Kawasaki GPZ750 ZX750 1982-1988 Service Manual

Kawasaki introduced the GPZ750 in 1982 as a direct evolution of the KZ750, aimed squarely at the emerging sportbike category rather than the sport-cruiser lane the KZ line was settling into. The changes weren't just cosmetic: tapered steering-head bearings replaced the KZ's ball bearings, a redesigned upper triple clamp brought solid aluminum clip-on grips in place of a traditional handlebar, and a bikini fairing nearly identical to the GPZ550's gave the bike a genuinely purposeful look.

Power comes from a 738cc air-cooled inline-four, DOHC with 2 valves per cylinder, running through 36mm Mikuni carburetors with a reworked combustion chamber that Kawasaki factory-ported and polished. Higher compression and quicker-lifting camshafts pushed output to a claimed 80 hp at 9,500 rpm and roughly 48.5 lb-ft of torque at 7,500 rpm, backed by an added oil cooler to handle the extra heat. 1983 brought Uni-Trak rear suspension in place of the original dual-shock setup, a genuine handling upgrade that carried the GPZ750 name into its final air-cooled year.

The GPZ750 sat alongside the more exotic GPZ750 Turbo during this period — Kawasaki's turbocharged answer to the early-'80s turbo arms race, built in far smaller numbers and considerably more expensive — before the naked-air-cooled GPZ750 was retired in favor of the liquid-cooled GPZ750R for the mid-to-late-'80s. Dry weight on the original sits around 506 lbs, with a 22-litre fuel tank and a 780mm seat height typical of the era's sport-touring stance.