How to Change the Coolant in a 2022 Honda CRF250F

Shop parts for a 2022 Honda CRF250F Dirt Bike.

Keeping your 2022 Honda CRF250F running strong and protected from engine heat starts with properly maintaining the cooling system. Regular coolant changes help avoid overheating, corrosion, and premature engine wear. Here is a robust, MotoSport-exclusive step-by-step guide to changing your coolant on this model – and a few insider tips specific to the CRF250F to keep your next ride trouble-free.

What You Need

  • Silicate-free motorcycle coolant (premixed or ready-to-add blend recommended for modern Hondas)
  • Phillips head screwdriver
  • 8mm and 10mm sockets with ratchet
  • 5mm Allen/hex key
  • Drain pan
  • Funnel
  • Paper towels or rags
  • New crush washer for the drain bolt (optional but recommended)

Step-By-Step Coolant Change Guide

  1. Let the engine cool fully. Never attempt this job when the engine is hot. Wait for everything to reach room temperature to avoid injury when opening the radiator cap and to prevent warping engine parts.
  2. Prep the bike and access the radiator.
    • If present, carefully remove the seat and side panels on the right side using the 5mm Allen key and 8mm or 10mm sockets. This provides clear access to the radiator and drain bolt.
  3. Remove the radiator cap. Use a Phillips head screwdriver to remove the set screw before twisting the radiator cap off. Only do this once you are confident the system is cool – a hot system can spray scalding coolant.
  4. Position your drain pan underneath the water pump area.
  5. Locate and remove the coolant drain bolt.
    • The drain bolt is found at the bottom of the water pump, below the right-side engine case. Be prepared for the coolant to drain quickly.
    • Remove the bolt, allowing all coolant to empty into your drain pan. Inspect or replace the crush washer if you're looking for a leak-free seal at reassembly.
  6. Flush (optional): If the old coolant looks especially dirty, flush the system with distilled water before refilling. Reinstall the drain bolt & washer and torque to spec.
  7. Refill the radiator with new coolant.
    • Use a funnel to carefully pour coolant into the radiator filler neck until it reaches the bottom of the filler neck (do not overfill).
  8. Bleed the system.
    • With the cap still off, lean the bike gently side to side or tap the hoses to dislodge air bubbles. If possible, briefly start the engine and run it at idle until the thermostat opens, allowing air to escape; then top off coolant as needed.
  9. Secure the radiator cap. Reinstall the cap firmly – an improper seal will cause coolant loss and possible engine overheating.
  10. Reinstall bodywork and check levels. Refit the side panels and seat. After your next ride, check the coolant level again and top off if needed as small air bubbles may still vent out.

MotoSport Insights: 2022 CRF250F Coolant Notes

  • The CRF250F uses just under 1 quart of coolant during a change (0.98 US qt/0.93 liters at coolant change).
  • A small amount of coolant (roughly 0.7 – 2.0 US oz) loss through the overflow tube is normal when hot riding, but frequent drops or rapid decrease means the cooling system should be checked for leaks or a failing radiator cap.
  • This Honda's design places the drain bolt in an easily accessible position, so you do not need to dismantle the whole bike to change the coolant—making regular maintenance much less of a hassle.
  • Always inspect hoses and clamps for swelling or cracking when performing a coolant change. Deteriorated hoses are a common cause of expensive overheating damage.
  • Use only silicate-free coolant specifically for modern aluminum dirt bike engines to prevent internal corrosion and clogging.

When Should You Change Your Coolant?

  • Honda recommends changing the CRF250F's coolant every two years, or more frequently if you notice discoloration, particulate, or after extreme riding conditions.

Replacing your CRF250F's coolant is a quick and essential job to ensure every trail ride is as fun as the first.

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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.