How to Change the Coolant in a 2017 Husqvarna FS 450 – MotoSport.com Guide
Shop parts for a 2017 Husqvarna FS 450 Dirt Bike.The 2017 Husqvarna FS 450 is a high-performance supermoto machine featuring a potent 450cc engine and a robust cooling system designed for both competitive tracks and aggressive riding. Proper coolant maintenance is essential to keep your FS 450 running efficiently and to prevent overheating or engine damage.
Follow this proprietary MotoSport coolant change procedure developed specifically for Husqvarna FS 450 owners:
What You–ll Need
- Quality motorcycle-specific coolant (silicate-free, ready-mix or concentrate as per label)
- Clean container for old coolant
- Distilled water
- Appropriate wrenches/socket set (usually 8mm or 10mm for drain bolt)
- Shop towels and rubber gloves
- Torque wrench (recommended for reinstalling bolts)
Step-by-Step Instructions
- Ensure the bike is fully cooled down. Never remove the radiator cap or coolant drain bolt when the engine is hot – wait until it is cold to the touch to avoid burns and high pressure spray.
- Secure the bike upright, ideally on a stand to keep it level. This will ensure a thorough coolant drain and proper refill.
- Remove the radiator cap slowly to release any residual pressure. The cap is on the left-hand side, slightly under the shroud.
- Locate the coolant drain bolt on the right side of the engine, typically on the lower water pump housing. Place a drain pan underneath to catch old coolant.
- Remove the drain bolt and let all coolant flow out. Gently rock the bike side-to-side to help empty both radiators completely. Check for a small O-ring on the bolt and inspect it–replace if damaged.
- Flush the system (recommended): Temporarily reinstall the drain bolt and fill the radiators with distilled water. Reinstall the radiator cap, run the engine briefly (15-30 seconds, do not overheat), then shut off and drain the water. Repeat this flush until the water runs clear.
- Reinstall the drain bolt – torque to manufacturer spec (usually around 6-8 Nm). Do not overtighten, as the water pump housing is aluminum and may strip.
- Add new coolant until just below the base of the radiator filler neck. Allow bubbles to escape and tap the hoses lightly with your fingers to help release trapped air.
- Start the engine with the radiator cap off and let it idle for 1-2 minutes to help purge any remaining air. Watch for coolant movement and air bubbles. Top up as needed, then reinstall and tighten the cap.
- Check coolant level after first ride: Once the engine is cold, recheck the coolant, top off if necessary, and inspect for leaks around the drain bolt and radiator cap.
FS 450 Model-Specific Notes & Best Practices
- The 2017 FS 450 shares cooling hardware with KTM models, so many coolant maintenance procedures are compatible. However, note that the FS 450 is tuned for high output and may generate more heat than enduro models.
- Always use a silicate-free motorcycle-specific coolant to prevent water pump wear & internal scaling.
- Inspect radiator hoses for brittleness or cracking – replace if needed, as supermoto use can stress cooling components.
- If your bike sees hard track use or high-temp conditions, consider upgrading to high-performance coolant or adding a radiator fan kit for improved temperature control.
Regular coolant changes (at least yearly, or more often in severe use) keep your FS 450 running strong and extend the life of engine components. If you notice persistent overheating despite fresh coolant, inspect the radiator for clogging, check for proper thermostat function, and verify there are no leaks or head gasket issues.
Related Shopping Categories
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Shop Radiator Hoses for a 2017 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.