How to Change the Coolant in a 2020 Husqvarna FC450 Rockstar Edition
Shop parts for a 2020 Husqvarna FC450 Rockstar Edition Dirt Bike.
Maintaining the cooling system of your 2020 Husqvarna FC450 Rockstar Edition ensures optimal performance and protects your engine from overheating. This guide provides a MotoSport-exclusive step-by-step process to change the coolant in your FC450 Rockstar Edition, including special considerations for this advanced motocross machine.
What Owners Should Know About the FC450 Rockstar Edition
The 2020 FC450 Rockstar Edition features an updated engine map for more aggressive yet controllable power delivery, WP Xact air fork and shock upgrades for improved handling, and a high-performance liquid-cooled SOHC single-cylinder engine. These factory upgrades make smooth cooling system operation even more critical for reliability and top-tier performance.–Notably, maintaining the correct coolant level and quality directly benefits the bike's advanced thermal management system and engine longevity.
Tools & Supplies Needed
- Fresh motorcycle-compatible coolant (ethylene glycol based, premixed or mix with distilled water following instructions)
- Ratchet and socket set
- Large drain pan
- Flat blade screwdriver
- Clean rags
- Funnel
- Gloves and eye protection
Step-by-Step Coolant Change Process
-
Preparation
- Ensure the bike is completely cool before servicing.
- Secure the motorcycle upright on a stand.
- Remove the seat and right side cover by disengaging the holding lugs and lifting upward.– -
Access the Radiator Cap
- Locate and remove the radiator cap carefully to release any residual pressure.
- The radiator cap is typically on top of the left side radiator.– -
Drain the Old Coolant
- Place the drain pan under the water pump (lower right engine case).
- Use a socket to remove the coolant drain bolt at the bottom of the water pump housing.
- Allow coolant to fully drain. Open the radiator cap fully to speed up draining.
- Inspect the old coolant for signs of oil contamination or debris, which could indicate larger engine issues.– -
Flush the System (Recommended)
- If the coolant is dirty, pour distilled water through the system before reinstalling the drain bolt.
- Reinstall the bolt, fill with distilled water, let the motorcycle idle for a short period (do not let it overheat), then drain again.
- Repeat until water runs clear.– -
Refilling with New Coolant
- Ensure the drain bolt is torqued to manufacturer specification.
- Slowly pour in new coolant until it reaches the bottom of the radiator neck/fins.
- Gently rock the bike side to side to eliminate air pockets.
- Replace the radiator cap securely.– -
Check for Leaks & Circulate Coolant
- Start the bike and let it idle. Watch coolant level as any trapped air escapes; top off if necessary.
- Shut the engine down, allow to cool, and recheck level.– -
Reinstall Side Cover & Seat
- Fit the right side cover and seat back into position, making sure all lugs engage securely.– -
Proper Disposal
- Dispose of the old coolant according to local environmental regulations.–
Key Model-Specific Tips
- The FC450 Rockstar Edition's advanced cooling system uses high-efficiency radiators with a low coolant capacity, making correct fill quantity importantnever overfill.
- Always use a high-performance coolant suitable for aluminum radiators and high-output race engines.
- Inspect hoses and radiator cap for wear; leaks can result in serious engine damage under high load.
- Model-specific plastics and the updated radiator shrouds may require extra care when removing and reinstalling covers—avoid excessive force to prevent cracking components.
Why Routine Coolant Changes Matter
High-output engines like the FC450's run hotter than most, especially under hard racing conditions. Regular coolant changes help prevent corrosive buildup, overheating, and cavitation–protecting your investment and maintaining consistent engine performance.
Related Shopping Categories
Shop Radiators for a 2020 Husqvarna FC450 Rockstar Edition Dirt Bike.
Shop Coolant for a 2020 Husqvarna FC450 Rockstar Edition Dirt Bike.
Shop Temperature Sensors for a 2020 Husqvarna FC450 Rockstar Edition Dirt Bike.
Shop Tools for a 2020 Husqvarna FC450 Rockstar Edition Dirt Bike.
Shop Radiator Hoses for a 2020 Husqvarna FC450 Rockstar Edition 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.