BMW R 37
Number sold 152
Price 2.900,- RM
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| Internal Designation | M 2 B 33 |
| Engine type | four-stroke two-cylinder flat-twin |
| bore x stroke | 68 x 68 mm |
| displacement | 494 cm3 |
| output | 16 PS at 4000 rpm |
| compression ratio | 6,2 : 1 |
| valves | ohv |
| carburetion system | 1 carburettor, Typ BMW Spezial three-valve 26 mm |
| engine lubricating | forced-feed lubrication |
| Oil pump | gear pump |
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| Power transmission | |
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| Clutch | single discs, dry |
| no. of gears | 3 |
| Shifting | manual |
| Gear ratios | 2,27 / 1,50 / 1,08 |
| rear wheel ratio | 1 : 4,41 (with sidecar 1 : 5,36) |
| bevel/crown wheel | 17 / 75 teeth (with sidecar 14 / 75 teeth) |
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| Electrical system | |
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| Alternator | magneto generator on request |
| Ignition | Bosch magneto ignition |
| Spark plugs | Bosch W 175 |
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| Suspension | |
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| Designation | R 37 |
| 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 Ø 150 mm |
| Brakes rear | block brake |
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| Dimensions and weights | |
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| Length x width x height | 2100 x 800 x 950 mm |
| Wheel base | 1380 mm |
| Tank capacity | 14 l |
| Unladen weight, full tank | 134 kg (with Original-sidecar 184 kg) |
| Load rating | k.A. |
| Fuel consumption | ca. 4 l / 100 km |
| Oil consumption | ca. 3 l / 1000 km |
| Top speed | 115 km/h |
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