GPX 500 R

1989 Kawasaki GPX 500 R Technical Analysis & Specification Breakdown

Positioned in Kawasaki's sport touring motorcycle lineup, the 1989 Kawasaki GPX 500 R features a 497 cc (30.3 cu in) liquid-cooled in-line four, four-stroke configuration. In factory specification, peak output is rated at 75.1 HP (54.8 kW), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 151.1 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.

On the scales, the GPX 500 R measures 210 kg (463 lbs) wet (curb), translating to a power-to-weight ratio of 0.36 HP/kg (2.8 kg per horsepower).