The Kawasaki Ninja 600R (North America), also known as the GPZ 600R in the European market from 1985 to 1990 and GPX 600R from 1988 to 1997, was a sports motorcycle Made by Kawasaki as GPZ from 1985 to 1990 and GPX from 1988 to 1997.
Over the years, the bike received several modifications, such as a new double-cradle steel frame and a different anti-dive system named Electronic Suspension Control System (ESCS) to improve the Automatic Variable Damping System (AVDS). The GPX offered 84 hp and a top speed of 225 kph (140 mph), while the GPZ delivered 76 hp and 217 kph (135 mph) top speed.
In 1987, the Japanese motorcycle maker released the Kawasaki GPX 600R Ninja (ZX 600R C2), a sports motorcycle packed with features, such as six-spoke aluminum wheels, a single exhaust system, a two-piece dual seat with a passenger grab handle, a full fairing, and a small windscreen.
The bike was built around a double-cradle tubular steel frame with a 38 mm anti-dive telescopic fork on the front and a rising rate preload and rebound-adjustable shock absorber on the rear, offering optimum suspension performance.
In the performance department, the 1987 Kawasaki GPX 600R Ninja (ZX 600R C2) was equipped with a 598cc four-stroke four-cylinder liquid-cooled engine that delivered an output power of 85 hp at 11,000 rpm and 57 Nm (42 lb-ft) torque at 9,000 rpm.