The Moto-4 225 (YFM225), produced from 1986 to 1988, represents a significant model in ATV heritage. This first-generation model is recognized for its dependable air-cooled, 4-stroke engine, offering a balanced blend of power and usability for recreational and utility purposes. With its robust construction and the inherent reliability associated with engineering, the Moto-4 225 provided a capable platform for various terrains and tasks, establishing itself as a popular choice for riders seeking durability and straightforward operation in the evolving ATV market of its era. This comprehensive factory service manual covers the Moto-4 225 (YFM225) models from 1986, 1987, and 1988. It serves as an essential resource for owners, technicians, and mechanics, detailing everything from routine scheduled maintenance and fluid changes to in-depth troubleshooting and complete repair or rebuild procedures for all major systems. The manual includes detailed illustrations, part diagrams, critical torque specifications, and diagnostic steps, ensuring that users have the necessary information to maintain and restore their vehicle to optimal working condition.