The RD500LC, produced from 1984 to 1986, is a distinguished sportbike renowned for its high-performance two-stroke V4 engine. This model represents a peak in engineering prowess during the mid-1980s, offering a powerful 499cc liquid-cooled engine with reed valve induction and the innovative Power Valve System (YPVS). Its legacy is built on delivering exceptional speed, handling, and a distinctive engine note, appealing to performance-oriented enthusiasts. The RD500LC's design features include dual hydraulic disc brakes front and rear, telescopic forks with anti-dive capabilities, and a sophisticated monoshock rear suspension system, all contributing to its legendary status in the sportbike community. This workshop service manual provides comprehensive guidance for the RD500LC, covering essential maintenance, diagnostics, and repair procedures. The manual details engine disassembly and assembly, lubrication, fuel, ignition, and exhaust systems, as well as transmission and electrical system repairs. It includes specific instructions for proprietary components, special tool identification, and troubleshooting common issues such as carburetor blockages or YPVS system malfunctions. With its detailed information on routine maintenance, tune-ups, and overhaul of major components, this manual serves as an indispensable resource for mechanical technicians and knowledgeable owners seeking to maintain and restore their RD500LC to optimal condition, ensuring its continued performance and reliability.