R61

R61
Production Model Years
   1938 - 1941

Frame and Engine Numbers

   Frame numbers
    505001 - 515164
    607001 - 607340
    ———
   Engine numbers
    603001 - 606080
    607001 - 607340

 

Model Documentation

 

Model Specifications

Drivetrain
Displacement600cc
Cylinders2
Bore x Stroke (mm)70 x 78
HP @ RPM18 @ 4800
Compression Ratio5.7:1
ValvesSidevalve, 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 W175T1
GeneratorBosch RD 45/6 6V 45/70W (early) RD 50/6 6V 50/75W (late)
Capacities & Measurements
Weight184kg
Fuel14l
Wheelbase1400mm
Top Speed115kph
Number Produced3747
Second range of frame and engine numbers were built in 1941 and came from the factory with matching 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.