How to Change the Coolant in a 2026 Honda CRF110F Dirt Bike

Shop parts for a 2026 Honda CRF110F Dirt Bike.

Important: The 2026 Honda CRF110F is an air-cooled motorcycle. It does not have a coolant reservoir, radiator, or coolant hoses so there is no coolant to change. The rest of this article explains why that matters and what maintenance you should do instead to keep the engine running cool.

Why there's no coolant to change

The CRF110F uses airflow over the engine fins to dissipate heat. Liquid-cooled engines circulate coolant through a radiator and hoses; air-cooled engines do not. Attempting to follow a liquid-cooling service procedure on an air-cooled bike can cause confusion and unnecessary parts checks.

What to do instead: keep your air-cooled CRF110F running cool

Even though there's no coolant, several routine maintenance tasks directly affect the engine's operating temperature and longevity. Follow these checks and tasks regularly:

  1. Clean the cooling fins

    Why:

    Cooling fins transfer heat to the air. Mud, packed dirt, grass, or oil can block airflow and reduce cooling efficiency.

    How:

    • Use compressed air or a soft brush to remove loose dirt.
    • For heavy grime, gently wash with low-pressure water and mild detergent, then dry thoroughly.
    • A plastic scraper or soft toothbrush can free packed mud avoid metal tools that could damage fins.
  2. Change the engine oil on schedule

    Why:

    Fresh oil reduces internal friction and helps carry heat away from critical parts. Old or degraded oil can increase engine temperature and wear.

    How:

    • Follow the oil change interval in your owner's manual (usually measured in hours or miles).
    • Use the manufacturer-recommended oil viscosity and grade for the CRF110F.
    • Replace the oil filter if the model uses one or according to Honda's recommendations.
  3. Maintain the air filter

    Why:

    A clogged air filter restricts intake airflow, which can make the engine work harder and heat up.

    How:

    • Inspect after muddy or dusty rides.
    • Clean or replace the filter per Honda's schedule. Use the correct filter element and proper filter oil if applicable.
  4. Inspect shrouds, side panels and vents

    Why:

    Bodywork directs airflow around the engine. Damaged or ill-fitting shrouds can reduce cooling efficiency.

    How:

    • Confirm panels are installed correctly and not blocking fins or vents.
    • Repair or replace warped/melted plastic that could restrict airflow.
  5. Check ignition timing & carburetor/fuel injection settings

    Why:

    Running too lean, incorrect timing, or other fuel/ignition issues can cause excessive engine temperatures.

    How:

    • Verify carburetor jetting or EFI mapping is correct for your altitude and mods.
    • If unsure, consult a certified technician or the dealer.
  6. Monitor load and riding conditions

    Why:

    Extended high-load riding (climbing, long steep hills, heavy riders) produces more heat. Short cooling breaks during long hard rides help.

    How:

    • Use appropriate gear to avoid lugging the engine.
    • Allow the engine to cool between extended hard sections when safe to do so.

Tools & supplies you might need

  • Soft brushes and compressed air
  • Mild degreaser and water (for fin cleaning)
  • Owner's manual for oil and filter specs
  • Replacement air filter or filter oil
  • Basic hand tools for panel removal

Quick troubleshooting: is your bike actually liquid-cooled?

If you suspect your CRF110F has a radiator (very unlikely for the 2026 CRF110F), look for:

  • A visible radiator (usually at the front or sides) and coolant hoses.
  • A coolant overflow/reservoir tank and a radiator cap.
  • Hose clamps connecting rubber hoses to the cylinder head or water pump.

If any of the above are present, verify the VIN and model variant there may be regional or aftermarket conversions. For OEM confirmation, check the owner's manual or contact a Honda dealer with your VIN.

By following these proprietary MotoSport instructions, you'll keep your 2026 Honda CRF110F running cool, reliable, and ready for every adventure. When you need fluids, gaskets, or tools, shop parts for your ride now!

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Shop Air Filters for a 2026 Honda CRF110F Dirt Bike

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.