This manual covers the 2002 KTM 400 LC4 and 660 LC4 models, renowned for their powerful single-cylinder LC4 engines, robust chassis, and versatile dual-sport and supermoto capabilities. Drawing from KTM's extensive off-road racing heritage, these motorcycles offer a potent combination of torque, durability, and performance, making them a popular choice for riders seeking adventure and capability on varied terrains. The 400 LC4 features a 398cc engine, while the 660 LC4 boasts a larger 625cc displacement, both known for their strong performance characteristics.

This comprehensive workshop repair service manual provides detailed procedures for all aspects of maintenance, repair, and troubleshooting for your 2002 KTM 400 LC4 and 660 LC4. It covers engine disassembly and assembly, transmission, chassis, suspension, brakes, and the electrical system, offering step-by-step guidance for everything from routine servicing and fluid changes to complete engine rebuilds and electrical diagnostics. This manual is an essential resource for owners, mechanics, and technicians to ensure the optimal performance, reliability, and longevity of these capable KTM motorcycles.