GPZ 400 (reduced effect)

1984 Kawasaki GPZ 400 (reduced effect) Technical Analysis & Specification Breakdown

At the heart of the 1984 Kawasaki GPZ 400 (reduced effect) sport touring motorcycle, Kawasaki 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 10,000 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 (reduced effect) 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 151 km/h (94 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 2 indexed model years from 1984 to 1985, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.