| 1985 | South African Grand Prix · Grand Prix | Suzuki | 8 | | Classified |
| 1985 | Spanish Grand Prix · Grand Prix | Suzuki | 9 | | Classified |
| 1985 | German Grand Prix · Grand Prix | Suzuki | 9 | | Classified |
| 1985 | Italian Grand Prix · Grand Prix | Suzuki | — | | DNF |
| 1985 | Austrian Grand Prix · Grand Prix | Suzuki | — | | DNF |
| 1985 | Yugoslavian Grand Prix · Grand Prix | Suzuki | 11 | | Classified |
| 1985 | Dutch TT · Grand Prix | Suzuki | — | | DNF |
| 1985 | Belgian Grand Prix · Grand Prix | Suzuki | 15 | | Classified |
| 1985 | French Grand Prix · Grand Prix | Suzuki | 7 | | Classified |
| 1985 | British Grand Prix · Grand Prix | Suzuki | — | | DNF |
| 1985 | Swedish Grand Prix · Grand Prix | Suzuki | — | | DNF |
| 1985 | San Marino Grand Prix · Grand Prix | Suzuki | 11 | | Classified |
| 1990 | Japanese Grand Prix · Grand Prix | Honda | 5 | | Classified |
| 1990 | United States Grand Prix · Grand Prix | Honda | — | | Ret |
| 1990 | Spanish Grand Prix · Grand Prix | Honda | 6 | | Classified |
| 1990 | Nations Grand Prix · Grand Prix | Honda | 6 | | Classified |
| 1990 | German Grand Prix · Grand Prix | Honda | 5 | | Classified |
| 1990 | Austrian Grand Prix · Grand Prix | Honda | 6 | | Classified |
| 1990 | Yugoslavian Grand Prix · Grand Prix | Honda | — | | Ret |
| 1990 | Czechoslovak Grand Prix · Grand Prix | Honda | 7 | | Classified |
| 1990 | Hungarian Grand Prix · Grand Prix | Honda | 10 | | Classified |
| 1990 | Australian Grand Prix · Grand Prix | Honda | 7 | | Classified |
| 1991 | Japanese Grand Prix · Grand Prix | Honda | 8 | | Classified |
| 1991 | Australian Grand Prix · Grand Prix | Honda | — | | Ret |
| 1991 | United States Grand Prix · Grand Prix | Honda | — | | Ret |
| 1991 | European Grand Prix · Grand Prix | Honda | 11 | | Classified |
| 1991 | Dutch TT · Grand Prix | Honda | 10 | | Classified |
| 1991 | French Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1991 | British Grand Prix · Grand Prix | Honda | — | | Ret |
| 1991 | San Marino Grand Prix · Grand Prix | Honda | — | | Ret |
| 1991 | Czechoslovak Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1991 | Vitesse du Mans Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1991 | Malaysian Grand Prix · Grand Prix | Honda | — | | Ret |