Comparison of Zündapp KS 125 Sport 1971 and Zweirad-Union RT 125 E [S]ave
| Attribute |  Zündapp KS 125 Sport 1971 × |  Zweirad-Union RT 125 E × |
|---|---|---|
| General | ||
| Production from (year) | 1971 | 1972 |
| Make | Zündapp | Zweirad-Union |
| Model | Zündapp KS 125 Sport | Zweirad-Union RT 125 E |
| Category | Super motard | Unspecified category |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Displacement (cm³) | 124 | 124 |
| Power (kw) | 10.9 | 12.4 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 54 | 54 |
| Stroke (mm) | 54 | 54 |
| Gearbox | 5-speed | 6-speed |
| Fuel control | Port control | Port control |
| Compression | 11.0:1 | 11.8:1 |
| Chassis | ||
| Front brakes | Expanding brake | Expanding brake |
| Rear brakes | Expanding brake | Expanding brake |
| Front tyre | 2.75-18 | 2.75-17 |
| Rear tyre | 3.25-18 | 3.00-17 |
| Dimensions | ||
| Kerb weight (kg) | 110 | 108 |
| Performance | ||
| Top speed (km/h) | 120 | 120 |
| Fuel capacity (l) | 12 | 10.5 |
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