This manual covers the Yamaha APEX LTX GT Series Snowmobile, including models RX10, RX10S, RX10R, RX10RS, RX10M, RX10MS, RX10K, RX10RK, RX10RSK, RXW10K, RXW10SK, RX10MK, RX10MSKSJ, RX10RTL, RX10RL, RX10RTRL, RX10RSL, RX10GTL, RXW10L, RX10ML, RX10RTW, RX10RTRW, RXW10GTW, RX10MSW, RXW10J, and RXW10SJ, produced between 2002 and 2012. Yamaha has a long-standing reputation for producing high-quality, innovative, and reliable snowmobiles, with the Apex series representing a significant advancement in performance and refinement due to its advanced 998cc 4-cylinder, liquid-cooled engine. This model is known for its comfort, power, and engineering, making it a popular choice for trail and touring enthusiasts. This comprehensive workshop service repair manual provides factory-level detail for owners and independent repair shops. It covers all essential systems, including general information, safety precautions, periodic maintenance, special tools, and detailed technical specifications. In-depth sections address the engine, fuel, cooling, electrical, drivetrain, chassis, suspension, steering, and braking systems, offering step-by-step instructions for repair and rebuild procedures. The manual also includes an extensive troubleshooting guide, circuit diagrams, and wiring diagrams, empowering users to effectively maintain, diagnose, and repair their Yamaha APEX LTX GT Series Snowmobile.