Yamaha YFM09GYXL Grizzly 90 2020 Owner's Manual

To start the Yamaha Grizzly 90, ensure the ATV is in neutral, turn the ignition key to the 'ON' position, ensure the engine stop switch is in the 'RUN' position, and then press the start button.
Use unleaded gasoline with a minimum octane rating of 87 for the Yamaha Grizzly 90 to ensure optimal performance and engine health.
It is recommended to change the oil every 6 months or every 100 hours of operation, whichever comes first. Always use the recommended oil type as per the owner's manual.
Check the fuel level, ensure the ATV is in neutral, verify that the battery is charged, and inspect the spark plug for wear or damage. If the problem persists, consult a professional mechanic.
To adjust the chain tension, locate the chain adjusters on the rear axle, loosen the axle nut, adjust the tensioners evenly on both sides, and then retighten the axle nut. Ensure the chain has proper slack as specified in the manual.
The recommended tire pressure for the Yamaha Grizzly 90 is typically around 4.0 psi for both front and rear tires. Always check the tire pressure when the tires are cold.
Remove the air filter cover, take out the air filter, and wash it with a mild detergent. Rinse thoroughly, let it dry completely, and apply a light coat of air filter oil before reinstalling.
Inspect the brake pads for wear and replace them if necessary. Clean the brake rotors and calipers to remove any debris. If the issue persists, consult a mechanic for further inspection.
To improve battery life, ensure the battery is regularly charged, avoid leaving electrical components on when the ATV is not in use, and store the ATV in a cool, dry place. Consider using a battery tender for prolonged storage periods.
Regular maintenance includes checking and changing the oil, inspecting the brakes, adjusting the chain tension, cleaning the air filter, and checking tire pressure. Refer to the owner's manual for detailed maintenance schedules.