| 1981 | Gran Premio delle Nazioni · Grand Prix | Suzuki | 20 | | Classified |
| 1982 | Austrian Grand Prix · Grand Prix | Suzuki | — | | Ret |
| 1982 | French Grand Prix · Grand Prix | Suzuki | 16 | | Classified |
| 1982 | Spanish Grand Prix · Grand Prix | Suzuki | — | | Ret |
| 1982 | British Grand Prix · Grand Prix | Suzuki | — | | Ret |
| 1982 | San Marino Grand Prix · Grand Prix | Suzuki | — | | Ret |
| 1983 | Nations Grand Prix · Grand Prix | Suzuki | 16 | | Classified |
| 1984 | Italian Grand Prix · Grand Prix | Honda | 20 | | Classified |
| 1984 | Spanish Grand Prix · Grand Prix | Honda | 17 | | Classified |
| 1984 | Austrian Grand Prix · Grand Prix | Honda | 19 | | Classified |
| 1984 | German Grand Prix · Grand Prix | Honda | 29 | | Classified |
| 1984 | San Marino Grand Prix · Grand Prix | Honda | — | | Ret |
| 1985 | German Grand Prix · Grand Prix | Suzuki | 26 | | Classified |
| 1985 | Italian Grand Prix · Grand Prix | Suzuki | 20 | | Classified |
| 1985 | Yugoslavian Grand Prix · Grand Prix | Suzuki | 19 | | Classified |
| 1985 | Dutch TT · Grand Prix | Suzuki | 18 | | Classified |
| 1985 | Belgian Grand Prix · Grand Prix | Suzuki | 25 | | Classified |
| 1985 | British Grand Prix · Grand Prix | Suzuki | — | | DNQ |
| 1985 | San Marino Grand Prix · Grand Prix | Suzuki | 19 | | Classified |
| 1986 | Italian Grand Prix · Grand Prix | Honda | 10 | | Classified |
| 1986 | Yugoslavian Grand Prix · Grand Prix | Honda | 16 | | Classified |
| 1987 | German Grand Prix · Grand Prix | Honda | 18 | | Classified |
| 1987 | Italian Grand Prix · Grand Prix | Honda | 16 | | Classified |
| 1987 | Dutch TT · Grand Prix | Honda | — | | DNS |
| 1987 | San Marino Grand Prix · Grand Prix | Honda | 17 | | Classified |
| 1988 | Spanish Grand Prix · Grand Prix | Honda | — | | Ret |
| 1988 | Expo 92 Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1988 | Italian Grand Prix · Grand Prix | Honda | 24 | | Classified |
| 1988 | German Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1988 | Austrian Grand Prix · Grand Prix | Honda | — | | Ret |
| 1988 | Dutch TT · Grand Prix | Honda | 14 | | Classified |
| 1988 | Belgian Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1988 | Yugoslavian Grand Prix · Grand Prix | Honda | — | | Ret |
| 1988 | French Grand Prix · Grand Prix | Honda | 18 | | Classified |
| 1988 | British Grand Prix · Grand Prix | Honda | — | | Ret |
| 1988 | Czechoslovak Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1989 | Spanish Grand Prix · Grand Prix | Paton | — | | Ret |
| 1989 | Nations Grand Prix · Grand Prix | Paton | — | | Ret |
| 1989 | German Grand Prix · Grand Prix | Paton | — | | DNQ |
| 1989 | Yugoslavian Grand Prix · Grand Prix | Paton | 17 | | Classified |
| 1989 | Dutch TT · Grand Prix | Paton | 20 | | Classified |
| 1989 | Belgian Grand Prix · Grand Prix | Paton | 18 | | Classified |
| 1989 | French Grand Prix · Grand Prix | Paton | — | | Ret |
| 1989 | British Grand Prix · Grand Prix | Paton | 16 | | Classified |
| 1989 | Czechoslovak Grand Prix · Grand Prix | Paton | — | | Ret |
| 1990 | Nations Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1990 | German Grand Prix · Grand Prix | Honda | 11 | | Classified |
| 1990 | Austrian Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1990 | Yugoslavian Grand Prix · Grand Prix | Honda | 6 | | Classified |
| 1990 | Dutch TT · Grand Prix | Honda | 14 | | Classified |
| 1990 | Belgian Grand Prix · Grand Prix | Honda | — | | Ret |
| 1990 | French Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1990 | British Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1990 | Swedish Grand Prix · Grand Prix | Honda | 11 | | Classified |
| 1990 | Czechoslovak Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1990 | Hungarian Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1990 | Australian Grand Prix · Grand Prix | Honda | 10 | | Classified |
| 1991 | Spanish Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1991 | Italian Grand Prix · Grand Prix | Honda | 11 | | Classified |
| 1991 | Austrian Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1991 | European Grand Prix · Grand Prix | Honda | — | | Ret |
| 1991 | French Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1991 | British Grand Prix · Grand Prix | Honda | 10 | | Classified |
| 1991 | San Marino Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1991 | Vitesse du Mans Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1991 | Malaysian Grand Prix · Grand Prix | Honda | 9 | | Classified |
| 1992 | Australian Grand Prix · Grand Prix | Librenti | — | | Ret |
| 1992 | Malaysian Grand Prix · Grand Prix | Librenti | — | | Ret |
| 1992 | Spanish Grand Prix · Grand Prix | Librenti | 24 | | Classified |
| 1992 | Italian Grand Prix · Grand Prix | Librenti | — | | Ret |
| 1992 | European Grand Prix · Grand Prix | Librenti | 22 | | Classified |
| 1992 | German Grand Prix · Grand Prix | Librenti | — | | Ret |
| 1992 | Dutch TT · Grand Prix | Librenti | 18 | | Classified |
| 1992 | French Grand Prix · Grand Prix | Librenti | 18 | | Classified |
| 1992 | British Grand Prix · Grand Prix | Librenti | 16 | | Classified |
| 1992 | Brazilian Grand Prix · Grand Prix | Librenti | 17 | | Classified |
| 1992 | South African Grand Prix · Grand Prix | Librenti | 16 | | Classified |
| 1994 | Australian motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | Malaysian motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | Spanish motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | Austrian motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | German motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | Czech Republic motorcycle Grand Prix · Grand Prix | ROC-Yamaha | 19 | | Classified |
| 1994 | United States motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | Argentine motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1994 | European motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1995 | French motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1995 | British motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1995 | Czech Republic motorcycle Grand Prix · Grand Prix | ROC-Yamaha | 23 | | Classified |
| 1995 | Rio de Janeiro motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1995 | Argentine motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1995 | European motorcycle Grand Prix · Grand Prix | ROC-Yamaha | — | | Ret |
| 1996 | Italian motorcycle Grand Prix · Grand Prix | ROC-Yamaha | 19 | | Classified |
| 1996 | City of Imola motorcycle Grand Prix · Grand Prix | ROC-Yamaha | 18 | | Classified |