Comparison of Aermacchi HD 125 Zeffiro 1960 and Hercules 311 1951 [S]ave
| Attribute |  Aermacchi HD 125 Zeffiro 1960 × |  Hercules 311 1951 × |
|---|---|---|
| General | ||
| Production from (year) | 1960 | 1951 |
| Make | Aermacchi | Hercules |
| Model | Aermacchi HD 125 Zeffiro | Hercules 311 |
| Category | Scooter | Sport |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor. DellÓrto | Carburettor. Bing 18mm |
| Displacement (cm³) | 123 | 123 |
| Power (kw) | 3.6 | 3.6 |
| Cooling system | Air | Air |
| Transmission type,final drive | - | Chain |
| Bore (mm) | 52 | 52 |
| Stroke (mm) | 58 | 58 |
| Clutch | Wet multiplate | - |
| Compression | 5.7:1 | - |
| Chassis | ||
| Front suspension | Telescopic | Telescopic |
| Rear suspension | - | Rigid |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Front tyre | 2.25-17 | 2.50-19 |
| Rear tyre | 2.25-17 | 2.50-19 |
| Seat | Two single seats | Single |
| Wheels | - | Spoked |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Dry weight (kg) | 92 | 90 |
| Power/weight ratio | 0.0391 | 0.04 |
| Performance | ||
| Top speed (km/h) | 78 | 75 |
| Fuel capacity (l) | 6.5 | - |
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