| Attribute | MuZ ETZ 251 (reduced effect) 1989 × | Jawa 250 Californian 1972 × |
|---|---|---|
| General | ||
| Production from (year) | 1989 | 1972 |
| Make | MuZ | Jawa |
| Model | MuZ ETZ 251 (reduced effect) | Jawa 250 Californian |
| Category | Unspecified category | Naked bike |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Displacement (cm³) | 243 | 249 |
| Power (kw) | 12.4 | 12 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 69 | 65 |
| Stroke (mm) | 65 | 75 |
| Gearbox | 5-speed | 4-speed |
| Fuel control | Port control | Port control |
| Compression | 10.0:1 | 7.8:1 |
| Chassis | ||
| Front brakes | Single disc | - |
| Rear brakes | Expanding brake | Expanding brake |
| Front tyre | 2.75-18 | 3.00-19 |
| Rear tyre | 110/80-16 | 3.25-19 |
| Dimensions | ||
| Kerb weight (kg) | 146 | 144 |
| Performance | ||
| Top speed (km/h) | 113 | 115 |
| Fuel capacity (l) | 17 | 15 |