How to Change the Coolant in a 2019 Honda CRF250L
Shop parts for a 2019 Honda CRF250L Dirt Bike.
Maintaining the cooling system in your 2019 Honda CRF250L ensures consistent engine performance and longevity on and off the trail. Honda recommends changing the coolant every 2 years or 24,000 miles, whichever comes first. This guide walks you through each step to properly change the coolant, highlights specific details important for this model, and provides practical tips unique to the CRF250L.
Why Coolant Change Matters on the CRF250L
The 2019 Honda CRF250L features a liquid-cooled, fuel-injected engine. Regular coolant replacement protects the engine from overheating, corrosion, and freezing, all of which are crucial for dirt bikes exposed to harsh environments. Running old or contaminated coolant can cause premature wear of internal components and increase the risk of overheating on demanding rides.
Tools & Supplies You Will Need
- Antifreeze (50/50 premixed, silicate-free, with corrosion inhibitors)
- Small funnel
- 5mm Allen key
- 8mm and 10mm sockets, ratchet
- Phillips head screwdriver
- Drain pan and paper towels
- Replacement crush washer for drain bolt
- Gloves and shop rags
Step-by-Step Coolant Replacement Guide
- Cool Down the Bike:
Ensure the CRF250L is completely cool to avoid burns. Never open the radiator cap on a hot engine. - Position the Bike:
Place the bike securely on a stand or level ground. - Remove Plastics:
Remove the top 5mm Allen bolt from the left radiator shroud to access the radiator cap. On the right, remove 4 screws (5mm/Phillips as appropriate) and two plastic retainers. If your CRF250L has an aftermarket skid plate, it may require additional steps and tools for removal. - Remove Reservoir Bolts:
Use a 10mm socket to remove the two bolts securing the coolant reservoir on the right side. - Remove the Radiator Cap:
Loosen the set screw (usually Phillips) and remove the radiator cap carefully. - Drain the Old Coolant:
Locate the coolant drain bolt at the bottom of the water pump (usually on the right engine case). Use an 8mm socket to remove the bolt and allow the old coolant to fully drain out into a suitable container. Replace the crush washer on the bolt for a leak-free seal. - Flush (if necessary):
If the coolant is heavily contaminated, flush the system with distilled water. Reinstall the drain bolt and torque it to factory spec. - Refill with New Coolant:
Use a funnel to fill the radiator slowly with fresh, premixed silicate-free coolant. Fill until the radiator is full and the coolant is visible at the base of the filler neck. - Fill Reservoir:
Check the overflow reservoir. Fill it to the "Full" line. - Reassemble:
Replace all plastics, radiator cap, and skid plate (if removed). Be sure everything is secure. - Burp the System:
Start the engine and let it idle until it reaches normal temperature. Shut it off, let it cool completely, then recheck coolant level in both the radiator and reservoir. Top off if needed to account for air pockets. - Check for Leaks:
Inspect all areasspecifically the drain bolt and connection pointsfor leaks. - Dispose of Old Coolant Properly:
Never pour coolant down the drain or onto the ground. Take it to an approved recycling center.
2019 CRF250L-Specific Tips & Notes
- The radiator on the CRF250L is partially shielded by shrouds and frame elements, making removal of plastics necessary for direct access.
- The coolant system is designed for compact off-road use, so always use a silicate-free coolant to prevent micro-abrasion of water pump seals.
- Honda crush washers for the drain bolt are single use—replace each time you change the coolant for a secure, drip-free seal.
- Routine checks for dirt and mud accumulation around the radiator and reserve tank are highly recommended, especially after off-road rides.
- Monitor the coolant level after your first ride post-change, as trapped air could cause minor drops in the level as it is purged naturally from the system.
Conclusion
Changing the coolant is one of the most important, yet straightforward, maintenance tasks for your 2019 Honda CRF250L. Following this guide will help you ride with confidence, knowing your engine is well-protected. For quality OEM and aftermarket parts ahead of your next maintenance project, MotoSport has everything you need to keep your machine running strong.
Related Shopping Categories
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Shop Radiator Hoses for a 2019 Honda CRF250L 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.