World Champions of 1957 - Motorcycle Sports

Motocross World Championship 1957
Motocross - 500cc		SWE	Bill NILSSON
Road Racing World Championship 1957
Road Racing - 500cc		ITA	Libero LIBERATI
Road Racing - 350cc		AUS	Keith CAMPBELL
Road Racing - 250cc		GBR	Cecil SANDFORD
Road Racing - 125cc		ITA	Tarquinio PROVINI