| 1988 | Dutch TT · Grand Prix | Honda | — | | Ret |
| 1988 | Belgian Grand Prix · Grand Prix | Honda | 15 | | Classified |
| 1989 | Dutch TT · Grand Prix | Honda | 15 | | Classified |
| 1989 | Belgian Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1989 | French Grand Prix · Grand Prix | Honda | 25 | | Classified |
| 1989 | British Grand Prix · Grand Prix | Honda | — | | Ret |
| 1989 | Czechoslovak Grand Prix · Grand Prix | Honda | — | | Ret |
| 1990 | Spanish Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1990 | Nations Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1990 | German Grand Prix · Grand Prix | Honda | 10 | | Classified |
| 1990 | Austrian Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1990 | Yugoslavian Grand Prix · Grand Prix | Honda | 7 | | Classified |
| 1990 | Dutch TT · Grand Prix | Honda | 13 | | Classified |
| 1990 | Belgian Grand Prix · Grand Prix | Honda | 15 | | Classified |
| 1990 | French Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1990 | British Grand Prix · Grand Prix | Honda | — | | Ret |
| 1990 | Swedish Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1990 | Czechoslovak Grand Prix · Grand Prix | Honda | 16 | | Classified |
| 1990 | Hungarian Grand Prix · Grand Prix | Honda | 16 | | Classified |
| 1990 | Australian Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1991 | Japanese Grand Prix · Grand Prix | Honda | 22 | | Classified |
| 1991 | Australian Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1991 | United States Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1991 | Spanish Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1991 | Italian Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1991 | German Grand Prix · Grand Prix | Honda | 11 | | Classified |
| 1991 | European Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1991 | Dutch TT · Grand Prix | Honda | 13 | | Classified |
| 1991 | French Grand Prix · Grand Prix | Honda | 12 | | Classified |
| 1991 | British Grand Prix · Grand Prix | Honda | 14 | | Classified |
| 1991 | San Marino Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1991 | Czechoslovak Grand Prix · Grand Prix | Honda | 13 | | Classified |
| 1991 | Vitesse du Mans Grand Prix · Grand Prix | Honda | — | | Ret |
| 1991 | Malaysian Grand Prix · Grand Prix | Honda | 10 | | Classified |
| 1992 | Australian Grand Prix · Grand Prix | Yamaha | 17 | | Classified |
| 1992 | Malaysian Grand Prix · Grand Prix | Yamaha | 12 | | Classified |
| 1992 | Spanish Grand Prix · Grand Prix | Yamaha | 17 | | Classified |
| 1992 | Italian Grand Prix · Grand Prix | Yamaha | 19 | | Classified |
| 1992 | European Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1992 | German Grand Prix · Grand Prix | Yamaha | 19 | | Classified |
| 1992 | Dutch TT · Grand Prix | Yamaha | 12 | | Classified |
| 1992 | Hungarian Grand Prix · Grand Prix | Yamaha | 17 | | Classified |
| 1992 | French Grand Prix · Grand Prix | Yamaha | 13 | | Classified |
| 1992 | British Grand Prix · Grand Prix | Yamaha | 15 | | Classified |
| 1992 | Brazilian Grand Prix · Grand Prix | Yamaha | 22 | | Classified |
| 1992 | South African Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1993 | Australian motorcycle Grand Prix · Grand Prix | Yamaha | 21 | | Classified |
| 1993 | Malaysian motorcycle Grand Prix · Grand Prix | Yamaha | 19 | | Classified |
| 1993 | Japanese motorcycle Grand Prix · Grand Prix | Yamaha | 23 | | Classified |
| 1993 | Spanish motorcycle Grand Prix · Grand Prix | Yamaha | 16 | | Classified |
| 1993 | Austrian motorcycle Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1993 | German motorcycle Grand Prix · Grand Prix | Yamaha | 20 | | Classified |
| 1993 | Dutch TT · Grand Prix | Yamaha | 21 | | Classified |
| 1993 | European motorcycle Grand Prix · Grand Prix | Yamaha | 14 | | Classified |
| 1993 | San Marino motorcycle Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1993 | British motorcycle Grand Prix · Grand Prix | Yamaha | 19 | | Classified |
| 1993 | Czech Republic motorcycle Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1993 | Italian motorcycle Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1993 | United States motorcycle Grand Prix · Grand Prix | Yamaha | — | | Ret |
| 1993 | FIM motorcycle Grand Prix · Grand Prix | Yamaha | 21 | | Classified |
| 1994 | Australian motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 25 | | Classified |
| 1994 | Malaysian motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 19 | | Classified |
| 1994 | Japanese motorcycle Grand Prix · Grand Prix | Harris-Yamaha | — | | Ret |
| 1994 | Spanish motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 19 | | Classified |
| 1994 | Austrian motorcycle Grand Prix · Grand Prix | Harris-Yamaha | — | | Ret |
| 1994 | German motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 18 | | Classified |
| 1994 | Dutch TT · Grand Prix | Harris-Yamaha | 18 | | Classified |
| 1994 | Italian motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 21 | | Classified |
| 1994 | French motorcycle Grand Prix · Grand Prix | Harris-Yamaha | — | | Ret |
| 1994 | British motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 21 | | Classified |
| 1994 | Czech Republic motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 20 | | Classified |
| 1994 | United States motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 20 | | Classified |
| 1994 | Argentine motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 18 | | Classified |
| 1994 | European motorcycle Grand Prix · Grand Prix | Harris-Yamaha | 19 | | Classified |
| 1995 | Dutch TT · Grand Prix | Harris-Yamaha | — | | Ret |