The Kawasaki Z250 KZ305, produced from 1979 to 1982, represents a significant entry in the sport motorcycle segment, offering a blend of performance and reliability. This model, powered by an air-cooled, 4-stroke, parallel-twin engine displacing 305cc, features a DOHC valve train and typically produces around 27-30 horsepower. Known for its robust engineering and accessible performance, the Z250 KZ305 was designed for riders seeking an engaging and dependable machine. Its semi-double cradle steel frame and straightforward mechanicals contributed to its reputation for durability and ease of maintenance, making it a popular choice for both commuting and recreational riding during its production era. This comprehensive workshop service repair manual provides in-depth coverage for the Kawasaki Z250 KZ305 across its production years. It details essential maintenance procedures, including oil changes, filter replacements, and chain adjustments, alongside thorough troubleshooting guides for common and complex issues. The manual covers all major systems, from engine overhaul and fuel system service to electrical diagnostics, brakes, suspension, and drivetrain. With hundreds of pages featuring detailed illustrations and step-by-step instructions, this English-language resource is an invaluable tool for Kawasaki Z250 KZ305 owners, independent mechanics, and DIY enthusiasts aiming to maintain, repair, and optimize their motorcycles.