The KTM 400 LC4 and 660 LC4 models from the year 2000 represent a significant entry in the high-performance dual-sport and adventure motorcycle segment. Renowned for their robust, liquid-cooled, four-stroke LC4 single-cylinder engines, these motorcycles are engineered for both on-road versatility and off-road capability. Their design emphasizes a lightweight and agile chassis, contributing to exceptional rider control and performance in diverse conditions. Building on KTM's strong off-road racing heritage, the LC4 platform is celebrated for its durability and the characteristic torque delivered by its potent engine configurations, making these models highly regarded by enthusiasts.

This comprehensive workshop repair service manual provides in-depth technical information and procedures for the KTM 400 LC4 and 660 LC4 models. Covering all repairs from A to Z, it details engine disassembly and assembly, cooling system maintenance, fuel and ignition system servicing, transmission and clutch procedures, chassis and suspension adjustments, brake system overhauls, and electrical system diagnostics. Additionally, the manual includes preventative maintenance schedules, troubleshooting guides for common issues, and essential technical specifications such as torque values and fluid requirements. This resource is essential for owners, mechanics, and technicians seeking to maintain, repair, and optimize the performance and longevity of these capable motorcycles.