The 2003 GSX-R750 (K3) is a high-performance supersport motorcycle renowned for its potent inline-four engine, aggressive aerodynamics, and track-oriented capabilities. Building on a rich heritage in motorcycle racing, this model represents a significant evolution, featuring a refined aluminum twin-spar frame, fully adjustable suspension, and a sophisticated Dual Throttle Valve (SDTV) fuel injection system for enhanced throttle response and power delivery. Its design prioritizes agility and stability, making it a popular choice for both spirited road riding and track day enthusiasts, competing directly with other leading sportbikes of its era. This comprehensive Service and Repair Manual provides detailed guidance for the maintenance and repair of the 2003 GSX-R750. It covers all essential systems, including the engine, transmission, chassis, braking, and electrical components, offering step-by-step procedures for disassembly, assembly, and troubleshooting. Essential maintenance schedules, fluid specifications, and diagnostic charts are included to assist owners and technicians in keeping the GSX-R750 in optimal condition, ensuring its legendary performance and reliability are maintained throughout its service life.