| Date | Track | Series / Event | Pos | Car |
| 1989 |
| 1989/03/26 | Suzuka (JAP) | World 250ccm Championship | 1 | Yamaha |
| 1989/04/16 | Laguna Seca, CA (USA) | World 250ccm Championship | 1 | Yamaha |
| 1990 |
| 1990/04/08 | Laguna Seca, CA (USA) | World 250ccm Championship | 1 | Yamaha |
| 1990/05/06 | Jerez (ESP) | World 250ccm Championship | 1 | Yamaha |
| 1990/05/20 | Misano (ITA) | World 250ccm Championship | 1 | Yamaha |
| 1990/06/30 | Assen (NLD) | World 250ccm Championship
Dutch 250ccm TT | 1 | Yamaha |
| 1990/07/07 | Spa (BEL) | World 250ccm Championship | 1 | Yamaha |
| 1990/09/02 | Hungaroring (HUN) | World 250ccm Championship | 1 | Yamaha |
| 1990/09/16 | Phillip Island (AUS) | World 250ccm Championship | 1 | Yamaha |
| 1991 |
| 1991/09/29 | Shah Alam (MAL) | World 500ccm Championship | 1 | Yamaha |
| 1992 |
| 1992/09/06 | Kyalami (ZA) | World 500ccm Championship | 1 | Yamaha |
| 1993 |
| 1993/09/12 | Laguna Seca, CA (USA) | World 500ccm Championship | 1 | Cagiva |
| 1994 |
| 1994/03/27 | Eastern Creek (AUS) | World 500ccm Championship | 1 | Cagiva |
