This manual covers the Bruin 250 (model code YFM250BT), a 2WD all-terrain vehicle produced between 2005 and 2006. Known for its reliable four-stroke, air-cooled engine and automatic Continuously Variable Transmission (CVT), the Bruin 250 is designed for versatile utility and recreational use. Its robust steel frame, comfortable seating, and user-friendly operation have made it a popular choice for farm work and trail riding, reflecting a strong legacy in building capable ATVs. This comprehensive workshop service and repair manual provides detailed information for owners and independent repair shops. It covers all aspects of the vehicle, including engine tear-down and rebuild, carburetor adjustments, drivetrain maintenance, chassis and suspension systems, and the complete electrical system. The manual includes periodic maintenance schedules, repair procedures, troubleshooting guides, and technical specifications, all presented with clear illustrations and diagrams to facilitate accurate maintenance and repair.