Production Model Years
   1929 - 1934

Frame and Engine Numbers

   Frame numbers
    101 - 9891
   Engine numbers
    75001 - 76953

Model Specifications
Bore x Stroke (mm)83 x 68
HP @ RPM25 @ 4000 (Series I-II)
33 @ 4000 (Series III-V)
Compression Ratio6.5:1 (Series I-II), 7.0:1 (Series III-V)
ValvesOHV, 2 per cylinder
ClutchDry, dual plate, cable operated
Transmission3 speed, hand shifted
Final DriveDriveshaft
Running Gear
FramePressed steel, rivetted
Front SuspensionUndamped (friction damping beginning with Series IV), trailing link, leaf spring
Rear SuspensionRigid
Front Brakes200mm drum, single leading shoe
Rear BrakesContracting shoe drum on driveshaft, heel operated
IgnitionBosch magneto (Battery/coil or magneto option on Series V)
Spark PlugsBosch W175
GeneratorBosch D2B L type magneto/generator, 6V 30/50W (Bosch B245R generator, 6V 45/70W, standard, D2B R 6V 30/50W magneto/generator optional, on Series V)
Capacities & Measurements
Top Speed120kph (Series I-II), 126kph (Series III-V)
Number Produced1006 (all Series)

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.