Tadayuki Okada Honda 1998 Michael Doohan Honda Max Biaggi Àlex Crivillé Honda 1997 Michael Doohan Honda Tadayuki Okada Nobuatsu Aoki Honda 1996 Michael Doohan Honda Àlex Crivillé Luca Cadalora Honda 1995 Michael Doohan Honda Daryl Beattie Luca Cadalora Honda 1994 Michael Doohan Honda Luca Cadalora John Kocinski Honda 1993 Kevin Schwantz Suzuki Wayne Rainey Daryl Beattie Yamaha 1992 Wayne Rainey Yamaha Michael Doohan John Kocinski Honda 1991 Wayne Rainey Yamaha Michael Doohan Kevin Schwantz Yamaha 1990 Wayne Rainey Yamaha Kevin Schwantz Michael Doohan Yamaha 1989 Eddie Lawson Honda Wayne Rainey Christian Sarron Honda 1988 Eddie Lawson Yamaha Wayne Gardner Wayne Rainey Yamaha 1987 Wayne Gardner Honda Randy Mamola Eddie Lawson Yamaha 1986 Eddie Lawson Yamaha Wayne Gardner Randy Mamola Yamaha 1985 Freddie Spencer* Honda Eddie Lawson Christian Sarron Honda 1984 Eddie Lawson Yamaha Randy Mamola Raymond Roche Honda 1983 Freddie Spencer Honda Kenny Roberts Randy Mamola Honda 1982 Franco Uncini Suzuki Graeme Crosby Freddie Spencer Suzuki 1981 Marco Lucchinelli Suzuki Randy Mamola Kenny Roberts Suzuki 1980 Kenny Roberts Yamaha Randy Mamola Marco Lucchinelli Suzuki 1979 Kenny Roberts Yamaha Virginio Ferrari Barry Sheene Suzuki 1978 Kenny Roberts Yamaha Barry Sheene Johnny Cecotto Suzuki 1977 Barry Sheene Suzuki Steve Baker Pat Hennen