The Yamaha RD500LC, produced between 1984 and 1985, was a celebrated high-performance motorcycle renowned for its potent 499cc liquid-cooled, 2-stroke V4 engine, delivering approximately 80-88 horsepower. This iconic machine, drawing inspiration from Yamaha's Grand Prix racing heritage, offered a unique two-stroke V4 experience, competing against other sportbikes of its era. Its engineering focused on performance and rider control, featuring dual front disc brakes, a rear disc brake, and a performance-tuned suspension for enhanced stability and handling. This comprehensive workshop service repair manual provides extensive guidance for the Yamaha RD500LC. It covers all critical systems including the engine, fuel, ignition, cooling, transmission, clutch, chassis, suspension, brakes, and electrical system, complete with detailed wiring diagrams. The manual offers step-by-step repair procedures, detailed substeps, troubleshooting guides, diagnostic procedures, and maintenance schedules, making it an invaluable resource for owners and technicians alike. It facilitates complete disassembly, rebuilds, diagnostics, and component repair, ensuring the optimal performance and longevity of this legendary motorcycle.