BMW R 57
| 'BMW R 57' | |
| Manufacturer | [[BMW]] |
|---|---|
| Production | 1928 |
| Class | [[:Category:Classic motorcycles|Classic]] [[Category:Classic motorcycles]] |
| Engine | air-cooled, four-stroke, twin cylinder, SV |
| Bore / Stroke | 68.6mm x 68.6mm |
| Compression ratio | 5.8:1 |
| Horsepower | 17.97 HP (13.4 KW) @ 4000RPM |
| Transmission | Gear box: 3-speed, manual Final Drive: shaft |
| Suspension | Front: plate spring fork Rear: hard-tail, sprung seat |
| Brakes | Front: 200mm drum Rear: block brake |
| Front Tire | 26 x 3.5 |
| Rear Tire | 26 x 3.5 |
| Weight | 150.0 kg (wet) |
| Manuals | Service Manual |
The BMW R 57 was a air-cooled, four-stroke, twin cylinder, SV Classic motorcycle produced by BMW in 1928. Claimed horsepower was 17.97 HP (13.4 KW) @ 4000 RPM.
Engine
A 68.6mm bore x 68.6mm stroke result in a displacement of just 494.0 cubic centimeters.
Drive
The bike has a 3-speed, manual transmission. Power was moderated via the dry, single plate.
Chassis
It came with a 26 x 3.5 front tire and a 26 x 3.5 rear tire. Stopping was achieved via 200mm drum in the front and a block brake in the rear. The front suspension was a plate spring fork while the rear was equipped with a hard-tail, sprung seat.
1928 - 1930 BMW R 57
The 1928 BMW R 57 has, at its heart, an air-cooled, four-stroke, 494cc, twin cylinder powerplant paired to a four-speed manual transmission and can reach a maximum power output of 18 horsepower at 4000 rpm. This classic machine from the House of Munich had standard fittings such as a plate spring front fork, a rigid rear suspension with a sprung single seat, a rear luggage rack, a small headlamp, laced wheels, a center stand, a front drum brake coupled to a block brake in the rear and a 12-liter (3.3-gallon) fuel tank.