| Attribute | Hercules K 103 1963 × | Vespa Circuito 1950 × |
|---|---|---|
| General | ||
| Production from (year) | 1963 | 1950 |
| Make | Hercules | Vespa |
| Model | Hercules K 103 | Vespa Circuito |
| Category | Sport | Scooter |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor. Bing 22mm | Carburettor |
| Displacement (cm³) | 97 | 125 |
| Power (kw) | 5.1 | - |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 48 | 56.5 |
| Stroke (mm) | 54 | 50 |
| Chassis | ||
| Front suspension | - | Coil springs |
| Rear suspension | Swingarm | Rubber stopper |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | Single cradle | - |
| Front tyre | 3-16 | 3.50-8 |
| Rear tyre | 3-16 | 3.50-8 |
| Seat | Dual | - |
| Wheels | Spoked | - |
| Performance | ||
| Top speed (km/h) | 90 | 100 |