Welcome to the owner's manual for the 2005 YFM250BT Bruin, a robust all-terrain vehicle designed for reliable performance. This first-generation model features a 249 cc, air-cooled, 4-stroke engine with a SOHC, 2-valve configuration and a carburetor fuel system. Its engineering emphasizes durability and user-friendliness, offering a thumb lever throttle and an automatic transmission with forward, neutral, and reverse gears. The Bruin is equipped with both recoil and electric starting, a 2WD/4WD selector, and front and rear disc brakes, making it a versatile choice for various terrains and tasks. This comprehensive English owner's manual provides essential information for operating, maintaining, and caring for your YFM250BT Bruin. It covers critical areas such as recommended engine oil types and capacities, periodic maintenance schedules for engine oil, air filters, and spark plugs, as well as tire specifications and pressures. Additionally, the manual includes vital safety information, riding techniques, and a troubleshooting guide to assist with common issues. By utilizing the detailed procedures and technical data within this manual, owners and technicians can ensure the longevity and optimal performance of their vehicle.