The KTM 400 LC4, available in Enduro and Supermoto variants, represents a significant offering in the dual-sport and off-road motorcycle market. Produced between 1998 and 2003, these models are renowned for their robust, torquey single-cylinder LC4 engine, delivering strong performance suitable for both challenging terrain and street use. Building on KTM's extensive off-road heritage, the 400 LC4 platform offers a compelling blend of power and agility, distinguishing itself with its versatile capabilities and Austrian engineering quality.

This comprehensive Workshop Service Manual (WSM) provides detailed guidance for the maintenance, repair, and servicing of KTM 400 LC4 models from 1998 to 2003. It covers all essential systems, including the engine, transmission, chassis, suspension, brakes, fuel, and electrical systems. The manual offers step-by-step procedures for routine maintenance, engine overhauls, and troubleshooting, supported by technical specifications, wiring diagrams, and diagnostic information. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their vehicle.