How to Change the Coolant in a 2018 Honda CRF110F
Shop parts for a 2018 Honda CRF110F Dirt Bike.
The 2018 Honda CRF110F is an outstanding entry-level dirt bike, loved for its approachable size, semi-automatic transmission, and legendary Honda durability. Whether you race, trail ride, or just enjoy occasional weekend adventures, keeping the coolant fresh is vital to engine longevity and consistent performance. Here is MotoSport.com's proprietary, step-by-step guide to changing coolant on your CRF110F–with some important specific notes for this model.
Why Change Your 2018 CRF110F Coolant?
- Prevents overheating and potential engine damage during slow trails or hot riding sessions.
- Flushes out corrosion, scale, and contaminants that degrade cooling system performance.
- Extends life of gaskets, seals, and the water pump–the CRF110F's engine depends on a fresh, effective coolant mix.
What You Will Need
- New Honda-recommended coolant (check owner's manual–typically ethylene glycol-based, silicate-free for aluminum engines)
- Basic hand tools (wrench set, screwdrivers)
- Drain pan
- Funnel
- Clean rags
- Distilled water (for rinsing)
- Small syringe or turkey baster (optional for reservoir extraction)
- Gloves & eye protection
Step-by-Step Coolant Change Procedure
- Allow the engine to cool completely before starting. Never open the radiator cap or coolant system when hot–scalding fluid under pressure can cause burns.
- Remove the seat and side panels to access the radiator cap and overflow hose. The 2018 CRF110F uses a compact radiator shielded by the plastic bodywork. Use care with plastic fasteners. Set panels aside.
- Place a drain pan under the water pump or lowest hose junction in the cooling system. Remove the radiator cap by turning counterclockwise. Locate the coolant drain bolt at the base of the water pump or, if unavailable, disconnect the lowest coolant hose with a screwdriver. Allow the coolant to fully drain.
- Flush with distilled water. Reattach the drain bolt or hose, refill with distilled water, run the engine for 2 minutes (with the cap on.) to circulate and mix, then shut down and drain again to remove any old coolant or scale. Repeat if the drained water is cloudy.
- Check and clean overflow tank. On some Honda models, the overflow reservoir requires removing nearby components for complete extraction, but the CRF110F design keeps this fairly accessible. Use a syringe or tube to remove residual coolant and clean the inside if needed.
- Refill with fresh coolant. Insert a funnel at the radiator neck and slowly add the recommended coolant until it reaches just below the filler neck. Squeeze the main coolant hose by hand several times to purge trapped air.
- Bleed air from the system. With the cap off, briefly start the bike and let it idle. As the thermostat opens, you'll see coolant circulating and air bubbles rising. Top up coolant as needed during this process. Turn off the engine if the level drops significantly and refill.
- Replace radiator cap securely, reattach any hoses, and inspect for leaks.
- Reinstall the side panels and seat. Dispose of old coolant safely at a designated collection site–never pour it down the drain or on the ground.
Owner Notes Specific to the 2018 CRF110F
- The CRF110F's cooling system is designed for reliability but always inspect hoses and the radiator during coolant service. Any bulges, cracks, or leaks require immediate attention.
- This model's overflow reserve is typically near the right side–no need to remove the rear shock, unlike some larger models. Use a syringe for easy clean-out if desired.
- Use only silicate-free coolant compatible with aluminum. Honda Genuine Coolant is ideal.
- Coolant capacity is limited, so always check fill height after initial warm-up and top off if needed to ensure full protection.
How Often Should You Change the Coolant?
- For typical use, Honda recommends changing coolant every two years, or more frequently if you ride aggressively or in harsh, muddy conditions.
Keeping up on coolant changes is an essential step in protecting your CRF110F and getting the most fun out of every ride. If you need coolant, gaskets, or new hoses, trust the MotoSport team for the parts and performance upgrades that keep you on the trail–and out of the garage.
Related Shopping Categories
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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.