GPX 600 R

1999 Kawasaki GPX 600 R Technical Analysis & Specification Breakdown

Built around Kawasaki's sport motorcycle platform, the 1999 Kawasaki GPX 600 R relies on a 593 cc (36.2 cu in) liquid-cooled in-line four, four-stroke powerplant. In factory specification, peak output is rated at 73 HP (53.3 kW) at 10,500 rpm while maximum torque reaches 53 Nm (39.1 lb-ft) at 8,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 123.1 HP per liter and a 2,500 rpm working window between peak torque (8,000 rpm) and peak power (10,500 rpm), 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 GPX 600 R measures 210 kg (463 lbs) wet (curb), translating to a power-to-weight ratio of 0.35 HP/kg (2.88 kg per horsepower). Rider ergonomics and chassis geometry center around a 760 mm (29.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,425 mm (56.1 in) wheelbase engineered for balanced agility and highway composure. The 18-liter (4.8 US gal) fuel tank paired with a rated consumption of 6.2 L/100 km provides an estimated theoretical range of roughly 290 km (180 miles) between fill-ups, while factory top speed is listed at 210 km/h (130 mph).

Within MotoLibrary's Kawasaki archive, this model family spans 5 indexed model years from 1988 to 1999, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.