R37
Start of Production | 1925 |
Click to View Available Literature |
End of Production | 1926 | |
Numbers Produced | 152 | |
Price | 2,900 RM | |
Engine |
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Internal Designation | M 2 B 36 | |
Motor Type | Four-stroke two cylinder flat twin | |
Bore x Stroke | 68 x 68 mm (2.67 x 2.67 in) | |
Displacement | 494 cc | |
Max Power | 16 hp at 4,000 rpm | |
Compression Ratio | 6.2 : 1 | |
Valves | OHV | |
Carburation System | 1 carburettor Type BMW Spezial three valve 26 mm | |
Engine Lubricating System | Forced feed lubrication | |
Oil Pump | Gear pump | |
Power Transmission |
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Clutch | Single plate, dry | |
Number of Gears | 3 | |
Shifting | Manual | |
Gearbox Ratios | 2.27 / 1.50 / 1.08 | |
Rear Wheel Ratio | 1 : 4.41 (1 : 5.36 with sidecar) | |
Bevel/Crownwheel | 17 / 75 teeth (14/ 7 5 with sidecar) | |
Electrical System |
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Ignition System | Bosch magneto Ignition | |
Generator | Magneto generator on request | |
Spark Plugs | Bosch W 175 | |
Chassis |
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Designation | R37 | |
Frame | Twin loop tubular frame | |
Front wheel suspension | Twin cantilever spring | |
Rear wheel suspension | Rigid | |
Wheel rims | 26 x 2.5 | |
Tyres, Front | 26 x 3 | |
Tyres, Rear | 26 x 3 | |
Brakes, Front | Drum brake 150 mm / 5.90 indiameter | |
Brakes, Rear | Block brake | |
Dimensions / Weights |
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Length x Width x Height | 2100 x 800 x 950 mm (82.67 x 31.49 x 37.40 in) | |
Wheel Base | 1380 mm / 54.33 in | |
Fuel Tank Capacity | 14 litres / 3.07 gal / 3.69 gal US | |
Unladen Weight with Full Tank | 134 Kg / 295 lb (with original sidecar 184 Kg / 405 lb) | |
Fuel Consumption | Approx. 4 litres per 100 Km / 70 mpg / 58 mpg US | |
Oil Consumption | Approx. 3 litres per 1,000 Km | |
Top Speed | 115 Kph / 71 mph | |
Information kindly supplied by P.Hawksley