900 Z 1 Super 4

1973 Kawasaki 900 Z 1 Super 4 Technical Analysis & Specification Breakdown

Built around Kawasaki's classic motorcycle platform, the 1973 Kawasaki 900 Z 1 Super 4 relies on a 903 cc (55.1 cu in) air-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 79 HP (57.7 kW) at 8,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 87.5 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 900 Z 1 Super 4 measures 247 kg (545 lbs) wet (curb), translating to a power-to-weight ratio of 0.32 HP/kg (3.13 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 211 km/h (131 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 3 indexed model years from 1972 to 1974, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.