8000 - 8900 / 36000 - 36900
| Model Specifications |
| Drivetrain |
| Displacement |
247cc |
| Cylinders |
1 |
| Bore x Stroke (mm) |
68 x 68 |
| HP @ RPM |
6.5 @ 4000 |
| Compression Ratio |
6.0:1 |
| Valves |
OHV, 2 per cylinder |
| Clutch |
Dry, single plate, cable operated |
| Transmission |
3 speed, hand shifted |
| Final Drive |
Driveshaft |
| Running Gear |
| Frame |
Tubular double loop, brazed |
| Front Suspension |
Undamped, trailing link, dual leaf spring |
| Rear Suspension |
Rigid |
| Front Brakes |
150mm drum, single leading shoe |
| Rear Brakes |
Contracting shoes on driveshaft mounted drum, heel operated |
| Electrical |
| Ignition |
Bosch magneto |
| Spark Plugs |
Bosch M175 |
| Generator |
Bosch magneto/generator, 6V |
| Capacities & Measurements |
| Weight |
110kg |
| Fuel |
10l |
| Wheelbase |
1410mm |
| Top Speed |
100kph |
| Number Produced |
900 |
BMW's first single.
In order to attract buyers at the lower end of the price scale, BMW introduced the R39 single. Unfortunately, design problems with the single piece upper crankcase half/cylinder, which was alloy and had a shrunk in iron liner, meant that BMW had to remove the bike from the market after a short run.
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