How to Change the Coolant in a 2021 Husqvarna FE501HQ
Shop parts for a 2021 Husqvarna FE501HQ Dirt Bike.
Maintaining the coolant system in your 2021 Husqvarna FE501HQ is crucial for engine reliability and optimal performance in hard off-road riding. Below is a proprietary MotoSport step-by-step guide tailored to this exact model, including special notes and tips every owner should know about the FE501HQ.
What You Need
- Fresh coolant (check manual for recommended type; typically 1.2L for this bike)
- Socket set and wrench
- Drain pan
- Funnel
- Shop towels
- New seal ring for drain bolt (recommended)
- Distilled water (optional, for flushing)
Instructions
- Preparation
- Ensure the engine is completely cool before starting hot coolant can burn.
- Stand the FE501HQ upright on a level surface.
- Access the Cooling System
- Remove necessary plastics or skid plate for easy access to the radiator cap and drain plug, if equipped.
- Locate the radiator cap (on the left radiator) and the coolant drain bolt (typically on the lower right side of the water pump cover).
- Drain the Old Coolant
- Place a drain pan under the drain plug and gently loosen the radiator cap to break system pressure.
- Remove the drain bolt and allow all coolant to flow out into the pan.
- Inspect the old coolant for debris or oil signs of potential engine issues.
- Flush (Optional but Recommended)
- Reinstall the drain plug temporarily and fill the system with distilled water.
- Run the engine for 1–2 minutes to circulate, then repeat the draining process to remove residual old coolant.
- Reassemble and Refill
- Install the drain bolt with a new seal ring for best leak prevention.
- Add fresh coolant (about 1.2 liters), filling until it reaches the bottom of the radiator neck.
- Replace and seat the radiator cap.
- Top off the overflow reservoir to the appropriate mark.
- Bleed Air from the System
- Start the engine and let it idle with the radiator cap on, allowing the bike to heat up and air bubbles to release through the overflow tank.
- When cool, recheck both the radiator and the reservoir; top off if needed.
Model-Specific Notes for the 2021 Husqvarna FE501HQ
- Aluminum radiators on the FE501HQ are lightweight but can be easily damaged always use care when removing plastics or working around them.
- This bike has a large-capacity cooling system (approx. 1.2L) for a four-stroke engine with high power output, making regular flushes important under aggressive use.
- If your FE501HQ is equipped with a radiator fan, confirm it cycles during the bleed processa key step in ensuring no air pockets remain in the system.
- Inspect all hose clamps and connection points during service, as rugged trail riding can loosen or damage them over time.
- Always dispose of used coolant responsiblynever pour it on the ground or in storm drains.
Pro Tips
- Never mix different coolant types; always flush thoroughly if switching brands or specifications.
- If riding in extreme temperatures or racing, consider high-performance, motorcycle-specific coolant blends for added thermal protection.
- Check coolant levels regularly, especially after the first couple of rides following a change, as air pockets may purge out.
Taking the time to change your FE501HQ's coolant as described above will keep you riding longer and harderno matter what the trail throws at you.
Related Shopping Categories
Shop Radiators for a 2021 Husqvarna FE501HQ Dirt Bike.
Shop Coolant for a 2021 Husqvarna FE501HQ Dirt Bike.
Shop Temperature Sensors for a 2021 Husqvarna FE501HQ Dirt Bike.
Shop Tools for a 2021 Husqvarna FE501HQ Dirt Bike.
Shop Radiator Hoses for a 2021 Husqvarna FE501HQ 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.