|Bore x Stroke (mm)||68 x 68|
|HP @ RPM||6.5 @ 4000|
|Valves||OHV, 2 per cylinder|
|Clutch||Dry, single plate, cable operated|
|Transmission||3 speed, hand shifted|
|Frame||Tubular double loop, brazed|
|Front Suspension||Undamped, trailing link, dual leaf spring|
|Front Brakes||150mm drum, single leading shoe|
|Rear Brakes||Contracting shoes on driveshaft mounted drum, heel operated|
|Spark Plugs||Bosch M175|
|Generator||Bosch magneto/generator, 6V|
|Capacities & Measurements|
BMW's first single. In order to attract buyers at the lower end of the price scale, BMW introduced the R39 single. Unfortunately, design problems with the single piece upper crankcase half/cylinder, which was alloy and had a shrunk in iron liner, meant that BMW had to remove the bike from the market after a short run.
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.