Honda TRX90X Sportrax 90X 2019 Manual
![Honda TRX90X Sportrax 90X 2019 ATV manual cover](/images/wWQmpsQsZvAYWeAGqrQwHLbS/thumbs/thumb175x175.webp)
The recommended oil type for the Honda TRX90X 2019 is SAE 10W-30, and the engine oil capacity is approximately 1 quart (0.95 liters) when changing the oil filter.
To adjust the chain tension, place the ATV on a level surface, loosen the rear axle nut, and turn the chain adjuster bolts equally on both sides until the chain has about 3/4 inch of slack. Tighten the axle nut securely after adjustment.
Remove the seat and air filter cover, take out the air filter element, wash it in a non-flammable solvent, allow it to dry, then apply air filter oil. Reinstall the filter, cover, and seat.
The spark plug should be inspected every 12 months or 1,200 miles and replaced if necessary. Use the recommended NGK CR6HSA or equivalent spark plug.
The recommended tire pressure for the Honda TRX90X 2019 is 2.5 psi for both front and rear tires. Always check and adjust the pressure when the tires are cold.
If the ATV won't start, check the battery charge, ensure the fuel valve is open, inspect the spark plug, and verify that the engine stop switch is set to the "Run" position.
To replace the brake pads, remove the wheel, unbolt the caliper, take out the old pads, compress the caliper piston, install new pads, and reassemble the caliper and wheel.
Remove the carburetor from the engine, disassemble it, and clean all jets and passages with carburetor cleaner. Reassemble and reinstall it on the engine, ensuring all connections are secure.
The recommended maintenance schedule includes oil changes every 600 miles, air filter cleaning every 600 miles, and valve clearance checks every 1,200 miles. Adjust other components per the owner's manual guidelines.
To enhance performance, consider upgrading the exhaust system, installing a high-performance air filter, and ensuring the carburetor is properly tuned. Regular maintenance also plays a key role in performance.