This manual covers the KTM 660 LC4 motorcycle models produced between 1998 and 2003. Renowned for its robust LC4 single-cylinder engine and strong off-road heritage, the KTM 660 LC4 is a performance-oriented dual-sport and enduro machine. It offers capable off-road performance, blending KTM's established off-road expertise with versatility for various riding conditions. This vehicle is engineered for enthusiasts seeking a durable and powerful motorcycle for demanding terrain.

This Workshop Service Manual (WSM) provides comprehensive service and repair information for your KTM 660 LC4. It details complete engine disassembly, assembly, and repair, along with procedures for the fuel, ignition, cooling, transmission, suspension, brake, and electrical systems. The manual also covers routine maintenance, troubleshooting common issues, and specific overhaul procedures for key components. With detailed diagrams, torque specifications, and diagnostic flowcharts, this manual is an essential resource for owners and technicians to ensure the optimal performance and longevity of the vehicle.