The Big Bear 400, model codes YFM400FWNP, YFM400FWNM, and YFM400NM, represents a robust utility All-Terrain Vehicle (ATV) designed for recreational riders, farm use, and trail riding. Produced between 2000 and 2006, this model is known for its reliable 4-stroke, liquid-cooled engine and selectable 4WD capability, offering versatility across various terrains. Key features include an automatic transmission with high/low range and reverse, independent front suspension for enhanced comfort, and a dependable hydraulic disc brake system. The long-standing reputation for quality and durability underpins the Big Bear 400's design, making it a trusted choice in the competitive utility ATV market. This comprehensive Shop Manual / Service & Repair Manual provides in-depth coverage for the Big Bear 400 (2000-2006) in English. It is meticulously structured to assist owners and technicians in maintaining and repairing the vehicle. The manual details engine mechanical and electrical systems, fuel system, transmission, suspension, brakes, steering, and chassis components. It includes essential maintenance schedules, troubleshooting guides, step-by-step repair procedures, rebuild instructions, torque specifications, and clear wiring diagrams. This resource is designed to enable thorough diagnostics and component-level repairs, ensuring the longevity and optimal performance of your Big Bear 400.