| 1984 | Dutch TT · Grand Prix | Yamaha | 6 | | Classified |
| 1984 | Belgian Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1985 | Italian Grand Prix · Grand Prix | Yamaha | 15 | | Classified |
| 1985 | Austrian Grand Prix · Grand Prix | Yamaha | 9 | | Classified |
| 1987 | Japanese Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1987 | Spanish Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1987 | German Grand Prix · Grand Prix | Yamaha | 4 | | Classified |
| 1987 | Italian Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1987 | Austrian Grand Prix · Grand Prix | Yamaha | 9 | | Classified |
| 1987 | Yugoslavian Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1987 | Dutch TT · Grand Prix | Yamaha | 18 | | Classified |
| 1987 | British Grand Prix · Grand Prix | Yamaha | 8 | | Classified |
| 1987 | Swedish Grand Prix · Grand Prix | Yamaha | 13 | | Classified |
| 1987 | Czechoslovak Grand Prix · Grand Prix | Yamaha | 3 | | Classified |
| 1987 | San Marino Grand Prix · Grand Prix | Yamaha | 4 | | Classified |
| 1987 | Portuguese Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1987 | Brazilian Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1987 | Argentine Grand Prix · Grand Prix | Yamaha | 8 | | Classified |
| 1988 | Japanese Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1988 | Italian Grand Prix · Grand Prix | Yamaha | 10 | | Classified |
| 1988 | British Grand Prix · Grand Prix | Yamaha | 10 | | Classified |
| 1988 | Swedish Grand Prix · Grand Prix | Yamaha | 14 | | Classified |
| 1988 | Czechoslovak Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1989 | Japanese Grand Prix · Grand Prix | Yamaha | 8 | | Classified |
| 1989 | Australian Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1989 | United States Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1989 | Spanish Grand Prix · Grand Prix | Yamaha | 8 | | Classified |
| 1989 | Swedish Grand Prix · Grand Prix | Yamaha | 10 | | Classified |
| 1989 | Czechoslovak Grand Prix · Grand Prix | Yamaha | 9 | | Classified |
| 1990 | Japanese Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1990 | Australian Grand Prix · Grand Prix | Yamaha | — | | Ret |