How to Change the Coolant in a 2011 Husaberg FE390
Shop parts for a 2011 Husaberg FE390 Dirt Bike.
Performing a coolant change on your 2011 Husaberg FE390 helps deliver peak radiator performance – especially important for the 70-degree engine design, which puts unique thermal demands on the cooling system. Follow this step-by-step MotoSport guide for a robust and model-specific process.
Tools & Materials Needed
- Socket set and wrenches
- Pliers
- Drain pan
- Funnel
- Fresh coolant (aluminum-friendly, silicate-free)
- Distilled water (if flushing system)
- Clean rags or shop towels
- Safety gloves and eye protection
Preparation – Accessing the Cooling System
- Park the bike upright on a level surface and let the engine cool completely before starting.
- Remove the seat by pulling the release loop located under the rear fender.
- Remove the fuel tank. Begin by disconnecting the fuel line and loosening the mounting bolts, then gently lift the tank free, ensuring all connected lines are safely detached.
- You now have clear access to the top of the radiators and hoses.
Draining the Old Coolant
- Locate the lower radiator hose or the drain bolt at the lowest point of the water pump housing (right side of the engine). Place your drain pan beneath this area.
- Loosen the radiator cap at the top of the left radiator, but do not fully remove it until you begin draining to prevent sudden spillage.
- Remove the drain bolt or loosen the lower radiator hose to let the old coolant drain out completely. Allow several minutes for a thorough drain – tipping the bike gently side-to-side can help evacuate as much fluid as possible.
- Inspect the old coolant. If you see oily residue or significant sediment, you may want to flush the system using distilled water.
Cooling System Flush (Optional but Recommended)
- Reinstall the drain bolt or hose, fill the radiator with distilled water, run the engine briefly (30–60 seconds), then re-drain the system to remove any residues.
- Repeat until fluid comes out clean, then let the system dry for a few minutes before refilling.
Refilling with New Coolant
- Replace and torque the drain bolt or hose clamp to factory specification.
- With a funnel, slowly fill the radiator with the recommended type and amount of coolant until it reaches the base of the filler neck. On the FE390, the correct level is just above the radiator fins (around 10 mm or 0.39 in above).
- Leave the radiator cap off for now.
Air Bleed – Preventing Hot Spots
- Start the engine and let it idle for a few minutes. Squeeze the upper radiator hose gently to help purge trapped air bubbles.
- Monitor the coolant level; as air escapes, top off as necessary.
- Once air bubbles stop appearing and the coolant level stabilizes, reinstall the radiator cap securely.
Coolant Reservoir Check
- The FE390 has a small expansion/reservoir tank; check its level after your first ride and after full cooling cycles. Top up if needed to maintain optimal function of the closed system.
Final Steps – Reassembly & System Checks
- Reinstall the fuel tank and reconnect all hoses and connectors. Secure the mounting bolts.
- Refit the seat, ensuring the latch clicks into place.
- Start and run your bike until fully warmed. Shut off, let cool to ambient, then recheck the radiator and reservoir levels, topping off if necessary.
2011 Husaberg FE390 – Model-Specific Tips
- The unique engine tilt and compact design means air can get trapped easily; bleeding is especially important after any service on the FE390.
- Monitor the water pump seals for leaks. This year/model is known for having a weep hole between the oil and coolant seals—minor drips are a warning sign those seals might be due for replacement.
- Always use a high-quality, aluminum-safe coolant to prevent corrosion common in these European engine systems.
Routine coolant changes on your 2011 Husaberg FE390 maximizes performance, keeps operating temperatures safe, and safeguards your 70-degree enduro engine. For any replacement radiator parts, hoses, or seal kits, remember to shop parts for a 2011 Husaberg FE390 Dirt Bike.
Related Shopping Categories
Shop Radiators for a 2011 Husaberg FE390 Dirt Bike.
Shop Coolant for a 2011 Husaberg FE390 Dirt Bike.
Shop Temperature Sensors for a 2011 Husaberg FE390 Dirt Bike.
Shop Tools for a 2011 Husaberg FE390 Dirt Bike.
Shop Radiator Hoses for a 2011 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.
