The BRUIN 250, model designation YFM250, is a robust all-terrain vehicle from the First Generation series, produced between 1998 and 2005. Known for its engineering quality and reliability, the BRUIN 250 offers a balanced blend of performance and capability, making it suitable for a variety of utility and recreational tasks. Its four-stroke, SOHC, air-cooled engine, with a displacement of approximately 230cc, is paired with an automatic Continuously Variable Transmission (CVT) and shaft drive, providing a user-friendly and efficient experience. This model is a testament to a respected heritage in the ATV market, designed to meet industry safety standards. This comprehensive service and repair manual provides factory-level information for all BRUIN 250 YFM250 configurations from 1998 to 2005. It covers an extensive range of systems, including detailed procedures for engine overhaul, drivetrain maintenance, braking system servicing, suspension component repair, and electrical system diagnostics, complete with wiring diagrams. The manual also includes step-by-step instructions for disassembly and reassembly, troubleshooting guides, maintenance schedules, and specifications for specialized tools. Designed for DIY owners, independent repair shops, and professional mechanics, this manual empowers users to perform maintenance and repairs effectively, ensuring the longevity and optimal performance of their vehicle.