1926 BMW R42
| 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 SV 4.9:1 12 hp @ 3400 rpm 1 carburettor, Type BMW Spezial 2 valve 22 mm 3-speed Cardan Single plate dry clutch Bosch magneto ignition Kick starter Lubrication by gear pump in 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 tubular frame 2100 mm (82.67 inches) 800 mm (31.49 inches) 950 mm (37.40 inches) 1410 mm (55.51 inches) 785 mm 185 mm (7.3 inches) 126 kg 14 litres Plate spring, 5 laminae Rigid 26 x 3.5 on 19 x 3 or 27 x 2.75 on 21 x 2.5 26 x 3.5 on 19 x 3 or 27 x 2.75 on 21 x 2.5 Drum brake 150 mm / 5.90 in diameter External shoe brake at the gearing on Cardan shaft |
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