How to Change the Coolant in a 2010 Husaberg FE390: Step-by-Step Guide
Shop parts for a 2010 Husaberg FE390 Dirt Bike.
Keeping your 2010 Husaberg FE390 performing at its best means regular maintenance, and one of the most important tasks is changing the coolant. This process not only protects the engine from overheating but also helps prevent internal corrosion and ensures a long lifespan for critical components. Follow this MotoSport proprietary guide for a comprehensive, confident coolant change suited specifically for the unique FE390.
What Makes the 2010 Husaberg FE390 Cooling System Unique?
The 2010 FE390 features Husaberg's cutting-edge 70-degree single-cylinder engine, which places unique stress on the cooling system due to its compact layout and high-performance demands. The radiators are tucked close to the chassis, ensuring efficiency but requiring special care during maintenance and coolant bleeding to prevent air pockets that can lead to overheating. Regular inspection for weep holes and water pump seal integrity is also especially wise, as these are known wear points on Husaberg's design.
Tools & Supplies Needed
- Fresh pre-mixed 50/50 motorcycle coolant (silicate-free, compatible with aluminum engines)
- Basic socket and screwdriver set
- Clean rags and a small catch pan
- Distilled water for flushing
- Funnel
- Gloves and safety glasses
Step 1: Let the Engine Cool Down
Never attempt to open the radiator cap on a hot engine. Allow the bike to cool completely before proceeding.
Step 2: Remove Shrouds and Tank for Access
Unscrew and remove the left and right radiator shrouds. Depending on your reach and preferred working angle, you may also want to remove the fuel tank for easier access to both radiators and the filler neck on the left-hand side.
Step 3: Drain the Old Coolant
- Locate the coolant drain bolt – usually found at the lowest point on the right side of the water pump cover.
- Position your pan underneath, then slowly loosen and remove the bolt. Allow the coolant to drain completely.
- Remove the radiator cap to ensure the system vents freely and drains fully.
- Inspect the drained coolant for debris or oil sheen. Discoloration may point to a failing water pump seal.
Step 4: Optional – Flush the System
If the old coolant appears dirty, refill the system with distilled water, reinstall the drain bolt and radiator cap, run the engine for a few minutes, then repeat the draining process. Do not use tap water, which can leave scale in the radiators.
Step 5: Reinstall Drain Bolt & Add New Coolant
- Make sure the drain bolt and its washer are clean before reinstalling & torquing to factory specification.
- With a funnel, slowly pour in new coolant until the level sits just above the radiator cores, as visible through the fill neck.
Step 6: Bleed Air from the System
On the FE390, elevate the front wheel if possible and gently rock the bike to help trapped air find its way out. Squeeze radiator hoses with your hand to purge bubbles, then briefly start the engine with the cap off and observe the coolant level – topping up as necessary. Replace the radiator cap when finished.
Step 7: Reassemble and Inspect
- Reinstall the fuel tank and radiator shrouds securely.
- Wipe away spilled coolant and check for leaks at drain, hose clamps, and the water pump area.
- Warm the bike fully on its stand. After it cools, recheck the coolant level – add more coolant if needed up to 10 mm above the radiator fin tops.
Important Model-Specific Notes
- The FE390's water pump shaft uses two seals (one for coolant, one for oil). If you notice milky coolant or unexplained coolant loss, proactively inspect both seals – a common wear issue for this engine configuration.
- Always use a compatible silicate-free coolant; the unique alloy blend in Husaberg's radiators and engine can corrode if the wrong product is used.
- Frequent, high-RPM riding in dusty or muddy conditions increases thermal stress – consider more frequent coolant changes on this dirt bike compared to street-legal motorcycles.
Maintaining fresh coolant in your 2010 Husaberg FE390 not only protects your engine but helps you stay on the trail longer with peace of mind. Keep your maintenance up-to-date – and if you need anything from radiator caps to water pump rebuild kits, Shop parts for a 2010 Husaberg FE390 Dirt Bike.
Related Shopping Categories
Shop Radiators for a 2010 Husaberg FE390 Dirt Bike.
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Shop Temperature Sensors for a 2010 Husaberg FE390 Dirt Bike.
Shop Tools for a 2010 Husaberg FE390 Dirt Bike.
Shop Radiator Hoses for a 2010 Husaberg FE390 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.
