Comparison of NSU 251 SS 1927 and Yamaha YDS 3 1966 [S]ave
| Attribute |  Yamaha YDS 3 1966 × |  NSU 251 SS 1927 × |
|---|---|---|
| General | ||
| Production from (year) | 1966 | 1927 |
| Make | Yamaha | NSU |
| Model | Yamaha YDS 3 | NSU 251 SS |
| Category | Sport | Sport |
| Engine and transmission | ||
| Engine type | Twin, two-stroke | Single cylinder, four-stroke |
| Fuel system | - | Carburettor |
| Displacement (cm³) | 246 | 247 |
| Power (kw) | 17.5 | 7.3 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 50 | 63 |
| Stroke (mm) | 56 | 80 |
| Gearbox | - | 3-speed |
| Clutch | Wet multiplate | - |
| Compression | 7.5:1 | - |
| Chassis | ||
| Front suspension | Telescopic-Hydraulic damping | - |
| Rear suspension | Swingarm-two shocks | - |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Front tyre | 3-18 | 2.50-26 |
| Rear tyre | 3-18 | 2.50-26 |
| Seat | - | Single |
| Wheels | - | Spoked |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Wheelbase (mm) | 1,318 | 1,330 |
| Dry weight (kg) | 156 | 110 |
| Power/weight ratio | 0.1122 | 0.0664 |
| Performance | ||
| Top speed (km/h) | 132 | 100 |
| Fuel capacity (l) | 11.36 | 7.75 |
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