| Year | Grand Prix | No. | Team | Maufacturer | Grid | Position | Pts Points |
|---|---|---|---|---|---|---|---|
| 1988 | United States Grand Prix | Marlboro Yamaha Team Agostini | Yamaha | 1 | 20 | ||
| 1989 | United States Grand Prix | Rothmans Kanemoto Honda | Honda | 6 | 3 | 15 | |
| 1990 | United States Grand Prix | Marlboro Team Roberts | Yamaha | DNS | 0 | ||
| 1991 | United States Grand Prix | Cagiva Corse | Cagiva | 5 | 5 | 11 | |
| Avg. | 5.5 | 3 | 15.3 |
