| 1987 | Japanese Grand Prix · Grand Prix | Yamaha | — | | NC |
| 1987 | Dutch TT · Grand Prix | Yamaha | 10 | | Classified |
| 1987 | Portuguese Grand Prix · Grand Prix | Yamaha | 3 | | Classified |
| 1988 | Japanese Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1988 | United States Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1988 | Spanish Grand Prix · Grand Prix | Yamaha | 1 | | Classified |
| 1988 | Expo 92 Grand Prix · Grand Prix | Yamaha | 3 | | Classified |
| 1988 | Italian Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1988 | German Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1988 | Austrian Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1988 | Dutch TT · Grand Prix | Yamaha | 4 | | Classified |
| 1988 | Belgian Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1988 | Yugoslavian Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1988 | French Grand Prix · Grand Prix | Yamaha | 9 | | Classified |
| 1988 | British Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1988 | Swedish Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1988 | Czechoslovak Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1988 | Brazilian Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1989 | Japanese Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1989 | Australian Grand Prix · Grand Prix | Yamaha | 4 | | Classified |
| 1989 | United States Grand Prix · Grand Prix | Yamaha | 4 | | Classified |
| 1989 | German Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1989 | Austrian Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1989 | Yugoslavian Grand Prix · Grand Prix | Yamaha | 4 | | Classified |
| 1989 | Dutch TT · Grand Prix | Yamaha | 4 | | Classified |
| 1989 | Belgian Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1989 | French Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1989 | British Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1989 | Swedish Grand Prix · Grand Prix | Yamaha | 5 | | Classified |
| 1989 | Czechoslovak Grand Prix · Grand Prix | Yamaha | 7 | | Classified |
| 1989 | Brazilian Grand Prix · Grand Prix | Yamaha | 6 | | Classified |
| 1990 | Japanese Grand Prix · Grand Prix | Suzuki | 4 | | Classified |
| 1990 | United States Grand Prix · Grand Prix | Suzuki | — | | Ret |
| 1991 | Japanese Grand Prix · Grand Prix | Suzuki | 13 | | Classified |
| 1991 | Australian Grand Prix · Grand Prix | Suzuki | 11 | | Classified |
| 1991 | Malaysian Grand Prix · Grand Prix | Suzuki | 5 | | Classified |
| 1993 | Japanese motorcycle Grand Prix · Grand Prix | Yamaha | 9 | | Classified |