Yamaha YXR45FY Rhino Independent Suspension 450 2009 Owner's Manual

For optimal performance, use SAE 10W-40 4-stroke motor oil that meets or exceeds the JASO MA standard.
The air filter should be inspected every 20 hours of operation and cleaned or replaced as necessary, especially in dusty conditions.
The recommended tire pressure is 8 psi for the front tires and 9 psi for the rear tires.
Check the battery connections, ensure the fuel valve is open, and inspect the spark plug for wear or damage.
Signs include unusual noises during operation, uneven tire wear, and a rougher ride than usual.
Adjust the preload on the shock absorbers by turning the adjustment ring clockwise to increase stiffness or counterclockwise to soften the ride.
Regularly check the brake fluid level, inspect brake pads for wear, and ensure the brake lines are free of leaks or damage.
Check for low coolant levels, inspect the radiator for obstructions, and ensure the fan is functioning correctly.
Maintain proper tire pressure, perform regular engine tune-ups, and avoid carrying unnecessary weight.
Stop the engine immediately and check for loose parts, low oil levels, or any signs of mechanical damage.