BMW R 2 Series 1: history, specs, pictures

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BMW R 2 Series 1
Production 1931
single cylinder, four-stroke
Bore / Stroke 63.0mm x 64.0mm
Top Speed 59 mph (95 km/h)
Horsepower 5.9 HP (4.4 KW) @ 3500RPM
Fuel System carburetor. sum carburetor 19 mm
Ignition battery ignition
Transmission Gear box: 3-speed

Final Drive: shaft drive (cardan)

Clutch: single-plate, dry
Suspension Front: cantilever spring, 9 laminae
Rear: rigit
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 3.00-25
Rear Tire 3.00-25
Wheelbase 51.97 inches (1320 mm)
Length 76.77 inches (1950 mm)
Weight 268.96 pounds (122.0 Kg) (dry),
Fuel Capacity 2.91 Gallon (11.00 Liters)
Fuel Consumption 2.75 liters/100 km (36.4 km/l or 85.53 mpg)
Manuals Service Manual

The BMW R 2 Series 1 was a single cylinder, four-stroke standard produced by BMW in 1931. It could reach a top speed of 59 mph (95 km/h). Claimed horsepower was 5.9 HP (4.4 KW) @ 3500 RPM.


The engine was a air cooled single cylinder, four-stroke. A 63.0mm bore x 64.0mm stroke result in a displacement of just 198.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).


The bike has a 3-speed transmission. Power was moderated via the single-plate, dry.


It came with a 3.00-25 front tire and a 3.00-25 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a cantilever spring, 9 laminae while the rear was equipped with a rigit. The R 2 Series 1 was fitted with a 2.91 Gallon (11.00 Liters) fuel tank. The bike weighed just 268.96 pounds (122.0 Kg). The wheelbase was 51.97 inches (1320 mm) long.