How to Change the Coolant in a 2020 Husqvarna FX350: A MotoSport Exclusive Guide
Shop parts for a 2020 Husqvarna FX350 Dirt Bike.
Routine coolant changes are crucial for keeping your 2020 Husqvarna FX350 running cool and performing at its best, whether you're hitting tight trails or open desert tracks. This exclusive MotoSport guide walks you through the complete process, highlighting tips specific to the FX350 so you can ride with confidence and protect your investment.
What Makes the 2020 FX350 Coolant System Unique?
- High-Performance Engine: The FX350 shares much of its architecture with other Husqvarna/KTM 350 models, but it's calibrated for off-road racing, meaning thermal management is especially important.
- No Factory Coolant Recovery Bottle: Unlike some street-legal Husqvarna models, the FX350 does not include a coolant overflow reservoir stock. Maintaining proper coolant levels is critical to avoid overheating issues, especially in technical riding or hot weather.
- Access Points: The radiator layout, water pump cover, and drain bolt are conveniently placed, simplifying the draining and filling process for home mechanics.
Tools & Supplies You'll Need
- 8mm or 10mm socket (for water pump cover drain bolt)
- Catch pan for old coolant
- New coolant (choose a ready-to-use, high-performance motorcycle coolantavoid mixing brands/types)
- Funnel and clean water (for system flush, optional)
- Torque wrench (recommended)
- Shop towels and gloves
Step-by-Step Coolant Change Process
- Start with a Cool Engine. Never open your cooling system when the engine is hot to avoid burns or pressure-related spills.
- Stabilize the Bike. Stand your FX350 upright on a level surface or center stand.
- Remove the Radiator Cap. The radiator cap is typically located on the right radiator. This releases pressure and prepares the system for complete drainage.
- Locate the Drain Bolt. Find the water pump covertypically on the right side of the engine near the bottom. Use the 8mm or 10mm socket to remove the drain bolt and let all coolant drain into your catch pan.
- Flush the System (Optional but Recommended). If switching coolant types or after overheating/contamination, fill the radiators with clean distilled water, reinstall the drain bolt, and run the engine for 30 seconds. Shut down, allow to cool, and repeat the drain step to remove remaining debris/old coolant.
- Inspect and Reinstall the Drain Bolt. Inspect the bolt and its washer or O-ring for damage. Replace if needed. Torque to manufacturer spec (typically around 10 Nm or 7.4 lbf ft).
- Refill the Coolant. Slowly add new coolant through the radiator opening until full. On some bikes, you'll find a small bleed screw on the cylinder head to help purge trapped air–if present, slightly crack this screw as you fill until coolant flows steadily, then retighten.
- Check for Air Pockets. After filling, leave the radiator cap off and gently rock the bike side-to-side. Blip the throttle a couple times (engine off) to release trapped air. Top off coolant as needed.
- Reinstall the Radiator Cap. Secure the cap tightly.
- Start the Engine & Check Levels. Run the engine at idle until it reaches operating temperature (fan may kick on if equipped). Shut off, allow to cool, and recheck coolant level. Top off as needed.
- Dispose of Old Coolant Properly. Old coolant is toxic–take it to a recycling center or hazardous waste facility.
Pro Tips for FX350 Owners
- Check the radiator fins for dirt or mud build-up after each ride. Clean thoroughly to maximize cooling and airflow.
- If riding in exceptionally hot or demanding conditions, inspect your coolant level more frequently and consider carrying extra in your gear bag.
- Upgrading to a higher-performance coolant, such as Engine Ice or equivalent, can offer better temperature stability for the FX350's high-revving engine.
- If your FX350 doesn't have an auxiliary fan but you ride slow/enduro terrain, consider installing one for added thermal protection.
Maintaining Peak Performance
Changing coolant at regular intervalstypically once per year, or more often if riding in harsh conditionsprevents corrosion, overheating, and internal engine damage. Mapping out this simple maintenance task means your 2020 Husqvarna FX350 is ready for its next MotoSport adventurefor many miles to come.
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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.