The Yamaha Bruin 250 (YFM250) is an all-terrain vehicle (ATV) produced from 1998 to 2005. Renowned for its reliability and performance in the powersports industry, the Bruin 250 was engineered as a versatile, entry-to-mid-level utility ATV, designed for both recreational use and light utility tasks. It features an air-cooled, 4-stroke, single-cylinder engine with approximately 230cc displacement, typically paired with an automatic Continuously Variable Transmission (CVT) and available in 2WD or 4WD configurations depending on the model variant. Its robust design and commitment to quality make it a dependable choice for navigating various terrains. This professional-quality service and repair manual provides comprehensive guidance for maintaining and repairing Yamaha Bruin 250 ATVs from the 1998 through 2005 model years. The manual covers all engine types and model variants, offering in-depth, step-by-step instructions for routine maintenance, engine service, transmission and drivetrain repair, suspension, braking systems, and electrical systems. It also includes detailed troubleshooting procedures, wiring diagrams, and technical specifications, empowering owners and technicians to perform all aspects of servicing and repair, ensuring the longevity and optimal performance of their vehicle and offering significant cost savings.