The KTM 400 LC4 and its 660 LC4 variant represent a lineage of powerful, versatile dual-sport motorcycles, produced from 2003 onwards. Known for their robust, torquey single-cylinder LC4 engines, these models are engineered for both off-road prowess and street usability. The platform's design philosophy emphasizes durability and performance, making it a capable choice for adventure riding and demanding terrain. KTM's heritage in off-road racing is evident in the LC4's construction, featuring a strong chromium-molybdenum steel trellis frame and adjustable suspension components designed for optimal rider control and comfort.

This comprehensive Factory Service Repair Workshop Manual provides essential guidance for the maintenance, repair, and diagnostics of your KTM 400 LC4 and 660 LC4 models. It covers all critical systems, including the engine, transmission, chassis, electrical system, braking system, and fuel system, offering detailed procedures for routine maintenance, major repairs, and component overhauls. With in-depth technical specifications, torque values, and troubleshooting guides, this manual is an indispensable resource for owners and technicians seeking to ensure the optimal performance, reliability, and longevity of their vehicle.