This manual covers the KTM 400 SX, 400 MXC, 400 EXC, 520 SX, 520 MXC, and 520 EXC models from the 2001 model year. These high-performance off-road motorcycles are built around the robust LC4 engine platform, known for its strong torque and reliability in demanding conditions. The SX variants are designed for motocross, the MXC for cross-country racing, and the EXC for enduro and trail riding, each offering specific gearing and suspension setups tailored to their respective disciplines. KTM's heritage in off-road competition is evident in the performance-focused engineering of these machines, which prioritize power and handling for aggressive riding.

This owner's manual provides essential information for the operation, basic maintenance, and inspection of your KTM motorcycle. It details procedures for engine and transmission care, chassis adjustments, and electrical system checks, along with basic troubleshooting tips for common issues. The scope is focused on owner-level understanding and routine upkeep, not in-depth mechanical repairs or complex diagnostics. By following the guidelines within this manual, owners and technicians can effectively maintain their vehicles, ensuring optimal performance and longevity.

This manual covers the KTM 400 SX, 400 MXC, 400 EXC, 520 SX, 520 MXC, and 520 EXC models from the 2001 model year. These high-performance off-road motorcycles are built around the robust LC4 engine platform, known for its strong torque and reliability in demanding conditions. The SX variants are designed for motocross, the MXC for cross-country racing, and the EXC for enduro and trail riding, each offering specific gearing and suspension setups tailored to their respective disciplines. KTM's heritage in off-road competition is evident in the performance-focused engineering of these machines, which prioritize power and handling for aggressive riding.

This owner's manual provides essential information for the operation, basic maintenance, and inspection of your KTM motorcycle. It details procedures for engine and transmission care, chassis adjustments, and electrical system checks, along with basic troubleshooting tips for common issues. The scope is focused on owner-level understanding and routine upkeep, not in-depth mechanical repairs or complex diagnostics. By following the guidelines within this manual, owners and technicians can effectively maintain their vehicles, ensuring optimal performance and longevity.