beginning of a new era, as it was the first time the event was held on the British mainland after the Isle of Man TT had represented the United Kingdom on the FIM Grand Prix calendar for the previous 28 years since the championship's inception in 1949.^[5] Once the most prestigious race of the year, the Isle of Man TT had been increasingly boycotted by the top riders, and finally succumbed to pressure for increased safety in racing events.^[5] It was also the final grand prix for 15-time world champion Giacomo Agostini.

Steve Parrish retired from the lead after his teammate and close friend Barry Sheene famously wrote "gas it wanker" on a pitboard.^[6]