GPZ 305 Belt Drive (reduced effect #2)

1988 Kawasaki GPZ 305 Belt Drive (reduced effect #2) Technical Analysis & Specification Breakdown

Engineered by Kawasaki for the sport motorcycle segment, the 1988 Kawasaki GPZ 305 Belt Drive (reduced effect #2) relies on a 306 cc (18.7 cu in) air-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 17 HP (12.4 kW) at 7,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 55.6 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the GPZ 305 Belt Drive (reduced effect #2) measures 164 kg (362 lbs) wet (curb), translating to a power-to-weight ratio of 0.1 HP/kg (9.65 kg per horsepower). The 16.5-liter (4.4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 125 km/h (78 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 3 indexed model years from 1988 to 1990, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.