GPZ 900 R (reduced effect)

1988 Kawasaki GPZ 900 R (reduced effect) Technical Analysis & Specification Breakdown

Engineered by Kawasaki for the sport touring motorcycle segment, the 1988 Kawasaki GPZ 900 R (reduced effect) relies on a 908 cc (55.4 cu in) liquid-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 100 HP (73 kW) at 9,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 110.1 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the GPZ 900 R (reduced effect) measures 257 kg (567 lbs) wet (curb), translating to a power-to-weight ratio of 0.39 HP/kg (2.57 kg per horsepower). The 22-liter (5.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 240 km/h (149 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 9 indexed model years from 1984 to 1992, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.