How to Change the Coolant in a 2022 Honda CRF125F: A MotoSport Guide
Shop parts for a 2022 Honda CRF125F Dirt Bike.
The 2022 Honda CRF125F is an exceptionally reliable trail bike, but like all liquid-cooled engines, it relies on fresh coolant to keep engine temperatures optimal and performance consistent. Over time, old coolant loses its ability to protect the engine from heat and corrosion–making regular coolant changes a must for anyone looking to maximize the life and reliability of their CRF125F.
Before You Begin: What to Know About the CRF125F
- Model Specifics–The CRF125F is designed for off-road only with a compact liquid-cooled, single-cylinder engine. The cooling system is robust but sensitive to neglect.
- Access to Radiator Cap–The radiator is stationed beneath shrouds that require side panel removal to access. For the 2022 model, Honda made this process straightforward with minimal fasteners and quick-release features on the left side cover.
- Coolant Type–Use only high-quality, silicate-free motorcycle coolant. Pre-mixed options are safest, as improper mixture ratios may damage the aluminum components inside the CRF125F's cooling system.
Step-by-Step Coolant Change for the 2022 CRF125F
-
Prep the Bike & Work Area
Ensure your engine is cool before starting. Place the bike securely on a stand and have a drain pan ready. -
Remove the Left Side Cover
Loosen and remove bolt A, bolt B, and their collar from the left panel. Gently pull out the prong from the rubber grommet and the boss from the shroud. This exposes the radiator and fill cap–reference your owner's manual for panel illustration. -
Remove the Radiator Cap
With the cover off, slowly remove the radiator cap to release any residual pressure in the system. -
Drain the Old Coolant
Locate the coolant drain bolt on the water pump housing (usually near the lower right-side case). Place your drain pan underneath, loosen the drain bolt, and allow all coolant to flow out. For best results, tilt the bike gently to evacuate trapped fluid from the system. Reinstall the drain bolt once draining is complete and torque to specification. -
Flush If Needed (Optional but Recommended)
Pour distilled water through the radiator fill neck and let it drain to remove residual debris or old coolant. Repeat until clear water comes out, then drain completely. -
Add New Coolant
Using a funnel, pour the manufacturer-recommended coolant into the radiator until it reaches the bottom of the filler neck. Fill the reserve tank to the indicated line as well. -
Vent Air from the System
Reinstall the radiator cap, start the bike, and let it idle up to operating temperature–this will circulate coolant and purge air pockets. Shut off and allow it to cool fully. Remove the cap again and top off as needed. Also re-check the overflow tank and adjust the level if necessary. -
Reinstall Side Cover
Secure the cover by inserting the prong and boss into the appropriate grommet and hole on the shroud. Install the collar and fasteners, tightening them securely. -
Inspect for Leaks & Final Check
Inspect around all coolant joints and the drain plug for tightness or seepage. Double-check that the radiator and coolant tank are at their correct levels.
CRF125F Owner Tips & Reminders
- Dispose of old coolant responsibly–coolant is toxic to animals and harmful to the environment.
- Check the coolant level before every major ride or race session to avoid overheating.
- If you ride aggressively or in hot environments, consider changing coolant more frequently than the service manual recommends.
- The CRF125F's aluminum components require non-silicate formulas–using car antifreeze may cause premature corrosion or gasket failure.
Staying on top of coolant service is a simple way to safeguard your Honda CRF125F's performance and longevity. Regular checks and maintenance keep you riding – and prevent expensive repairs down the line.
Related Shopping Categories
Shop Radiators for a 2022 Honda CRF125F Dirt Bike.
Shop Coolant for a 2022 Honda CRF125F Dirt Bike.
Shop Temperature Sensors for a 2022 Honda CRF125F Dirt Bike.
Shop Tools for a 2022 Honda CRF125F Dirt Bike.
Shop Radiator Hoses for a 2022 Honda CRF125F 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.