The 2004 Bruin 350 4WD and Grizzly 350 4WD are robust All-Terrain Vehicles (ATVs) designed for a variety of demanding tasks and recreational pursuits. These models, representing a commitment to engineering excellence and reliability, feature a 348cc liquid-cooled engine, selectable 4WD with a locking front differential, and a renowned Continuously Variable Transmission (CVT) system for smooth power delivery and effective engine braking. With independent front suspension, ample ground clearance, and substantial towing and rack capacities, these ATVs are built to handle challenging terrain, making them ideal for hunting, utility work, and trail riding. This comprehensive service, repair, and maintenance manual provides detailed, dealership-level technical information for the 2004 Bruin 350 4WD and Grizzly 350 4WD ATVs. It covers all essential systems, including engine and drivetrain, chassis and suspension, and electrical components. Owners and technicians will find step-by-step instructions for routine maintenance, troubleshooting common issues, and performing complete overhauls. The manual includes critical specifications, torque values, and clear diagnostic procedures, empowering users to maintain their vehicles efficiently and ensure optimal performance and longevity.