The Yamaha Tri-Moto 200 and Tri-Moto 225 models, produced from 1983 to 1986, represent Yamaha's pioneering entry into the three-wheeled ATV market. These versatile off-road vehicles are known for their ruggedness and utility, playing a significant role in popularizing the ATV segment. Engineered for reliable performance, the Tri-Moto line offers a stable platform for various terrains. The 200 models feature a 196 cc air-cooled engine, while the 225 models are powered by a 223 cc variant, both typically paired with a 5-speed manual transmission and an automatic clutch. Their design emphasizes straightforward operation and dependable function for recreational and utility purposes. This comprehensive Workshop Service Repair Manual provides in-depth coverage for all Yamaha Tri-Moto 200 and 225 models across the 1983-1986 production years. It serves as an essential resource for owners, DIY enthusiasts, and independent repair shops, detailing every service and repair procedure. The manual includes extensive information on engine mechanicals and electrical systems, transmission, drive train, suspension, brakes, wheels, tires, and frame/bodywork. Routine maintenance, major repairs, component overhauls, and troubleshooting are explained with step-by-step instructions and visual aids, ensuring users can effectively maintain and repair their vehicles.