BMW R 4 (1932-37)

Make Model: BMW R 4


Year: 1932 – 37
Engine: Four stroke, single cylinder vertical
Capacity: 498 cc / 30.4 cu in.
Bore x Stroke: 84 x 78 mm
Compression Ratio: 5.7:1
Cooling System: Air cooled
Induction: 1 x carburetor type SUM CK 3/500 Fr
Ignition: Battery ignition
Starting: Kick
Generator: Bosch 6V/45W
Clutch: Single plate, dry
Max Power: 10.4 kW / 14hp @ 4000 rpm
Transmission: 4 Speed
Final Drive: Shaft
Gear Ratio: 1st 3.6 / 2nd 2.28 / 3rd 1.70 / 4th 1.30:1
Frame: Pressed steel duplex frame
Front Suspension: Plate spring, 9 laminae with 2 friction shock absorbers
Rear Suspension: Rigid, sping loaded saddle
Front Brake: 160mm Drum
Rear Brakes: 160mm Drum
Front Tyre: 3.50 x 26″ SS

Rear Tyre: 3.50 x 26″ SS
Wet-Weight: 137 kg / 302 lbs
Fuel Capacity: 12 L / 3.2 US gal


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