The Yamaha YTM 200 Tri-Moto, including its ERN, EK, and EL variants, represents a significant offering from the first generation of three-wheeled all-terrain vehicles. Produced between 1983 and 1987, these robust machines were engineered for recreational and utility use, leveraging a reputation for reliability and performance in the powersports industry. With a 4-stroke, air-cooled 196cc engine, a 5-speed manual transmission with reverse, and a focus on durability, the YTM 200 was designed to provide dependable operation across varied terrains. Its engineering quality and robust build positioned it as a competitive choice within the popular 1980s trike market. This comprehensive workshop service and repair manual covers all YTM 200 ERN, EK, and EL variants from 1983 to 1987. It provides detailed, step-by-step instructions for routine maintenance, troubleshooting, and complete repair and overhaul of all major systems, including the engine, transmission, chassis, and electrical components. The manual includes essential technical specifications, torque values, wiring diagrams, and practical guidance on common issues. Its purpose is to empower owners, mechanics, and technicians with the knowledge necessary to maintain, diagnose, and repair the YTM 200, ensuring its continued optimal performance and longevity.