BMW R 57

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BMW R 57
Production 1928
Class Classic
air-cooled, four-stroke, twin cylinder, SV
Bore / Stroke 68.6mm x 68.6mm
Compression ratio 5.8:1
Horsepower 17.97 HP (13.4 KW) @ 4000RPM
Transmission Gear box: 3-speed, manual

Final Drive: shaft

Clutch: dry, single plate
Suspension Front: plate spring fork
Rear: hard-tail, sprung seat
Brakes Front: 200mm drum
Rear: block brake
Front Tire 26 x 3.5
Rear Tire 26 x 3.5
Weight 150.0 kg (wet)
Manuals Service Manual

The BMW R 57 was a air-cooled, four-stroke, twin cylinder, SV Classic motorcycle produced by BMW in 1928. Claimed horsepower was 17.97 HP (13.4 KW) @ 4000 RPM.


A 68.6mm bore x 68.6mm stroke result in a displacement of just 494.0 cubic centimeters.


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


It came with a 26 x 3.5 front tire and a 26 x 3.5 rear tire. Stopping was achieved via 200mm drum in the front and a block brake in the rear. The front suspension was a plate spring fork while the rear was equipped with a hard-tail, sprung seat.

1928 - 1930 BMW R 57[edit]

1928 - 1930 BMW R 57 1928 - 1930 BMW R 57 1928 - 1930 BMW R 57

The 1928 BMW R 57 has, at its heart, an air-cooled, four-stroke, 494cc, twin cylinder powerplant paired to a four-speed manual transmission and can reach a maximum power output of 18 horsepower at 4000 rpm. This classic machine from the House of Munich had standard fittings such as a plate spring front fork, a rigid rear suspension with a sprung single seat, a rear luggage rack, a small headlamp, laced wheels, a center stand, a front drum brake coupled to a block brake in the rear and a 12-liter (3.3-gallon) fuel tank.

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