BMW R 3
Number sold 740
Price 955,- RM
| Engine | |
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| internal designation | M 203/1 |
| engine type | four-stroke two-cylinder flat-twin |
| Bore/stroke | 68 x 84 mm |
| Cubic capacity | 305 cm3 |
| Max power | 11 PS at 4200 U /min |
| Compression ratio | 6,0 : 1 |
| Valves per cylinder | ohv |
| Carburation system | 1 carburettor Typ SUM CK 3/500 Fr |
| Engine lubrication | forced-feed lubrication |
| oil pump | gear pump |
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| Power transmission | |
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| Clutch | single discs, dry |
| Number of gears | 4 |
| shifting | manual |
| Gear ratios | 3,6 / 2,18 / 1,35 / 1,1 |
| Rear wheel ratio | 1 : 5,11 (with sidecar 1: 5,63) |
| Bevel/crown wheel | 9 / 46 teeth (with sidecar (8 / 45) |
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| Electrical system | |
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| Alternator | Bosch 6 V 45/70 Watt, |
| Ignition | battery ignition |
| Spark plugs | Bosch DM 175 T 1 |
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| Suspension | |
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| designation | 203/1 |
| Type of frame | Preßstahl-Doppelschleifenframe |
| Front suspension | cantilever spring, 9 laminae mit Reibungsstossdämpfer |
| Rear suspension | rigid |
| wheel rims | 2,50 x 19 |
| Tyres front | 26 x 3,50 Ballon |
| Tyres rear | 26 x 3,50 Ballon |
| Brakes front | drum brake |
| Brakes rear | drum brake |
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| Dimensions and weights | |
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| Length x width x height | 1980 x 850 x 950 mm |
| Wheel base | 1320 mm |
| Tank capacity | 12 l |
| Unladen weight, full tank | 149 kg |
| permitted loading | 200 kg |
| Fuel consumption | ca. 3 l / 100 km |
| oil consumption | ca. 1 - 2 l / 1000 km |
| Top speed | 100 km/h |
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