BMW R39: history, specs, pictures
The BMW R39 was a single cylinder, four-stroke standard produced by BMW between 1926 and 1927. It could reach a top speed of 62 mph (100 km/h). Claimed horsepower was 5.9 HP (4.4 KW) @ 4000 RPM.
Manufacturer | BMW |
---|---|
Production | 1926 - 1927 |
Engine | single cylinder, four-stroke |
Bore / Stroke | 68.0mm x 68.0mm |
Top speed | 62 mph (100 km/h) |
Horse Power | 5.9 HP (4.4 KW) @ 4000RPM |
Fuel system | carburetor. 20mm bmw spezial |
Battery | 6.1:1 |
Transmission | Gear box: 3-speed Final Drive: shaft drive (cardan) |
Suspension | Front: leading link Rear: rigid |
Brakes | Front: expanding brake (drum brake) |
Front Tire | 3.5-27 |
Rear Tire | 3.5-27 |
Dimensions | L 80.71 inches (2050 mm) W 31.5 inches (800 mm) H 37.4 inches (950 mm) |
Weight | (dry), 110.0 kg (wet) |
Manuals | Service Manual |
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Engine
The engine was a air cooled single cylinder, four-stroke. A 68.0mm bore x 68.0mm stroke result in a displacement of just 247.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).
Drive
The bike has a 3-speed transmission. Power was moderated via the dry-single plate-cable operated.
Chassis
It came with a 3.5-27 front tire and a 3.5-27 rear tire. The front suspension was a leading link while the rear was equipped with a rigid.