Honda TRX420FE1 4X4 FourTrax Rancher 2015 Manual
![Honda TRX420FE1 4X4 FourTrax Rancher 2015 ATV manual cover](/images/ttArrFywhEiTqUaNVZwSbfrL/thumbs/thumb175x175.webp)
The recommended engine oil for the Honda TRX420FE1 is 10W-30, 4-stroke motorcycle oil that meets or exceeds the requirements for API service classifications SG, SF/CC, or CD.
It is recommended to change the oil every 600 miles or every 100 hours of operation, whichever comes first. Additionally, it's good practice to change the oil after the first 100 miles or 20 hours for a new ATV.
The recommended tire pressure is 4.4 psi for both the front and rear tires. Always check the tire pressure when the tires are cold for the most accurate reading.
If the ATV won't start, check the battery connections, ensure the fuel valve is open, verify the kill switch is in the 'run' position, and inspect the spark plug for damage or wear.
To check and adjust the valve clearance, remove the seat and fuel tank, then remove the valve cover. Use a feeler gauge to measure the clearance and adjust as necessary. The specified valve clearance is 0.15 mm for both intake and exhaust valves.
Remove the air filter cover and take out the filter. Wash it in warm, soapy water, rinse, and let it dry completely. Apply air filter oil before reinstalling. Inspect for damage and replace if necessary.
Check the transmission oil level and condition. If low or dirty, replace the oil. Inspect the shift linkage for damage or misalignment, and ensure the clutch is properly adjusted.
Regularly check the battery terminals for corrosion and clean them as needed. Ensure the battery is fully charged, especially during storage, and use a battery maintainer if the ATV won't be used for extended periods.
The maintenance schedule includes: oil change every 600 miles or 100 hours, air filter cleaning every 100 hours, valve clearance check every 600 miles, spark plug replacement every year, and regular checks of brakes, tires, and fluid levels.
Ensure the radiator is clean and free of debris, check coolant levels regularly, and avoid prolonged idling in hot weather. If overheating persists, inspect the thermostat and radiator fan for proper operation.