Early GP was a Z550 with flash looks and tuned motor. Faster GPz improved handling with a Uni-track back end. Last version had useful half-fairing, air suspension and anti-dive. Very fast, also useful commuter (70mpg). After 50k, top end, camchain and electronic ign hassles. Quick rot exhaust and calipers. Most hard used until the engine wore out around 80k.
1981-89, 553cc DOHC four, 58/65hp 120mph 60/55mpg