GPZ 400

1983 Kawasaki GPZ 400 Technical Analysis & Specification Breakdown

Engineered by Kawasaki for the sport touring motorcycle segment, the 1983 Kawasaki GPZ 400 relies on a 399 cc (24.4 cu in) air-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 27 HP (19.7 kW) at 9,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 67.7 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 GPZ 400 measures 202 kg (445 lbs) wet (curb), translating to a power-to-weight ratio of 0.13 HP/kg (7.48 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 142 km/h (88 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 4 indexed model years from 1983 to 1989, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.