Who won the 1975 MotoGP championship?

Giacomo Agostini won the 1975 MotoGP riders’ championship, racing for Yamaha.

Yamaha also took the manufacturers’ championship that season.

It was one of Giacomo Agostini’s 8 MotoGP titles (1966, 1967, 1968, 1969, 1970, 1971, 1972, 1975).