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R51
Model Documentation
- R51 Owners handbook (German language) (published 1938) (7.3 MB)
- R51 Owners handbook (English language) (published 1938) (5.5 MB)
- R51 Owners handbook (German language) (published 1939) (6.8 MB)
- R51 parts manual (German language) (published 1938) (14.1 MB)
- R51 parts manual (German language) (published 1939) (6.7 MB)
- R51 parts manual (German language) (published 1941) (1.7 MB)
- R51 parts manual (German language) (published 1942) (8.6 MB)
Model Specifications | |
|---|---|
| Drivetrain | |
| Displacement | 494cc |
| Cylinders | 2 |
| Bore x Stroke (mm) | 68 x 68 |
| HP @ RPM | 24 @ 5600 |
| Compression Ratio | 6.7:1 |
| Valves | OHV, 2 per cylinder |
| Clutch | Dry, single plate, cable operated |
| Transmission | 4 speed, foot shifted |
| Final Drive | Driveshaft |
| Running Gear | |
| Frame | Tubular steel double cradle |
| Front Suspension | Hydraulically damped telescopic fork |
| Rear Suspension | Plunger |
| Front Brakes | 200mm drum, single leading shoe |
| Rear Brakes | 200mm drum, single leading shoe |
| Electrical | |
| Ignition | Battery/coil |
| Spark Plugs | Bosch W225T1 |
| Generator | Bosch RD 45/6 6V 45/70W (early) RD 50/6 6V 50/75W (late) |
| Capacities & Measurements | |
| Weight | 182kg |
| Fuel | 15l |
| Wheelbase | 1400mm |
| Top Speed | 140kph |
| Number Produced | 3775 |
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.