How to Change the Coolant in a 2025 Honda CRF110F
Shop parts for a 2025 Honda CRF110F Dirt Bike.
Keeping your 2025 Honda CRF110F running strong means regular coolant changes, ensuring reliable engine temperature control in all riding conditions. Here is MotoSport's proprietary step-by-step guide to changing the coolant in your CRF110F, with specific notes on this model to help owners maintain peak performance.
Why Change the Coolant?
Coolant protects your CRF110F from overheating, corrosion, and freeze damage. Over time, coolant degrades and becomes less effective, so regular replacement is essential– especially for youth and trail bikes like the CRF110F that can sit unused between rides or face harsh conditions.
What You Will Need
- New Honda-compatible coolant (standard pre-mix or specified for aluminum engines)
- An appropriate drain pan
- 8mm and 10mm sockets or wrenches
- Rags and gloves
- Fresh water (distilled recommended), if flushing the system
- Funnel or squeeze bottle for refilling
Step-by-Step Coolant Change
- Let the engine cool completely. Never open the radiator cap on a hot engine; the system is pressurized and can cause burns.
- Set the bike upright on a level surface. Use a stand to keep it secure and vertical.
- Remove the seat and side panels as needed to access the radiator cap and drain bolt. The CRF110F is a compact design, so some plastics may need removal for easier access.
- Place a drain pan underneath the water pump area. Locate the coolant drain bolt on the right side of the motor or at the bottom of the water pump cover.
- Remove the radiator cap to allow airflow and better draining.
- Using an 8mm or 10mm wrench, remove the coolant drain bolt. Also remove the sealing washer.
- Let the coolant drain completely. For a more thorough flush, pour distilled water through the radiator and let it drain out. Repeat until the water runs clear.
- Inspect the sealing washer. Replace if damaged.
- Reinstall the drain bolt. Tighten securely–do not overtighten, as the aluminum threads can strip. Reference your service manual for proper torque values.
- Slowly pour new coolant into the radiator. Fill up to the top of the radiator neck. Pause to let bubbles escape and top off as needed.
- Reinstall the radiator cap securely.
- Start the engine and let it idle for a few minutes. With the bike upright, squeeze the radiator hoses to encourage trapped air to purge. Shut down the engine, let it cool, and check the coolant level again. Add coolant to the correct level if needed.
- Reinstall all panels and the seat.
- Dispose of the old coolant safely. Used coolant is toxic–take it to a recycling center or auto shop that handles hazardous materials.
Model-Specific Tips for the 2025 CRF110F
- Small-capacity cooling system–avoid overfilling, and check levels regularly after the first few rides.
- This model is air-cooled and may not have a traditional liquid-cooling system in standard trim. If your CRF110F is equipped with an aftermarket radiator kit, follow those kit-specific instructions for draining and filling coolant. Always verify if your version has a radiator before starting service.
- Inspect hoses and the radiator cap–replace if any signs of wear, cracks, or loose fitment appear. Use only plastics-safe coolant for models with non-metallic radiators.
- Maintain regular service intervals and consider coolant changes ahead of extreme temperature riding or long storage.
Final Inspection
After riding a few minutes post-service, let the bike cool, check for leaks, and double-check the fill level. Address any issues promptly to safeguard your engine and keep your next ride worry-free.
Related Shopping Categories
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Shop Tools for a 2025 Honda CRF110F Dirt Bike.
Shop Radiator Hoses for a 2025 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.