The KTM 660 LC4 is a performance-oriented single-cylinder motorcycle produced from 1998 to 2003, representing KTM's commitment to a 'Ready to Race' ethos. Known for its potent LC4 engine, this model offered a blend of off-road capability and street performance, appealing to riders seeking a rugged and engaging machine. Its design emphasized raw power and rider feedback, positioning it as a strong competitor in the premium single-cylinder dual-sport and supermoto segments of its era.

This workshop service manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of the KTM 660 LC4. It covers all essential systems, including the engine, transmission, chassis, brakes, and electrical components, with detailed procedures and technical specifications. The manual is designed to assist owners, mechanics, and technicians in ensuring the optimal performance, reliability, and longevity of their vehicle through clear, step-by-step instructions and diagnostic information.