This manual provides comprehensive service, repair, and maintenance information for the 1999 TE 610 LT SM S. As a versatile dual-sport and supermoto motorcycle, the TE 610 series is known for its robust single-cylinder, four-stroke engine, typically around 600cc and liquid-cooled, delivering an estimated 40-50 horsepower. Its heritage, dating back to origins, is reflected in its off-road prowess and adaptable performance, with variants like the LT and SM suggesting specific configurations for long-travel or supermoto use. The 1999 model year places it within a production era characterized by performance-oriented engineering. This repair service manual in English is designed to assist professional technicians and experienced DIY mechanics. It covers essential areas including detailed engine procedures, fuel system adjustments, ignition system diagnostics, cooling system maintenance, transmission and drivetrain servicing, suspension and brake system overhauls, and electrical system troubleshooting. The manual also details routine maintenance tasks such as oil changes, filter replacements, and chain care, along with systematic troubleshooting guides for common issues like carburetor tuning and electrical connections. Its step-by-step instructions and technical specifications aim to equip users with the knowledge to effectively maintain and repair the vehicle.