Z 1000 J

1981 Kawasaki Z 1000 J Technical Analysis & Specification Breakdown

At the heart of the 1981 Kawasaki Z 1000 J naked motorcycle, Kawasaki pairs a 998 cc (60.9 cu in) air-cooled in-line four, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 98 HP (71.5 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 98.2 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 Z 1000 J measures 253 kg (558 lbs) wet (curb), translating to a power-to-weight ratio of 0.39 HP/kg (2.58 kg per horsepower). The 21-liter (5.5 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 1981 to 1983, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.