The Harley-Davidson Hummer motorcycle specifications include a 125 cc (7.63 cu in) engine and a listed weight of 77.1 kg (170 lb).
Key specifications
1955-1959Model years
125 ccDisplacement
77.1 kgDry weight
6.6 LFuel tank
1,300 mmWheelbase
Model years covered
19551956195719581959
Year-specific specification changes
No material specification changes from the 1955 baseline were found in the available data.
How the Harley-Davidson Hummer compares
This compares the motorcycle with all Harley-Davidson models in this specifications database. The blue marker is this model and the grey line is the Harley-Davidson database average.
Displacement125 cc
Low 165 ccAverage 1,275 ccHigh 1,868 cc
About 90% lower than the Harley-Davidson database average. Around the 1st percentile across Harley-Davidson models.
Fuel capacity6.6 L
Low 7.9 LAverage 17 LHigh 22.7 L
About 61% smaller than the Harley-Davidson database average. Around the 1st percentile across Harley-Davidson models.
This model Harley-Davidson database average
Harley-Davidson database percentile rankings
Percentiles show where this motorcycle sits across the Harley-Davidson specifications database. They are descriptive database rankings, not performance ratings.
Displacement1st
125 cc — larger displacement than about 1% of Harley-Davidson models.
Fuel capacity1st
6.6 L — larger than about 1% of Harley-Davidson fuel tanks in this database.
Mechanical overview
Engine layout snapshot
Single cylinder, two-stroke • 125 cc
Chassis snapshot
Wheelbase 1,300 mm
3.25-19 front / 3.25-19 rear
Additional useful specifications
| Front tire size |
3.25-19 |
| Rear tire size |
3.25-19 |
| Bore/stroke ratio |
0.90:1 (Undersquare) |
Engine specifications
| Engine type |
Single cylinder, two-stroke |
| Displacement |
125 cc (7.63 cu in) |
| Bore × stroke |
52.0 x 58 mm (2.0 x 2.3 inches) |
| Compression ratio |
6.6:1 |
| Fuel system |
Carburettor |
| Ignition |
Magneto |
Chassis and suspension
| Front suspension |
Girder-rubber springs |
| Rear suspension |
Rigid |
Brakes, wheels and tires
| Front brakes |
Expanding brake (drum brake) |
| Rear brakes |
Expanding brake (drum brake) |
| Front tire |
3.25-19 |
| Rear tire |
3.25-19 |
| Wheels |
Spoked |
Dimensions and weight
| Dry weight |
77.1 kg (170 lb) |
| Wheelbase |
1,300 mm (51.2 inches) |
Fuel and emissions
| Fuel capacity |
6.60 L (1.74 US gal) |
Performance
| Top speed |
80.5 km/h (50.0 mph) |
Other specifications
| Seat |
Single spring-mounted |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Harley-Davidson models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Harley-Davidson information before relying on them. Visit the official Harley-Davidson website.