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R11
Model Documentation
- R11 Owners handbook for Series 2 (German language) (published 1930) (10.0 MB)
- R11 Owners handbook for Series 3 (German language) (published 1932) (11.2 MB)
- R11 Owners handbook for Series 5 (German language) (published 1934) (13.1 MB)
- R11 Owners handbook (German language) (published 1939) (12.3 MB)
- R11 parts manual (German language) (published 1930) (9.6 MB)
- R11 parts manual (German language) (published 1932) (13.1 MB)
- R11 parts manual (German language) (published 1934) (20.7 MB)
- R11 parts manual (German language) (published 1935) (19.3 MB)
- R11 parts manual (German language) (published 1936) (15.8 MB)
- R11 parts manual (German language) (published 1940) (12.3 MB)
- R11 parts manual (German language) (published 1942) (14.5 MB)
Model Specifications | |
|---|---|
| Drivetrain | |
| Displacement | 745cc |
| Cylinders | 2 |
| Bore x Stroke (mm) | 78 x 78 |
| HP @ RPM | 18 @ 3400 (Series I-IV) 20 @ 3400 (Series V - twin carburetor) |
| Compression Ratio | 5.5:1 |
| Valves | Sidevalve, 2 per cylinder |
| Clutch | Dry, dual plate, cable operated |
| Transmission | 3 speed, hand shifted |
| Final Drive | Driveshaft |
| Running Gear | |
| Frame | Pressed steel, rivetted |
| Front Suspension | Undamped, trailing link, leaf spring |
| Rear Suspension | Rigid |
| Front Brakes | 200mm drum, single leading shoe |
| Rear Brakes | Contracting shoe drum on driveshaft, heel operated |
| Electrical | |
| Ignition | Bosch magneto (Battery/coil or magneto option on Series V) |
| Spark Plugs | Bosch W175T1 |
| Generator | Bosch D2B L type magneto/generator, 6V 30/50W (Bosch B245 R generator, 6V 45/70W, standard, D2B R 6V 30/50W magneto/generator optional, on Series V) |
| Capacities & Measurements | |
| Weight | 162kg |
| Fuel | 14l |
| Wheelbase | 1380mm |
| Top Speed | 100kph (112kph Series V) |
| Number Produced | 7500 (all Series) |
With the purchase of the Dixi automobile works in Eisenach, Thuringia in 1928, BMW came into ownership of steel stamping machinery. This they put to use on the R11/[url=http://www.vintagebmw.org/v7/model/r16]R16[/url] models to eliminate the continuing problems with the old brazed tubular frames that had a tendency to crack, especially under hard sidecar usage.
Motor numbers are arranged into the model years and "Series Numbers" as follows:
*) These motor numbers also correspond to the 1929 R62 engine numbers
| Build Year | Series | Engine Numbers |
|---|---|---|
| 1929* | I | 60001 - 63988 |
| 1930 | I | 63989 - 64500 |
| 1931 | II | 65001 - 66946 |
| 1932 | III | 67501 - 68920 |
| 1933 | IV | 69001 - 70122 |
| 1934 | V | 70123 - 73985 |
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.