BMW R39 (1925-27)

Make Model: BMW R 39


Year: 1925-27
Engine: Four stroke, single cylinder vertical, OHV
Capacity: 247 cc / 15.1 cu in.
Compression Ratio: 6.0:1
Cooling System: Air cooled
Induction: 1 x BMW Spezial 20 mm
Ignition: Bosch magneto generator type G 1.8V/15W
Starting: Kick
Clutch: Single plate, dry
Max Power: 4.8 kW / 6.5 hp @ 4000 rpm
Transmission: 3 Speed
Final Drive: Shaft
Frame: Twin loop tubular frame
Front Suspension: Plate spring, 4 laminae
Rear Suspension: Rigid, spring loaded saddle
Front Brakes: Internal shoe drum brake 150 mm / 5.90 in diameter
Rear Brakes: External shoe brake at the gearing on Cardan shaft
Front Tyre: 27 x 3.5″ balloon or with 26 x 3.0″ high pressure tyres
Rear Tyre: 27 x 3.5″ balloon or with 26 x 3.0″ high pressure tyres
Wet-Weight: 110 kg / 242 lbs
Fuel Capacity: 10 liters / 2.6 US gal


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