1927 BMW R47
| Engine Engine type Bore x Stroke Displacement Valves Compression ratio Max Power Max Torque Fuel system Transmission Final drive Clutch Ignition type Starting system Lubrication Exhaust Spark plug Battery Gear ratios | Air-cooled, 4-stroke, two cylinder flat twin 68.0 x 68.0 mm (2.67 x 2.67 inches) 494 cc OHV 5.8:1 18 hp @ 4000 rpm 1 carburettor, Type BMW Spezial 2 valve 22 mm 3-speed Cardan Dry single plate, with diaphragm spring Bosch magneto ignition Kick starter Wet sump Bosch W 175 6 volt 12 amp hour |
| Dimensions Frame type Castor Overall length Overall width Overall height Wheelbase Seat height Ground clearance Dry weight Fuel capacity Colors Suspension (front) Suspension (rear) Tyre (front) Tyre (rear) Brake (front) Brake (rear) | Twin loop steel tubular frame 2100 mm (82.67 inches) 800 mm (31.49 inches) 950 mm (37.40 inches) 1410 mm (55.51 inches) 770 mm (30.3 inches) 130 mm (5.11 inches) 130 kg 14 litres Plate spring, 5 laminae Rigid 27 x 3.5 low pressure or 26 x 3 high pressure 27 x 3.5 low pressure or 26 x 3 high pressure Drum brake 150 mm / 5.90 in diameter External shoe brake at the gearing on Cardan shaft |
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