The Yamaha T135 Series, also known by model designations such as Sniper, Jupiter MX, Spark 135, Exciter, and MX King in various Southeast Asian markets, represents a significant entry in the sport underbone segment. Introduced around 2005/2006, this model series was engineered to provide a sportier and more potent alternative to conventional scooters and smaller-displacement motorcycles. Its design emphasizes sporty styling, agility for urban environments, and a performance-oriented engine, typically a 134 cc four-stroke, SOHC, 4-valve, liquid-cooled single-cylinder. Covering production years from 2006 to 2009, the T135 platform is recognized for its class-leading power output and overall reliability when maintained according to factory specifications. This comprehensive English-language manual serves as an indispensable resource for owners and technicians alike, offering detailed guidance on the maintenance, repair, and troubleshooting of the Yamaha T135 Series. It encompasses over 351 pages of service information, supplemented by 61+ pages of parts catalog data, detailing everything from routine servicing, such as oil changes and chain adjustments, to complete engine and transmission overhauls. The manual provides in-depth coverage of all major systems, including the engine mechanicals, fuel system (carburetor or EFI), ignition, transmission, electrical systems, chassis, suspension, brakes, and bodywork. With factory-level detail, precise specifications, and clear diagnostic procedures, this manual is designed to ensure the longevity and optimal performance of the vehicle.