500 Cc Classification
| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
|---|---|---|---|---|---|---|
| 1 | Wayne Rainey | Yamaha | 32 | 49:14.411 | 1 | 20 |
| 2 | Michael Doohan | Honda | 32 | +2.549 | 3 | 17 |
| 3 | John Kocinski | Yamaha | 32 | +9.457 | 4 | 15 |
| 4 | Wayne Gardner | Honda | 32 | +24.437 | 2 | 13 |
| 5 | Kevin Schwantz | Suzuki | 32 | +29.177 | 6 | 11 |
| 6 | Eddie Lawson | Cagiva | 32 | +31.155 | 5 | 10 |
| 7 | Jean-Philippe Ruggia | Yamaha | 32 | +37.849 | 9 | 9 |
| 8 | Alex Barros | Cagiva | 32 | +59.646 | 7 | 8 |
| 9 | Adrien Morillas | Yamaha | 32 | +59.702 | 10 | 7 |
| 10 | Didier de Radiguès | Suzuki | 32 | +1:01.652 | 12 | 6 |
| 11 | Kevin Magee | Suzuki | 32 | +1:20.599 | 11 | 5 |
| 12 | Doug Chandler | Yamaha | 32 | +1:28.598 | 13 | 4 |
| 13 | Eddie Laycock | Yamaha | 31 | +1 lap | 15 | 3 |
| 14 | Cees Doorakkers | Honda | 30 | +2 laps | 16 | 2 |
| 15 | Steve Spray | Roton | 29 | +3 laps | 17 | 1 |
| 16 | Niggi Schmassman | Honda | 28 | +4 laps | 18 | |
| Ret | Juan Garriga | Yamaha | 13 | Retired | 8 | |
| Ret | Sito Pons | Honda | 12 | Retired | 14 | |
Read more about this topic: 1991 Australian Motorcycle Grand Prix