Honda TRX420FM1 4X4 FourTrax Rancher 2017 Manual
![Honda TRX420FM1 4X4 FourTrax Rancher 2017 ATV manual cover](/images/DzRNOYQNxwxweqEhvKstNZeG/thumbs/thumb175x175.webp)
Use a high-quality 10W-30 or 10W-40 motor oil that is specifically designed for wet clutch systems. Ensure the oil meets the JASO T 903 MA standard.
The oil and oil filter should be changed every 100 hours or at least once a year, whichever comes first. For heavy use, consider changing more frequently.
The recommended tire pressure is 5 psi for the front tires and 5 psi for the rear tires. Always check the tire pressure when the tires are cold.
First, check the battery connections for tightness and corrosion. Ensure the battery is fully charged. If the issue persists, check the starter relay and starter motor.
Ensure the radiator is not clogged and the coolant level is adequate. Check for leaks and ensure the cooling fan is operational. Consider flushing the cooling system if necessary.
Remove the air filter and inspect it for dirt and damage. Clean it using a mild detergent and water if it's a foam filter. Replace it if it’s excessively dirty or damaged.
The spark plug gap should be set to 0.8-0.9 mm (0.031-0.035 inches). Use a feeler gauge to check the gap and adjust if necessary.
Locate the idle adjustment screw on the carburetor. Turn it clockwise to increase the idle speed and counterclockwise to decrease it, ensuring the engine runs smoothly at idle.
Inspect the drive chain and sprockets for wear and lubrication. Check for loose bolts and nuts. Examine the suspension and wheel bearings for wear or damage.
Regularly check and clean the battery terminals. Keep the battery charged, especially during long periods of inactivity. Use a battery tender if necessary.