hd 125 zeffiro

1959 aermacchi hd 125 zeffiro Technical Analysis & Specification Breakdown

Engineered by aermacchi for the scooter motorcycle segment, the 1959 aermacchi hd 125 zeffiro pairs a 123 cc (7.5 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 5 HP (3.6 kW) at 4,500 rpm, transferring power to the rear wheel through a 3-speed gearbox. With a specific output of 40.7 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the hd 125 zeffiro measures 92 kg (203 lbs) dry, translating to a power-to-weight ratio of 0.05 HP/kg (18.4 kg per horsepower). The 6.5-liter (1.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 78 km/h (48 mph).

Within MotoLibrary's aermacchi archive, this model family spans 6 indexed model years from 1955 to 1960, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.