1938 BMW R51
| 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, Four-stroke two cylinder flat twin 68.0 x 68.0 mm (2.67 x 2.87 inches) 494 cc OHV 6.7:1 24 hp @ 5600 rpm 2 x carburettor type Amal 5/423 4-speed (foot shifting) Cardan Single plate saucer spring, dry Magneto ignition Kick starter Forced feed lubrication Bosch W 225 T1 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) | Closed double steel tubular frame 2130 mm (83.85 inches) 960 mm (32.08 inches) 960 mm (37.79 inches) 1400mm (55.11 inches) 850 mm (33.50 inches) 165 mm (6.49 inches) 182 kg 14 litres Telescopic fork Telescopic suspension 3.25 R19 4.00 R18 Drum brake 200 mm / 7.87 in diameter duplex full hub Drum brake 200 mm / 7.87 in diameter simplex full hub |
Image: http://www.bmbikes.co.uk
