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R39
Model Documentation
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 W175 |
| Generator | Bosch magneto/generator, G 6V |
| Capacities & Measurements | |
| Weight | 110kg |
| Fuel | 10l |
| Wheelbase | 1410mm |
| Top Speed | 100kph |
| Number Produced | 855 |
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.
The information provided here was obtained from a variety
of public sources and may not reflect official BMW archival data.
Please contact the BMW Archives for official data
regarding models.