How to Change the Coolant in Your 2020 Husqvarna FE501S
Shop parts for a 2020 Husqvarna FE501S Dirt Bike.
Regular coolant changes are crucial for keeping your 2020 Husqvarna FE501S running optimally, especially if you ride in challenging off-road conditions. This guide covers step-by-step instructions tailored specifically to your FE501S, including key model-specific considerations that support long-term reliability and engine performance.
Why Change Coolant Regularly?
- Prevents overheating, especially in the high-compression 510.9cc engine used in the FE501S.
- Keeps your cooling system components free of corrosion and sediment build-up.
- Reduces the risk of internal engine damage and maintains maximum efficiency season after season.
Tools & Supplies Needed
- Fresh coolant (check your owner's manual for recommended specs—Engine Ice or high-quality motorcycle-specific coolant is suggested.)
- 8mm socket or wrench
- Drain pan
- Funnel
- Clean water for flushing (distilled is best for the FE501S aluminum radiator system)
- Rags and gloves
Step-by-Step Coolant Change Procedure
-
Prepare the bike
Ensure your FE501S is on a level stand and the engine is completely cool. Remove the skid plate if one is installed – this allows clear access to the drain bolt and prevents coolant from pooling on the hardware or frame. -
Remove the radiator cap
Locate the radiator cap on the right radiator. Slowly turn the cap to the first detent to release any system pressure, then remove completely. -
Drain the old coolant
Locate the coolant drain bolt on the lower right side of the cylinder (often the water pump cover). Position a drain pan beneath, then use an 8mm wrench to remove the drain bolt and sealing washer.
Allow all coolant to fully drain from both radiators. -
Flush the system (Recommended for the FE501S)
Reinstall the drain bolt temporarily and fill the system with clean distilled water. Reinstall the radiator cap. Start the bike and allow it to idle for a minute—this circulates the water. Turn off the engine, allow it to cool, remove the radiator cap, then repeat the drain procedure. This step helps remove any old coolant or sediment, essential for Husqvarna's finely-finned radiator design. -
Inspect
Inspect the sealing washer on the drain bolt; replace if damaged. FE501S owners occasionally experience seepage if reusing a deformed washer. -
Add new coolant
With the drain bolt properly torqued and washer in place, fill the system slowly with fresh coolant using a funnel. Bounce the bike gently or squeeze the radiator hoses to release any trapped air bubbles. -
Check coolant level
Fill until the coolant sits at the base of the filler neck. Reinstall the radiator cap securely. -
Warm up and recheck
Run the engine for several minutes, shut it off, and allow it to cool. Remove the radiator cap and top off if necessary. Inspect for leaks. - Reinstall skid plate and perform a final inspection.
Model-Specific Tips for the 2020 Husqvarna FE501S
- The FE501S uses a lightweight aluminum twin-radiator system with a high-flow water pump. Air pockets can easily cause hot spots in this setup, so thorough burping is especially critical.
- Some owners install upgraded hoses or heat shielding for even better performance in extreme heat – if you've done so, double-check fitment and hose clamp tightness after coolant service.
- Always use motorcycle-specific, silicate-free coolant for the magnesium engine cases and to avoid long-term corrosion.
- The manual specifies approximately 1.2L coolant system capacity for a full drain and refill.
When to Replace Coolant on the FE501S
- At minimum every two years or 20 engine hours for harsh, muddy, or high-heat riding.
- If you notice overheating, discolored old coolant, or frequent fan activation under normal riding conditions.
Changing your coolant regularly helps preserve the remarkable power and reliability of your 2020 FE501S. Take your time with bleeding the cooling system – overheating issues are quickly solved with proper maintenance and the right parts.
Related Shopping Categories
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Shop Tools for a 2020 Husqvarna FE501S Dirt Bike.
Shop Radiator Hoses for a 2020 Husqvarna FE501S 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.