The KTM 400 LC4 Enduro and 660 LC4 Enduro motorcycles, produced between 1998 and 2005, represent a robust lineage of dual-sport and enduro machines. These Austrian-engineered bikes are renowned for their powerful LC4 single-cylinder, liquid-cooled engines, capable off-road performance, and adaptability for adventure touring. Featuring a chromoly steel trellis frame, long-travel WP suspension, and hydraulic disc brakes, the LC4 Enduro models were built for demanding terrain and competitive use, earning accolades in various off-road disciplines. Their design prioritizes mechanical simplicity and rider feedback, making them a favored choice for enthusiasts seeking ruggedness and capability.

This comprehensive Workshop Service Repair Manual provides essential information for the maintenance and repair of your KTM 400/660 LC4 Enduro motorcycle. Covering all aspects from routine owner maintenance to in-depth component overhauls, the manual details procedures for the engine, transmission, clutch, final drive, chassis, suspension, brakes, fuel system, and electrical systems. It includes troubleshooting guides, technical specifications, torque values, and detailed procedural steps, all presented in English with clear diagrams. This resource is designed to assist owners, mechanics, and technicians in keeping these capable machines in optimal condition throughout their service life.