Hummer
1955 Harley-Davidson Hummer Technical Analysis & Specification Breakdown
At the heart of the 1955 Harley-Davidson Hummer naked motorcycle, Harley-Davidson relies on a 125 cc (7.6 cu in) single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 52.0 x 58.0 mm (2.0 x 2.3 inches) with a 6.6:1 compression ratio.
On the scales, the Hummer measures 77.1 kg (170 lbs) dry. Rider ergonomics and chassis geometry center around a 1,300 mm (51.2 in) wheelbase engineered for quick, flickable steering geometry. The 6.6-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 81 km/h (50 mph).
Within MotoLibrary's Harley-Davidson archive, this model family spans 5 indexed model years from 1955 to 1959, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
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