This manual covers the models from 1979. These motorcycles are designed for riders seeking reliable performance and a classic riding experience. The engineering quality and inherent reliability of these models make them enduring choices for both daily commuting and recreational riding. This service manual provides comprehensive information to ensure these vehicles continue to operate at their peak potential. This comprehensive guide is prepared for both professional technicians and do-it-yourself mechanics. It details essential maintenance procedures, troubleshooting steps, technical specifications, and safety guidelines necessary for the upkeep and repair of your KZ500, KZ550, or ZX550. By following the step-by-step instructions and utilizing the critical data contained within, owners and technicians can confidently perform necessary services, ensuring the longevity and optimal functioning of their vehicle.