The 247 cc BMW R27, introduced in 1960, is a shaft-driven, single-cylinder motorcycle manufactured by BMW.After World War II, the Potsdam Agreement of the USSR, USA, and the UK, prohibited BMW Aktiengesellschaft (AG) from building motorcycles. Later, this ban was lifted and in 1948 BMW produced its first postwar motorcycle, the 250 cc R24, which was based largely on the prewar R23. It was the only postwar BMW motorcycle produced without a rear suspension. BMW introduced the R25 model, with plunger rear suspension, in 1950. The last of the plunger models, the R25/3, was introduced in 1953.
Based largely on the R26, in 1960 the R27 added rubber mounts for the engine and boosted power to 18 hp (13 kW). The 250 cc OHV vertical single was the only rubber-mounted thumper engine BMW ever produced, and was their last shaft drive single-cylinder motorcycle. The engine pumped out 18 hp (13 kW), the highest ever for a shaft-drive BMW single. BMW manufactured 15,364 R27 models (engine numbers 372 001 – 387 566 ) over the production years of 1960 to 1966. Some of the 1966 R27 models were sold as 1967 models because dealers in those years often would assign dates to BMW motorcycles when they sold them, and not necessarily when they were manufactured.
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| BMW R27 motorcycle Picture 1 |
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| BMW R27 motorcycle Picture 2 |
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| BMW R27 motorcycle Picture 3 |
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| BMW R27 motorcycle Picture 4 |
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| BMW R27 motorcycle Picture 5 |
| R27 |
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| Engine Numbers | 372 001 – 387 566 |
| Design | Single cylinder with driveshaft |
| Engine | 4-stroke, 2 OHV |
| Transmission | Four-speed, left foot |
| Model years | 1960–1966 |
| Number manufactured | 15,364 |
| Bore | 68 mm (2.7 in) |
| Stroke | 68 mm (2.7 in) |
| Capacity | 247 cc |
| Power | 18 hp (13 kW) @ 7400 rpm |
| Compression ratio | 8.2:1 |
| Fuel efficiency | 60.3 miles per US gallon (3.90 L/100 km; 72.4 mpg-imp) DIN 70030 |
| Maximum speed | 81 mph (130 km/h) / with side car 56 mph (90 km/h) |
| Wheelbase | 54.3 in (1,379 mm) |
| Curb weight | 357 lb (162 kg) |
| GVWR | 716 lb (325 kg) / with side car 1,058 lb (480 kg) |
| Tires front & rear | 3.25 x 18 |
| Battery | 6 volt, 9 Ah. |
| Tank capacity | 3.96 US gallon (15 liter) |
| Engine oil capacity | 2.6 US pint (1.2 liter) |
| Transmission capacity | 650 cc |
| Rear drive capacity | 125 cc |