This manual provides comprehensive service and repair information for a range of motorcycles, including the GPZ 400, GPZ 550, Z 400 F, Z 400 FII, Z 500, and Z 550 F models produced between 1983 and 1985. These motorcycles represent a significant period in history, known for their inline-four engines, advanced (for the time) chassis designs like the Uni-Trak rear suspension, and performance-oriented capabilities. The GPz series, in particular, helped define the sportbike category, offering a blend of speed, handling, and distinctive styling that garnered positive reception and contributed to the reputation for engineering excellence.

This Service Manual / Workshop Manual is designed to assist owners, independent mechanics, and restoration enthusiasts in maintaining and repairing these classic machines. It covers all essential aspects of the motorcycles, including detailed procedures for engine assembly and disassembly, transmission and clutch operation, chassis components such as the frame, forks, and suspension, as well as comprehensive guidance on the braking and electrical systems. Furthermore, the manual offers in-depth troubleshooting charts, diagnostic procedures for common issues like carburetor and electrical problems, and specific maintenance schedules for routine tasks and fluid specifications, ensuring the longevity and optimal performance of your motorcycle.