| Attribute | Velocette Mac 1958 × | Sparta SL 250 1955 × |
|---|---|---|
| General | ||
| Production from (year) | 1958 | 1955 |
| Make | Velocette | Sparta |
| Model | Velocette Mac | Sparta SL 250 |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 349 | 245 |
| Power (kw) | 13.1 | - |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 68 | 67 |
| Stroke (mm) | 96 | 70 |
| Gearbox | 4-speed | - |
| Fuel control | Overhead Valves (OHV) | - |
| Ignition | - | Magneto |
| Chassis | ||
| Front suspension | - | Telescopic |
| Rear suspension | - | Twin shock-Swingarm |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Diameter (mm) | 152 | 180 |
| Front tyre | - | 3.25-16 |
| Rear tyre | - | 3.25-16 |
| Seat | - | Single seat |
| Other | ||
| Starter | - | Kick |
| Performance | ||
| Fuel capacity (l) | - | 16 |