NSU 251 SS: history, specs, pictures
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| Manufacturer | NSU |
|---|---|
| Production | 1927 - 1929 |
| Engine | single cylinder, four-stroke |
| Bore / Stroke | 63.0mm x 80.0mm |
| Top speed | 62 mph (100 km/h) |
| Horse Power | 9.79 HP (7.3 KW) @ 4400RPM |
| Fuel system | carburettor |
| Transmission | Gear box: 3-speed Final Drive: chain |
| Brakes | Front: expanding brake (drum brake) Rear: expanding brake (drum brake) |
| Front Tire | 2.50-26 |
| Rear Tire | 2.50-26 |
| Wheelbase | 52.36 inches (1330 mm) |
| Weight | 242.51 pounds (110.0 Kg) |
| Fuel capacity | 2.05 Gallon (7.75 Liters) |
| Manuals | Service Manual |
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The NSU 251 SS was a single cylinder, four-stroke standard produced by NSU between 1927 and 1929. It could reach a top speed of 62 mph (100 km/h). Claimed horsepower was 9.79 HP (7.3 KW) @ 4400 RPM.
Engine
The engine was a air cooled single cylinder, four-stroke. A 63.0mm bore x 80.0mm stroke result in a displacement of just 247.0 cubic centimeters.
Drive
The bike has a 3-speed transmission.
Chassis
It came with a 2.50-26 front tire and a 2.50-26 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The 251 SS was fitted with a 2.05 Gallon (7.75 Liters) fuel tank. The bike weighed just 242.51 pounds (110.0 Kg). The wheelbase was 52.36 inches (1330 mm) long.