| Year | Winning Rider | Manufacturer |
|---|---|---|
| 1979 | Kenny Roberts |
Yamaha
|
| 1981 | Randy Mamola |
Suzuki
|
| 1982 | Franco Uncini |
Suzuki
|
| 1983 | Freddie Spencer (1/2) |
Honda
|
| 1984 | Freddie Spencer (2/2) |
Honda
|
| 1985 | Eddie Lawson (1/2) |
Yamaha
|
| 1986 | Eddie Lawson (2/2) |
Yamaha
|
| 1987 | Wayne Gardner (1/2) |
Honda
|
| 1988 | Wayne Gardner (2/2) |
Honda
|
| 1989 | Kevin Schwantz |
Suzuki
|
| 1990 | Wayne Rainey |
Yamaha
|