The Suzuki GSXR600, specifically the K4/K5 generation produced between 2004 and 2005, represents a significant evolution in the middleweight supersport motorcycle class. Known for its potent 599 cc four-stroke, liquid-cooled engine, this model delivers approximately 110-115 horsepower, channeled through a precise 6-speed transmission. Its engineering prowess is evident in the advanced aluminum twin-spar frame, inverted telescopic front forks, and linkage-type rear suspension, all contributing to exceptional handling and rider feedback. Designed for performance-oriented riding, the GSXR600 (Gixxer) offers a dynamic and engaging experience, building upon Suzuki's rich heritage in motorcycle racing. This comprehensive workshop service manual is your essential guide for the repair and overhaul of the Suzuki GSXR600 (K4/K5). Covering a wide array of systems, including detailed procedures for engine disassembly and reassembly, fuel and ignition systems, lubrication, electrical components, transmission, suspension, brakes, and more, this manual ensures you have the information needed for meticulous maintenance. It provides step-by-step instructions for routine servicing, component removal and installation, troubleshooting common issues, and references special tools. With its in-depth coverage, this 465-page English-language manual is an indispensable resource for both professional technicians and dedicated enthusiasts seeking to maintain and optimize their GSXR600.