| 1 | 1988 | British Grand Prix | 17 | Team Lucky Strike Roberts | Yamaha YZR | Yamaha | 5 | 1 |
| 2 | 1989 | United States Grand Prix | 3 | Team Lucky Strike Roberts | Yamaha YZR | Yamaha | 1 | 1 |
| 3 | 1989 | West Germany Grand Prix | 3 | Team Lucky Strike Roberts | Yamaha YZR | Yamaha | 2 | 1 |
| 4 | 1989 | Dutch TT | 3 | Team Lucky Strike Roberts | Yamaha YZR | Yamaha | 2 | 1 |
| 5 | 1990 | Japanese Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 1 | 1 |
| 6 | 1990 | United States Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 2 | 1 |
| 7 | 1990 | Nations Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 1 | 1 |
| 8 | 1990 | Yugoslavian Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 1 | 1 |
| 9 | 1990 | Belgium Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 2 | 1 |
| 10 | 1990 | Swedish Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 4 | 1 |
| 11 | 1990 | Czechoslovakian Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha | 3 | 1 |
| 12 | 1991 | Australian Grand Prix | 1 | Yamaha | Yamaha YZR | Yamaha | 1 | 1 |
| 13 | 1991 | United States Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 1 |
| 14 | 1991 | European Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | | 1 |
| 15 | 1991 | French Grand Prix | 1 | Yamaha | Yamaha YZR | Yamaha | 1 | 1 |
| 16 | 1991 | San Marino Grand Prix | 1 | Yamaha | Yamaha YZR | Yamaha | 3 | 1 |
| 17 | 1991 | Czechoslovakian Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 1 |
| 18 | 1992 | European Grand Prix | 1 | Yamaha | Yamaha YZR | Yamaha | 4 | 1 |
| 19 | 1992 | French Grand Prix | 1 | Yamaha | Yamaha YZR | Yamaha | 2 | 1 |
| 20 | 1992 | Brazilian Grand Prix | 1 | Yamaha | Yamaha YZR | Yamaha | 2 | 1 |
| 21 | 1993 | Malaysian Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 1 |
| 22 | 1993 | Japanese Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 1 |
| 23 | 1993 | European Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 1 |
| 24 | 1993 | Czech Republic Grand Prix | 1 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 1 |
