Comparison of Harley-Davidson Hummer 1957 and Harley-Davidson Hummer 1956 [S]ave
| Attribute |  Harley-Davidson Hummer 1957 × | Harley-Davidson Hummer 1956 × |
|---|---|---|
| General | ||
| Production from (year) | 1957 | 1956 |
| Make | Harley-Davidson | Harley-Davidson |
| Model | Harley-Davidson Hummer | Harley-Davidson Hummer |
| Category | Naked bike | Naked bike |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Displacement (cm³) | 125 | 125 |
| Bore (mm) | 52 | 52 |
| Stroke (mm) | 58 | 58 |
| Ignition | - | Magneto |
| Compression | 6.6:1 | 6.6:1 |
| Chassis | ||
| Front suspension | Girder-rubber springs | Girder-rubber springs |
| Rear suspension | Rigid | Rigid |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Front tyre | 3.25-19 | 3.25-19 |
| Rear tyre | 3.25-19 | 3.25-19 |
| Seat | Single spring-mounted | Single spring-mounted |
| Wheels | Spoked | Spoked |
| Dimensions | ||
| Wheelbase (mm) | 1,300 | 1,300 |
| Dry weight (kg) | 77 | 77 |
| Performance | ||
| Top speed (km/h) | 80 | 80 |
| Fuel capacity (l) | 6.6 | 6.6 |
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