BMW R 12 - 2 carburettor
Number sold 36.000 (single- and doublecarburettor-Version)
Price 1.630,- RM
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| Internal Designation | M 56 S 6 or 212 |
| Engine type | four-stroke two-cylinder flat-twin |
| Bore/stroke | 78 x 78 mm |
| Cubic capacity | 745 cm3 |
| Max power | 20 PS at 3400 rpm |
| Compression ratio | 5,2 : 1 |
| Valves per cylinder | sv |
| Carburation system | 2 Amal 6 / 406 / 407 |
| Engine lubrication | forced-feed lubrication |
| Oil pump | gear pump |
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| Power transmission | |
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| Clutch | double discs, dry |
| Number of gears | 4 |
| Shifting | manual |
| Gear ratios | 3,18 / 2,06 / 1,42 / 1,09 |
| Rear wheel ratio | 1 : 4,07 (sidecar 1 : 4,75) |
| Bevel/crown wheel | 14 / 57 teeth (sidecar 12 / 57) |
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| Electrical system | |
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| Alternator | Bosch B 245 RS 108 |
| Ignition | Magnet- or battery ignition |
| Spark plugs | Bosch M 175 T 1 or Bosch W 175 T 1 |
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| Suspension | |
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| Designation | F 66 |
| Type of frame | twin-loop pressed steel frame |
| Front suspension | telescopic fork |
| Rear suspension | rigid |
| wheel rims | 3 x 19 |
| Tyres front | 3,50 x 19 |
| Tyres rear | 3,50 x 19 |
| Brakes front | drum brakes, Ø 200 mm |
| Brakes rear | drum brakes, Ø 200 mm |
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| Dimensions and weights | |
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| Length x width x height | 2100 x 900 x 940 mm |
| Wheel base | 1380 mm |
| Tank capacity | 14 l |
| Unladen weight, full tank | ca. 185 kg |
| Load rating | 300 kg |
| Fuel consumption | 4 - 4,5 l / 100 km |
| Oil consumption | 1 - 2 l / 1000 km |
| Top speed | 120 km/h |
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