This manual covers the Yamaha T135, also known by common names such as the Yamaha Exciter 135, Yamaha Sniper MX 135, and Yamaha Jupiter MX 135. Introduced as a premium entry-level sport underbone motorcycle, the T135 is recognized for its sporty performance, featuring a high-performance 4-stroke, SOHC, 4-valve, liquid-cooled engine with a displacement of approximately 135 cc. Its engineering quality and reliability have made it a popular choice in its segment, competing with models from other manufacturers. The vehicle's design focuses on delivering an engaging riding experience, making it a well-regarded option for riders seeking performance and agility. This comprehensive Factory Service Manual (FSM) is designed to provide detailed guidance for the maintenance, repair, and troubleshooting of the Yamaha T135. It covers all essential systems, including the engine, cooling system, fuel system, chassis, and electrical system, offering step-by-step instructions for component removal, repair, and reassembly. The manual also includes scheduled maintenance procedures, diagnostic guides for common issues, and precise technical specifications such as torque values and clearances. Its purpose is to empower owners, mechanics, and technicians with the knowledge required to ensure the optimal performance, longevity, and safe operation of the motorcycle, with content available in English.