Jupiter 3

1975 IZH Jupiter 3 Technical Analysis & Specification Breakdown

Built around IZH's classic motorcycle platform, the 1975 IZH Jupiter 3 utilizes a 347 cc (21.2 cu in) air-cooled twin, two-stroke layout. In factory specification, peak output is rated at 25 HP (18.2 kW) at 5,200 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 72 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the Jupiter 3 measures 171 kg (377 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.84 kg per horsepower). The 18-liter (4.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 120 km/h (75 mph).

Within MotoLibrary's IZH archive, this model family spans 3 indexed model years from 1973 to 1975, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.