This manual covers the LC4 400/660 models produced between 1998 and 2005. The LC4 platform is renowned for its powerful, liquid-cooled four-stroke single-cylinder engine, robust chassis, and advanced suspension, offering exceptional off-road capability and strong performance for dual-sport applications. Building on extensive racing heritage, these motorcycles were engineered for riders demanding reliability and performance in challenging conditions, competing effectively against other high-performance single-cylinder machines of their era.

This comprehensive repair manual provides detailed guidance for all aspects of maintenance and repair. It includes step-by-step procedures for engine disassembly and assembly, fuel and ignition systems, transmission, clutch, suspension, brakes, and the electrical system. The manual also covers routine maintenance, troubleshooting common issues, and provides essential technical specifications, torque values, and wiring diagrams. Its thorough coverage is designed to assist both owners and professional technicians in maintaining and restoring the LC4 to optimal working condition.