R71


Production Model Years
   1938 - 1941

Frame and Engine Numbers

   Frame numbers
    505001 - 515164
    703001 - 703511
    ———
   Engine numbers
    700005 - 702200
    703001 - 703511

Model Specifications
Drivetrain
Displacement745cc
Cylinders2
Bore x Stroke (mm)78 x 78
HP @ RPM22 @ 4600
Compression Ratio5.5:1
ValvesOHV, 2 per cylinder
ClutchDry, single plate, cable operated
Transmission4 speed, foot shifted
Final DriveDriveshaft
Running Gear
FrameTubular steel double cradle
Front SuspensionHydraulically damped telescopic fork
Rear SuspensionPlunger
Front Brakes200mm drum, single leading shoe
Rear Brakes200mm drum, single leading shoe
Electrical
IgnitionBattery/coil
Spark PlugsBosch W175
GeneratorBosch RD 45/6 6V 45/70W (early) RD 50/6 6V 50/75W (late)
Capacities & Measurements
Weight187kg
Fuel14l
Wheelbase1400mm
Top Speed125kph
Number Produced2706
First range of serial numbers produced in 1938-39, second in 1941. The 1941 motorcycles left the factory with matching engine and frame numbers.

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.