How to Change the Coolant in Your 2020 Husqvarna FS 450
Shop parts for a 2020 Husqvarna FS 450 Dirt Bike.
Changing the coolant in your 2020 Husqvarna FS 450 is a key part of routine maintenance, ensuring peak engine cooling and longevity. The process is straightforward, but performing each step carefully is critical to avoid air pockets or accidental spills, and to ensure full protection for your high-performance machine. This guide is tailored for FS 450 owners – unique notes about your model are included throughout.
What You’ll Need
- Fresh premixed motorcycle coolant (ensure it meets manufacturer specs, typically ethylene glycol based for FS models)
- Socket wrench set (check for correct drain bolt size, often 8mm or 5/16 inch)
- Clean funnel
- Catch pan
- Protective gloves & eyewear
- Rags for clean-up
Preparation
- Let the engine cool completely before starting.
- Work with the FS 450 upright – use a bike stand for stability.
Step-by-Step Coolant Change Process
-
Remove the Radiator Cap
Locate the radiator cap on the right side behind the front number plate. Remove the cap to release any pressure – never open a hot system. -
Drain the Coolant
Place a catch pan beneath the water pump area on the lower right side. Locate the water pump drain screw. Using your socket wrench, carefully remove the bolt and allow all coolant to drain.
Note: On the FS 450, accessing the drain bolt is streamlined for quick maintenance – but use caution, as coolant flows quickly once the bolt is loosened. -
Flush If Necessary
For thorough maintenance, flush the system with clean water by refitting the drain bolt, refilling the radiator with distilled water, running the engine briefly (do not overheat), then draining again. -
Reinstall the Drain Bolt
Install the drain bolt securely, making sure the crush washer (if equipped) is intact for a snug seal. -
Add New Coolant
Using a clean funnel, pour coolant into the radiator until reaching the finned section. For your FS 450, OEM specification is crucial to maintain optimal operating temperatures under race conditions. -
Bleed the System
Gently rock the bike from side to side and squeeze radiator hoses by hand to help remove air bubbles. Top up coolant again if the level drops. -
Replace the Radiator Cap
Confirm coolant is at the correct level (just above the fins). Refit and tighten the radiator cap securely. -
Test Run & Final Check
Start the engine and allow it to reach operating temperature. Watch for leaks and ensure the radiator fan (if equipped) cycles on. After cooling, recheck level and add coolant if necessary.
Notes Specific to the FS 450
- High-Performance Cooling: The FS 450 features a compact and powerful cooling system designed for elevated RPMs and track use. Always use recommended coolant type and change it regularly, especially if racing or riding in extreme conditions.
- Coolant Choice: Some owners prefer performance coolants like Engine Ice for improved heat management, but always ensure compatibility and avoid mixing different coolant types.
- Environmental Precaution: Coolant is toxic; collect and dispose of old fluid responsibly. Do not pour it down drains.
- Check Hoses – Inspect hose clamps and radiator connections for signs of aging or leaks during service.
Maintenance Tip
Regularly check coolant level before every ride – low coolant is a primary cause of overheating and engine wear in modern dirt bikes like the FS 450.
Related Shopping Categories
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Shop Radiator Hoses for a 2020 Husqvarna FS 450 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.