This manual covers the KTM 400 LC4 and KTM 660 LC4 models produced between 1998 and 2003. These dual-sport motorcycles are known for their ruggedness and powerful single-cylinder LC4 engines, designed for both off-road capability and adventure touring. The LC4 platform has a legacy of performance and endurance, making these models a popular choice for riders seeking a robust and engaging riding experience. Proper maintenance is key to ensuring their reliability and longevity, reflecting KTM's heritage in performance-oriented vehicles.

This comprehensive service and repair manual provides detailed instructions and technical specifications essential for the maintenance and repair of your KTM LC4 motorcycle. It covers all major systems, including engine mechanicals and electrical components, fuel and transmission systems, suspension, brakes, and chassis. The manual includes step-by-step repair procedures, preventative maintenance schedules, troubleshooting guides, and torque specifications. Its purpose is to empower owners, mechanics, and technicians with the knowledge needed to keep these capable machines in optimal condition, ensuring performance and safety.