How to Change Coolant in a 2019 Honda CRF250R
Shop parts for a 2019 Honda CRF250R Dirt Bike.
Changing the coolant in your 2019 Honda CRF250R is critical for reliable engine cooling and overall performance, especially under high stress. While the procedure is straightforward, correctly performing each step will help your bike stay in peak condition.
What Makes the 2019 CRF250R Coolant Service Unique?
The 2019 CRF250R uses an advanced cooling system tailored to competitive riding. Unlike some older models, it relies on a high-capacity, dual-radiator setup designed for the heat of motocross action. Always use a silicate-free, motorcycle-specific coolant for compatibility and corrosion protection. Be sure to check for factory-recommended torque specs and crush washers when reinstalling bolts, as overtightening or reusing hardware may cause leaks or damage.
Tools & Supplies
- Silicate-free motorcycle coolant
- Ratchet with 8 mm & 10 mm sockets
- Allen key (typically 5 mm for plastics)
- Phillips-head screwdriver
- Funnel
- Drain pan
- Replacement crush washer for drain bolt (recommended)
- Clean rags or towels
Step-by-Step Coolant Change Guide
- Ensure bike is cool. Let the motorcycle sit until the engine and radiator are completely cooled to prevent burns from hot coolant under pressure.
- Remove the radiator shrouds. Use your 5 mm Allen key and 8 mm/10 mm sockets to remove the radiator shroud bolts and side panel as needed for radiator access. Take care not to strip hardware; note that the factory sets these bolts to 7 lbf–ft to 3.8 lbf–ft depending on location.
- Remove the radiator cap. Loosen and remove the cap to relieve system pressure and allow proper draining.
- Locate the drain bolt. On the 2019 CRF250R, the coolant drain bolt is near the water pump on the bottom right side of the engine case - easily accessible without extensive disassembly.
- Position a drain pan. Place it directly under the drain bolt area.
- Remove the drain bolt and crush washer. Allow all old coolant to fully exit. Inspect the crush washer and replace if damaged or flattened.
- Flush the system (recommended). If switching coolant types or if debris is visible in drained coolant, temporarily reinstall the drain bolt and fill the radiator with distilled water, then drain again fully to remove contaminants.
- Reinstall drain bolt with new washer. Tighten to spec: do not overtighten.
- Fill with fresh coolant. Use a funnel to fill through the radiator neck slowly. The system should be filled up to the bottom of the filler neck.
- Bleed trapped air. Carefully tilt the bike 20° to both left and right several times, per the CRF250R owner's manual guidance, to help release trapped air bubbles from the cooling passages. Recheck coolant level and top up as needed.
- Reinstall the radiator cap. Ensure it is secure.
- Reassemble plastics. Reverse steps to reinstall shrouds and side panels, ensuring all tabs and fasteners are properly seated.
- Start engine and warm up. Run the bike gently, allowing it to reach full operating temperature. Shut off and let cool, then check and adjust coolant level once more, topping up as required.
Owner Notes & Tips
- NEVER open a hot radiator cap—always let the bike cool first.
- Avoid automotive coolants with silicates; they can damage the water pump and aluminum cooling passages in your CRF250R.
- Always dispose of old coolant responsibly. Used coolant is hazardous to pets & the environment; collect and take to a recycling center.
- The 2019 CRF250R is highly sensitive to coolant quality and level. Underfilling or running with air pockets may result in overheating or engine damage.
- Check hoses, clamps, and the radiator cap for wear or leaks during each service.
- Honda recommends changing coolant at regular intervals, even if mileage is low.
Routine coolant replacement keeps your 2019 Honda CRF250R performing at its best—crucial for demanding riders who expect reliability everywhere from the MX track to the trail.
Related Shopping Categories
Shop Radiators for a 2019 Honda CRF250R Dirt Bike.
Shop Coolant for a 2019 Honda CRF250R Dirt Bike.
Shop Temperature Sensors for a 2019 Honda CRF250R Dirt Bike.
Shop Tools for a 2019 Honda CRF250R Dirt Bike.
Shop Radiator Hoses for a 2019 Honda CRF250R 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.