How to Change the Coolant in a 2002 Husaberg FE400: MotoSport Proprietary Guide

Shop parts for a 2002 Husaberg FE400 Dirt Bike.

Changing coolant on your 2002 Husaberg FE400 is a vital service for maintaining engine temperature and preventing corrosion. The FE400's high-performance engine demands regular coolant changes to protect the magnesium and aluminum components, especially after aggressive riding or operation in extreme heat. Use only high-grade motorcycle-specific coolant (never tap water, which causes corrosion) and never substitute with pure water—always ensure a mix with anti-freeze protection to at least –25°C (–13°F).

What Makes the 2002 Husaberg FE400 Unique?

  • Magnesium engine cases and a high-output water pump require excellent cooling system maintenance.
  • Radiators sit high and are exposed; always check for bent fins or leaks after a crash.
  • The coolant should rest 10 mm above the radiator fins when cold–any less may indicate leaks or air in the system.
  • Extreme conditions and stop-and-go use can cause rapid overheating. Watch for steam or frequent reservoir level drops—these may mean you need to bleed the system or check components.

Tools & Supplies Needed

  • High-quality, motorcycle-approved coolant (avoid automotive coolant)
  • Distilled water (if mixing)
  • Drain pan
  • Socket set and screwdrivers
  • Clean rags
  • Rubber gloves & eye protection

Step-by-Step: Coolant Change Procedure

  1. Remove side panels to access your radiator cap and drain bolts.
  2. Open the radiator cap (engine must be cool) to prevent scalding. Open reservoir cap if fitted.
  3. Place drain pan under the water pump or lowest hose fitting. Loosen and remove the drain bolt or bottom hose. Allow old coolant to fully drain.
  4. If switching coolant type, remove hoses and use compressed air to flush remaining fluid–repeat for opposite side. Check for debris or blockages.
  5. Inspect hoses and clamps. Replace if cracked, swollen, or loose. Reinstall drain bolt/hose with new sealing washer if needed.
  6. Fill radiator slowly using recommended coolant or 50/50 pre-mix. Fill up to the base of the filler neck.
  7. Bleed/"Burp" the system: With the cap off, start the bike and let it idle. Gently rock the bike side to side, blip the throttle–this helps purge trapped air. Watch for the coolant level dropping as air escapes. Top off as needed.
  8. Check for leaks around hoses, joints, and drain bolts.
  9. Reinstall radiator cap before the coolant overflows. Let the engine reach operating temperature–the thermostat will open, circulating coolant.
  10. Shut off the bike and allow it to cool completely to ambient temperature. Check reservoir and radiator; coolant should be 10 mm above fins.
  11. Top off as necessary. If the level keeps dropping repeatedly, further bleeding or a leak may be present.

Important Notes for FE400 Owners

  • Always use high-grade anti-freeze/coolant for optimal magnesium and aluminum protection.
  • Avoid overfilling separator tanks; excess may spill as the system expands—monitor reservoir level after your first rides.
  • The FE400 cooling system is highly sensitive. If you notice overheating, regularly inspect radiator cap seals and water pump function.

Disposal & Final Inspection

  • Dispose of old coolant responsibly–never pour down drains or onto soil.
  • Check coolant color every few weeks. Milky or rusty coolant signals contamination—flush the system.

Routine coolant changes keep your 2002 Husaberg FE400 running cool, safe, and powerful on every ride. If you need OEM or aftermarket parts, Shop parts for a 2002 Husaberg FE400 Dirt Bike.

Related Shopping Categories

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Shop Radiator Hoses for a 2002 Husaberg FE400 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.