The Stinger 250, also designated STG 250, is an All-Terrain Vehicle (ATV) from Siam Motors Company, designed for recreational use. While specific production years are not detailed, this model represents SMC's contribution to the entry-level to mid-range ATV market. Known for its likely robust engineering and reliability, the Stinger 250 is built to handle various terrains, offering a capable platform for off-road adventures. This Service Repair Workshop Manual provides comprehensive, factory-type information for the Stinger 250. It is meticulously organized to guide both DIY enthusiasts and professional mechanics through every aspect of maintenance and repair. The manual covers all major systems, including detailed engine overhaul, fuel and ignition systems, cooling, exhaust, transmission, drivetrain, suspension, steering, braking, and electrical systems. Additionally, it includes routine maintenance procedures, troubleshooting diagnostics, component removal and installation instructions, rebuild procedures, and detailed wiring diagrams, ensuring users can effectively maintain and repair their vehicle.