BMW R57 (1928-30)

Make Model: BMW R 57


Year: 1928 – 30
Engine: Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder.
Capacity: 494 cc / 30.1 cu in.
Bore x Stroke: 68 x 68 mm
Compression Ratio: 5.8:1
Induction: 1 x Spezial two valve 24 mm carburetor
Ignition: Bosch high voltage magneto ignition
Starting: Kick
Clutch: Single plate, dry
Max Power: 13.4 kW / 18 hp @ 4000 rpm
Transmission: 3 Speed
Final Drive: Shaft
Gear Ratio: 1st 2.83 / 2nd 1.55 / 3rd 1.08
Frame: Twin loop steel tubular frame
Front Suspension: Plate spring, 6 laminae
Rear Suspension: Rigid
Front Brakes: 200mm Drum
Rear Brakes: Block brake
Front Tyre: 26 x 3.5″ low pressure or 26 x 3.5″ high pressure
Rear Tyre: 26 x 3.5″ low pressure or 26 x 3.5″ high pressure

Wet-Weight: 150 kg / 330 lb
Fuel Capacity: 12.5 liters / 3.3 US gal


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