This manual covers the KTM 400 XC-W, a performance-oriented off-road motorcycle produced from 2000 to 2007. Renowned for its racing heritage, the 400 XC-W features a robust LC4 engine architecture, typically a liquid-cooled, single-cylinder unit with a SOHC, 4-valve configuration, delivering approximately 40-50 horsepower. Its design prioritizes aggressive riding and enduro competition, characterized by long-travel WP suspension, powerful hydraulic disc brakes, and a sturdy steel trellis frame. The 400 XC-W is built for demanding trail riding and offers a raw, connected riding experience, a hallmark of KTM's commitment to off-road excellence.

This workshop repair service manual provides comprehensive guidance for maintaining and repairing the KTM 400 XC-W. It details procedures for engine disassembly, overhaul, and diagnosis, covering critical components like the top and bottom end, cooling, and lubrication systems. The manual also addresses the fuel, ignition, transmission, suspension, brakes, and electrical systems, offering step-by-step instructions for routine maintenance, troubleshooting, and component repair. Essential technical specifications, including torque values and fluid recommendations, are included to ensure accurate servicing. This resource is invaluable for owners and technicians seeking to preserve the optimal performance and longevity of their 400 XC-W.