| 1 | 1989 | British Grand Prix | 53 | Marlboro Yamaha Team Agostini | Yamaha YZR | Yamaha | 5 | 8 |
| 2 | 1993 | Australian Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 10 | 8 |
| 3 | 1993 | Spanish Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 4 | 5 |
| 4 | 1993 | Austrian Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 9 | 5 |
| 5 | 1993 | German Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 11 | 8 |
| 6 | 1993 | Dutch TT | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 9 | 7 |
| 7 | 1993 | European Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 6 | 15 |
| 8 | 1993 | San Marino Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 10 | 5 |
| 9 | 1993 | British Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 2 | 1 |
| 10 | 1993 | Czech Republic Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 4 | 2 |
| 11 | 1993 | Italian Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 1 |
| 12 | 1993 | United States Grand Prix | 7 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 5 | 3 |
| 13 | 1994 | Australian Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 2 | 2 |
| 14 | 1994 | Malaysian Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 2 | 4 |
| 15 | 1994 | Japanese Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 4 |
| 16 | 1994 | Dutch TT | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 11 | 9 |
| 17 | 1994 | Italian Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 2 |
| 18 | 1994 | French Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 2 | 7 |
| 19 | 1994 | British Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 3 |
| 20 | 1994 | Czech Republic Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 3 |
| 21 | 1994 | United States Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 1 |
| 22 | 1994 | Argentinian Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 6 |
| 23 | 1994 | European Grand Prix | 5 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 1 | 1 |
| 24 | 1995 | Australian Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 3 | 4 |
| 25 | 1995 | Japanese Grand Prix | 2 | Marlboro Team Roberts | Yamaha YZR | Yamaha V4 | 8 | 4 |
