Yamaha YFM45FXY Wolverine 450 2009 Owner's Manual

To change the oil, warm up the engine, turn it off, and place an oil pan underneath. Remove the drain plug and let the oil drain completely. Replace the drain plug, remove the old oil filter, and install a new one. Refill with the recommended oil type and quantity.
The recommended tire pressure for the Yamaha YFM45FXY Wolverine 450 is typically 4 psi for the front tires and 4 psi for the rear tires. Always check the owner’s manual for confirmation.
If your Wolverine 450 won't start, check the battery for charge and connections. Ensure the fuel is fresh and reaching the engine. Inspect the spark plug for wear or damage and replace if necessary.
The Yamaha YFM45FXY Wolverine 450 typically requires a 10W-40 type oil. It's important to use oil specifically designed for 4-stroke engines. Check the owner's manual for any specific brand recommendations.
Routine maintenance should be performed every 20 hours of operation or once per month, whichever comes first. This includes checking oil levels, brakes, tire pressure, and general inspection for wear and tear.
To adjust the carburetor, locate the air/fuel mixture screw and idle screw. Adjust the air/fuel mixture for smooth idling and use the idle screw to set the desired idle speed. Ensure the engine is warmed up before making adjustments.
If overheating occurs, immediately stop the engine and let it cool down. Check the radiator for any blockages and ensure coolant levels are adequate. Inspect hoses and the radiator cap for any signs of damage or leaks.
To replace brake pads, remove the wheel, detach the caliper, and take out the worn pads. Insert new pads, reattach the caliper, and ensure all bolts are tightened securely. Reinstall the wheel and test the brakes before riding.
To prepare for winter storage, clean the ATV thoroughly, change the oil and filter, add fuel stabilizer to a full tank, and disconnect the battery. Store it in a dry, covered area, ideally off the ground.
To check valve clearance, remove the valve cover and use a feeler gauge to measure the gap between the valve stem and rocker arm. Adjust using the adjusting screw to the specifications in the owner’s manual. Retighten and reassemble all components.