How to Change the Coolant in a 2022 KTM 350XCFW

Shop parts for a 2022 KTM 350XCFW Dirt Bike.

The 2022 KTM 350XCFW is known for its high-performance engine and competition-focused chassis, making regular maintenance crucial. Coolant changes are especially important to ensure reliability and to prevent overheatingan issue that can be catastrophic on long or technical rides. Here is MotoSport's definitive guide for safely replacing the coolant on your 2022 KTM 350XCFW.

What You'll Need

  • Fresh coolant compatible with aluminum engines (KTM recommends using a high-quality ready-to-use coolant; check your owner's manual for specifications.)
  • 8mm socket or wrench
  • Catch pan or suitable container
  • Funnel (optional, but recommended for easy pouring)
  • Shop rags
  • Protective gloves and eye protection

Step 1: Preparation

  • Ensure the motorcycle is completely cool before you begin; never open the radiator cap on a hot engine to avoid burns or scalding coolant spray.
  • Secure the bike on a stand, keeping it upright and level to maximize coolant drainage.

Step 2: Access the Cooling System

  • Remove the seat and, if applicable, the side shrouds to expose the top of the left radiator.
  • Place your catch pan beneath the right side of the engine where the water pump drain bolt is located.
  • Slowly remove the radiator cap using a rag to manage any residual pressure.

Step 3: Drain Old Coolant

  • Use the 8mm socket to remove the coolant drain bolt at the water pump area on the right side of the engine.
  • Allow the coolant to fully drain. Tilting the bike slightly side-to-side can help evacuate more old coolant.
  • If you want to perform an extra-thorough flush, fill the cooling system with distilled water, replace the cap and drain bolt, briefly run the engine (just until warm, not hot), then repeat the above drain steprepeat until the drained water is clear.

Step 4: Inspect and Clean

  • While draining, inspect the exited fluid for debris or sediment.
  • Take a moment to check and carefully straighten any bent radiator fins, and clear away mud or buildup using compressed air or a soft brush to maximize heat transfer efficiency.

Step 5: Refill with Fresh Coolant

  • Reinstall and torque the drain bolt to factory specification.
  • Begin slowly filling the radiator with the recommended coolant using a funnel; fill to just below the neck of the cap opening.
  • To prevent air pockets, occasionally rock the bike gently and squeeze the coolant hoses as you pour.
  • On some models, especially KTM 350s, it's advised by the manufacturer to elevate the front wheel (about 19 inches) and to use the cylinder bleed screws if fitted, to ensure complete bleeding of the system.
  • Top off the coolant as necessary, then securely replace the radiator cap, ensuring it is locked by twisting it until you feel two clicks.

Step 6: Final Checks

  • Clean up any spillage and replace all removed parts and panels.
  • Start the engine, let it idle, and monitor for any leaks or signs of overheating.
  • Once the bike has cooled, recheck the coolant level and top off if required; as air works its way out, a small loss in level is normal on the first heat cycle.

Things KTM 350XCFW Owners Should Know

  • Bleeding the system properly is crucial. Air pockets can create hot spots and cause the fan to kick on more often than normal. If the overflow reservoir fills too quickly or you suspect trapped air, re-bleed the system before riding hard.
  • KTM recommends checking and cleaning radiator fins regularly, especially if you ride in muddy or sandy environments. Bent fins or mud buildup can rapidly increase engine temperatures.
  • Consider coolant designed for high-performance and off-road motorcycles–this can help with heat dissipation and anti-corrosion, both important for longevity if you push your 350XCFW in aggressive conditions.
  • Changing the coolant is part of recommended periodic maintenancerefer to your owner's manual for the service interval specific to your 2022 KTM 350XCFW.

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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.