BMW R 50-5: history, specs, pictures

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BMW R 50-5
Production 1970 - 1972
two cylinder boxer, four-stroke
Bore / Stroke 67.0mm x 70.6mm
Top Speed 94 mph (151 km/h)
Horsepower 31.38 HP (23.4 KW) @ 6400RPM
Transmission Gear box: 4-speed
Final Drive: shaft drive (cardan)
Brakes Front: expanding brake
Rear: expanding brake
Front Tire 3.25-19
Rear Tire 4.00-18
Weight 222.0 kg (wet)
Fuel Capacity 6.34 Gallon (24.00 Liters)
Manuals Service Manual

The BMW R 50-5 was a two cylinder boxer, four-stroke standard produced by BMW between 1970 and 1972. It could reach a top speed of 94 mph (151 km/h). Claimed horsepower was 31.38 HP (23.4 KW) @ 6400 RPM.


The engine was a air cooled two cylinder boxer, four-stroke. A 67.0mm bore x 70.6mm stroke result in a displacement of just 498.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).


The bike has a 4-speed transmission.


It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The R 50-5 was fitted with a 6.34 Gallon (24.00 Liters) fuel tank.