How to Replace Crf250x Coolant

The CRF250x is a liquid-cooled Honda dirt bike. With just a handful of maintenance items to keep track of, flushing and replacing the coolant once every riding season is an important part of keeping the CRF250x in good working condition. Common coolant issues, including rust, dirt particles, loss due to overheating and coolant degradation, can be solved with a flush-and-refill procedure.

Things You'll Need

  • 12-mm wrench
  • Drain bucket
  • Funnel
  • Coolant or distilled water
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Instructions

  1. Drain Old Coolant

    • 1

      Locate the drain bolt on the bottom right side of the engine. This bolt is the bottom of three bolts that secure the coolant pump casing to the engine.

    • 2

      Place a bucket under the drain bolt.

    • 3

      Unscrew the coolant cap on the top of the radiator. This allows air to move freely and push all coolant out of the engine and radiator.

    • 4

      Remove the drain bolt and allow the coolant to fully drain from the bike.

    • 5

      Replace the drain bolt and tighten it.

    • 6

      Place a funnel into the radiator and pour in your coolant of choice (synthetic or distilled water) until the liquid level reaches the top.

    • 7

      With the radiator cap off, start the bike and crack the throttle a few times to ensure excess air is expelled from the cooling system. Pour in additional coolant if necessary and re-tighten radiator cap.