Production Model Years
1929 - 1934
Frame and Engine Numbers
101 - 9891 / 60001 - 73985
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 (friction damping beginning with Series IV), 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 W175
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 112kph
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/R16 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:

 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

*) These motor numbers also correspond to the 1929 R62 engine numbers

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