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BMW R 42 (1926-28) technical specifications

BMW R 42 technical specifications

BMW R 42 is produced in 1926-28. Engine is Four stroke, two cylinder horizontally opposed Boxer, pushrod operated, SV, displacement 494 cc / 30.1 cu in. , produces power 8.9kW / 12 hp @ 3400 rpm. BMW R 42 wet weight is 126 kg / 277 lbs. BMW R 42 has 2 photos.

Technical specifications

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Model: R 42
Years: 1926-28
Engine: Four stroke, two cylinder horizontally opposed Boxer, pushrod operated, SV
Capacity: 494 cc / 30.1 cu in.
Bore x Stroke: 68 x 68 mm
Compression Ratio: 4.9:1
Cooling System: Air cooled
Induction: 1 x BMW Spezial 2 valve, ∅22 mm
Ignition: Bosch magneto ignition
Starting: Kick
Clutch: Single plate saucer spring, dry
Max Power: 8.9kW / 12 hp @ 3400 rpm
Transmission: 3 Speed
Final Drive: Shaft
Gear Ratio: 1st 2.50 / 2nd 1.50 / 3rd 1.07:1
Frame: Twin loop steel tubular frame
Front Suspension: Plate spring, 5 laminae
Rear Suspension: Rigid, Spring loaded saddle
Front Brakes: ∅150mm Drum
Rear Brakes: External shoe brake at the gearing on Cardan shaft
Front Tyre: 27 x 3.5" low pressure or 26 x 3.0" high pressure
Rear Tyre: 27 x 3.5" low pressure or 26 x 3.0" high pressure
Wet-Weight: 126 kg / 277 lbs
Fuel Capacity: 14 liters / 3.6 US gal

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