Yamaha YFM09RYXG Raptor 90 2016 Owner's Manual
![Yamaha YFM09RYXG Raptor 90 2016 manual cover](/images/aaaa9dc1e41243bad8cd20f9/thumbs/thumb175x175.webp)
To perform routine maintenance on your Raptor 90, regularly check and clean the air filter, change the oil every 20 hours of use or every 6 months, and inspect the brakes, tires, and chain tension. Always refer to the owner's manual for detailed procedures and torque specifications.
The recommended oil for the Yamaha Raptor 90 is Yamalube 10W-40 Performance All Purpose or a similar 4-stroke oil with a JASO MA rating. Ensure the oil you choose meets these specifications for optimal performance and engine protection.
If your Raptor 90 won't start, check the battery for charge and connections, inspect the spark plug for wear or fouling, and ensure there is fresh fuel in the tank. Also, verify the operation of the kill switch and the condition of the fuel line and filters.
If the engine overheats, stop the ATV immediately to allow it to cool. Check the coolant level if applicable, ensure the radiator is not obstructed, and confirm that the fan is functioning properly. Regular maintenance of the cooling system can prevent overheating issues.
To adjust the chain tension, first loosen the rear axle nut, then adjust the chain adjuster bolts evenly on both sides until the chain has 10-20 mm of slack in the middle of its span. Re-tighten the axle nut and check the alignment of the rear wheel.
Common signs of worn brakes include squealing or grinding noises when braking, reduced braking efficiency, or a spongy brake lever feel. Regularly inspect brake pads for wear and replace them when the friction material is less than 1 mm thick.
To improve performance, consider upgrading the air filter and exhaust system for better airflow. Additionally, ensure regular maintenance is performed, including proper tire pressure and alignment, to maintain optimal performance. Consult with a professional if considering any significant modifications.
The recommended tire pressure for the Yamaha Raptor 90 is 4 psi for the front tires and 5 psi for the rear tires. Always check tire pressure when the tires are cold and adjust as necessary to ensure proper handling and longevity.
To replace the spark plug, first remove the spark plug cap, then use a spark plug socket to unscrew the old plug. Install the new plug by hand to avoid cross-threading, then tighten with a socket. Reattach the spark plug cap securely. Use an NGK CR7HSA or equivalent plug.
If experiencing electrical issues, check the battery for proper voltage and connections. Inspect fuses for any that may be blown and replace them if necessary. Examine wiring for signs of damage or corrosion, and consult the wiring diagram for troubleshooting specific circuits.