How to Change the Coolant in a 2016 Husqvarna FC450HQ

Shop parts for a 2016 Husqvarna FC450HQ Dirt Bike.

Regularly changing the coolant in your 2016 Husqvarna FC450HQ is crucial for optimal engine performance, longevity, and to prevent overheating during aggressive rides. While this model is engineered for racing and high-performance off-road use, proper maintenance of the cooling system will keep your bike at peak levels on the track or trail.

What You'll Need

  • Fresh motorcycle-specific coolant (avoid automotive coolant or tap water–prefer premixed or distilled water mix)
  • Socket set and basic hand tools
  • Drip pan or suitable container
  • Funnel
  • Clean rags
  • Gloves and eyewear for safety

Step-by-Step Coolant Change Procedure

  1. Let the bike cool completely. Removing coolant from a hot engine can cause injury and release steam–wait until the engine feels cold.
  2. Secure the bike upright on a level surface or a stand to ensure all coolant drains properly.
  3. Remove radiator shrouds (if needed)–some plastics may block access.
  4. Locate the coolant drain bolt or water pump cover. On the FC450HQ, this is typically on the lower right sidecover or at the water pump. Place a suitable container beneath to catch the old coolant.
  5. Remove the radiator cap to release pressure, then remove the drain bolt. Allow all the coolant to drain out. If you want a thorough flush, pour a small amount of clean distilled water into the system, install the drain bolt, and run the bike briefly before draining again.
  6. Inspect the old coolant for debris or oily residue, which may indicate other problems needing attention.
  7. Reinstall the drain bolt (use a fresh sealing washer if possible) and torque to the specification for your bike.
  8. Fill the radiator with fresh coolant slowly using a funnel to the bottom of the filler neck.
  9. "Burp" the cooling system. With the cap off, start the engine and let it idle for a few minutes, gently rocking the bike or blipping the throttle to free any trapped air bubbles. Top off the coolant as the level drops.
  10. Replace the radiator cap securely, reinstall any removed plastics, and wipe down any spills.
  11. Run the engine and check for leaks around the drain bolt and water pump. Once cooled again, re-check the coolant level and top off if necessary.

Unique Tips for the 2016 Husqvarna FC450HQ

  • The FC450HQ's high-compression engine and advanced cooling system are sensitive to coolant quality–only use recommended, aluminum-safe coolants to prevent corrosion and deposits.
  • Many aftermarket additives and non-motorcycle coolants can cause premature water pump seal wear.
  • If you've recently had a tip-over or frequent overheating, inspect radiator guards and hoses for damage or kinks that might reduce flow.
  • This model's radiator cap is designed for higher pressure–avoid swapping with generic caps.

Disposal and Safety

  • Dispose of old coolant safely at a recycling center–coolant is toxic to people and pets.
  • Always store new and used coolant away from children and animals.

Keeping your 2016 Husqvarna FC450HQ's coolant fresh prevents costly repairs and keeps you performing at your best. For OEM parts and premium maintenance products, rely on MotoSport to keep your ride race-ready.

Related Shopping Categories

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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.