| Grand Prix: | Malaysian |
| Flag: | Malaysia |
| Official Name: | Lucky Strike Malaysia Grand Prix[1] |
| Location: | Shah Alam Circuit |
| Course Mi: | 2.29 |
| Course Km: | 3.69 |
| Race No: | 15 |
| Season No: | 15 |
| Date: | 29 September |
| Year: | 1991 |
| Pole Rider 500: | John Kocinski |
| Pole Rider 500 Country: | USA |
| Pole Time 500: | 1:24.903 |
| Fast Rider 500: | John Kocinski |
| Fast Rider 500 Country: | USA |
| Fast Time 500: | 1:25.100 |
| First Rider 500: | John Kocinski |
| First Rider 500 Country: | USA |
| Second Rider 500: | Wayne Gardner |
| Second Rider 500 Country: | Australia |
| Third Rider 500: | Mick Doohan |
| Third Rider 500 Country: | Australia |
| Pole Rider 250: | Carlos Cardús |
| Pole Rider 250 Country: | Spain |
| Pole Time 250: | 1:27.594 |
| Fast Rider 250: | Luca Cadalora |
| Fast Rider 250 Country: | Italy |
| Fast Time 250: | 1:27.826 |
| First Rider 250: | Luca Cadalora |
| First Rider 250 Country: | Italy |
| Second Rider 250: | Carlos Cardús |
| Second Rider 250 Country: | Spain |
| Third Rider 250: | Helmut Bradl |
| Third Rider 250 Country: | Germany |
| Pole Rider 125: | Kazuto Sakata |
| Pole Rider 125 Country: | Japan |
| Pole Time 125: | 1:33.597 |
| Fast Rider 125: | Noboiuki Wakai |
| Fast Rider 125 Country: | Japan |
| Fast Time 125: | 1:33.172 |
| First Rider 125: | Loris Capirossi |
| First Rider 125 Country: | Italy |
| Second Rider 125: | Kazuto Sakata |
| Second Rider 125 Country: | Japan |
| Third Rider 125: | Noboiuki Wakai |
| Third Rider 125 Country: | Japan |
The 1991 Malaysian motorcycle Grand Prix was the last round of the 1991 Grand Prix motorcycle racing season. It took place on the weekend of 27–29 September 1991 at the Shah Alam circuit.
Wayne Rainey and Kevin Schwantz out with broken bones in pre-race practice: Schwantz with a broken hand, Rainey with a broken femur at the knee joint. Months of rehabilitation were required for Rainey to get range of motion back into the leg.[2]
John Kocinski on pole. Mick Doohan takes the start from Wayne Gardner and Kocinski.
Kocinski takes the lead from Gardner, with Doohan in 3rd looking like his set-up is wrong, his bike vibrating visibly.
Kocinski opens a large gap and wins. On the podium, Gardner and Doohan look at each other and simultaneously spray champagne on Kocinski, who runs off the stage in a panic. Kocinski is notorious for being obsessed with cleanliness.
The 1991 Malaysian motorcycle Grand Prix was the final race for Didier de Radigues and 2-times 250cc World Champion Sito Pons.
| Pos. | Rider | Team | Manufacturer | Time/Retired | Points | |||
|---|---|---|---|---|---|---|---|---|
| 1 |  John Kocinski | Marlboro Team Roberts | Yamaha | 50:05.945 | 20 | |||
| 2 |  Wayne Gardner | Rothmans Honda Team | Honda | +6.145 | 17 | |||
| 3 | Mick Doohan | Rothmans Honda Team | Honda | +21.070 | 15 | |||
| 4 |  Juan Garriga | Ducados Yamaha | Yamaha | +39.088 | 13 | |||
| 5 | Kevin Magee | Lucky Strike Suzuki | Yamaha | +41.520 | 11 | |||
| 6 |  Niall Mackenzie | Roberts B Team | Yamaha | +1:01.504 | 10 | |||
| 7 |  Adrien Morillas | Sonauto Yamaha Mobil 1 | Yamaha | +1:25.351 | 9 | |||
| 8 |  Didier de Radiguès | Lucky Strike Suzuki | Suzuki | +1:25.912 | 8 | |||
| 9 |  Marco Papa | Team Marco Papa | Honda | +2 Laps | 7 | |||
| 10 |  Cees Doorakkers | HEK-Baumachines | Honda | +2 Laps | 6 | |||
| 11 |  Hans Becker | Team Romero Racing | Yamaha | +2 Laps | 5 | |||
| 12 |  Eddie Laycock | Millar Racing | Yamaha | +2 Laps | 4 | |||
| 13 |  Josef Doppler | Doppler Racing | Yamaha | +3 Laps | 3 | |||
| 14 |  Nicholas Schmassman | Schmassman Technotron | Honda | +6 Laps | 2 | |||
| Ret | Sito Pons | Campsa Honda Team | Honda | Retirement | ||||
| Ret | Jean Philippe Ruggia | Sonauto Yamaha Mobil 1 | Yamaha | Retirement | ||||
| Ret | Doug Chandler | Roberts B Team | Yamaha | Retirement | ||||
| Sources:[3] | ||||||||