| Race details | |||
|---|---|---|---|
| Race 12 of 15 races in the 1991 Grand Prix motorcycle racing season |
|||
| Date | August 18, 1991 | ||
| Location | Mugello | ||
| Course | Permanent racing facility 5.245 km (3.259 mi) |
||
| 500 cc | |||
| Pole position | |||
| Rider | Kevin Schwantz | ||
| Time | 1:54.276 | ||
| Fastest lap | |||
| Rider | Kevin Schwantz | ||
| Time | 1:54.461 | ||
| Podium | |||
| First | Wayne Rainey | ||
| Second | Kevin Schwantz | ||
| Third | Mick Doohan | ||
| 250 cc | |||
| Pole position | |||
| Rider | Helmut Bradl | ||
| Time | 1:58.492 | ||
| Fastest lap | |||
| Rider | Luca Cadalora | ||
| Time | 1:57.865 | ||
| Podium | |||
| First | Luca Cadalora | ||
| Second | Carlos Cardús | ||
| Third | Loris Reggiani | ||
| 125 cc | |||
| Pole position | |||
| Rider | Noboru Ueda | ||
| Time | 2:06.019 | ||
| Fastest lap | |||
| Rider | Peter Öttl | ||
| Time | 2:04.988 | ||
| Podium | |||
| First | Peter Öttl | ||
| Second | Loris Capirossi | ||
| Third | Fausto Gresini | ||
The 1991 San Marino motorcycle Grand Prix was the twelfth round of the 1991 Grand Prix motorcycle racing season. It took place on the weekend of 16th-18th August, 1991 at the Mugello Circuit.
5th pole of the season for Kevin Schwantz. Wayne Rainey gets the start from Wayne Gardner, Schwantz and Mick Doohan.
Rainey and Doohan get away, Doohan superior on the brakes at the end of the straight. Schwantz is a close 3rd.
Rainey drops Doohan, who is caught by Schwantz.
| Pos | Rider | Manufacturer | Time/Retired | Points |
|---|---|---|---|---|
| 1 | Wayne Rainey | Yamaha | 46:08.566 | 20 |
| 2 | Kevin Schwantz | Suzuki | +2.946 | 17 |
| 3 | Mick Doohan | Honda | +6.066 | 15 |
| 4 | Wayne Gardner | Honda | +23.218 | 13 |
| 5 | Niall Mackenzie | Yamaha | +33.205 | 11 |
| 6 | John Kocinski | Yamaha | +37.614 | 10 |
| 7 | Juan Garriga | Yamaha | +39.280 | 9 |
| 8 | Didier de Radiguès | Suzuki | +39.566 | 8 |
| 9 | Doug Chandler | Yamaha | +52.121 | 7 |
| 10 | Jean Philippe Ruggia | Yamaha | +1:15.609 | 6 |
| 11 | Eddie Laycock | Yamaha | +1 Lap | 5 |
| 12 | Marco Papa | Cagiva | +1 Lap | 4 |
| 13 | Cees Doorakkers | Honda | +1 Lap | 3 |
| 14 | Michael Rudroff | Honda | +1 Lap | 2 |
| 15 | Hans Becker | Yamaha | +1 Lap | 1 |
| 16 | Josef Doppler | Yamaha | +1 Lap | |
| 17 | Romolo Balbi | Honda | +1 Lap | |
| 18 | Andreas Leuthe | Suzuki | +2 Laps | |
| 19 | Helmut Schutz | Honda | +2 Laps | |
| Ret | Sito Pons | Honda | Retirement | |
| Ret | Michele Valdo | Paton | Retirement | |
| Ret | Eddie Lawson | Cagiva | Retirement | |
| Ret | Adrien Morillas | Yamaha | Retirement |
| Previous race: 1991 British Grand Prix |
FIM Grand Prix World Championship 1991 season |
Next race: 1991 Czechoslovakian Grand Prix |
| Previous race: 1987 San Marino Grand Prix |
San Marino Grand Prix | Next race: 1993 San Marino Grand Prix |