How to Change the Coolant in a 2000 Husaberg FE400: MotoSport Guide

Shop parts for a 2000 Husaberg FE400 Dirt Bike.

Regularly changing the coolant in your 2000 Husaberg FE400 is key to preserving engine performance and preventing overheating especially for a bike engineered for competition use. The FE400 features a high compression ratio and an efficient cooling system, making coolant maintenance even more critical for longevity and reliability.

What You'll Need

  • Fresh, high-quality motorcycle coolant (ethylene glycol based, silicate free; never mix coolants with unknown composition)
  • Drain pan
  • Clean funnel
  • Phillips and flathead screwdrivers
  • Socket set
  • Protective gloves
  • Shop towels or rags

Preparation

  • Ensure the engine is completely cool before starting.
  • Elevate the bike on a stable stand for access to the radiator and drain plugs.
  • Remove bodywork surrounding the radiator as needed for better access.

Draining Old Coolant

  • Locate the radiator cap on top of the left radiator. Carefully twist and remove it to release any residual pressure.
  • Find the coolant drain bolt usually located at the lowest point of the water pump or engine case.
  • Place the drain pan underneath, then remove the drain bolt and allow coolant to flow completely.
  • Inspect the old coolant: dark, sludgy, or rust-colored coolant indicates overdue maintenance.
  • If equipped, remove or disconnect the coolant overflow tank, empty it, and rinse thoroughly if there is any debris or staining.

Inspect System Components

  • Squeeze the radiator hoses to check for brittleness or cracks; replace if any sign of aging appears.
  • Inspect the radiator for bent fins or leaks – use a gentle tool to straighten cooling fins if needed.
  • Examine and tighten all hose clamps.

Flushing (Optional for Thorough Maintenance)

  • For tough coolant residue, refill the system temporarily with distilled water, run the engine briefly (no extended idling), then drain again.
  • Repeat until the draining liquid is clear; this step is essential if you're switching coolant types.

Refilling with Fresh Coolant

  • Reinstall and torque the drain bolt securely.
  • Using a clean funnel, slowly pour new coolant into the radiator until filled to the base of the filler neck.
  • Fill the overflow reservoir to the correct mark, if equipped.

Bleeding Air from the System

  • With the radiator cap off, tilt the bike gently side-to-side to help trapped air escape.
  • Some FE400s are equipped with a small bleed screw at the cylinder head. Open this slightly until coolant (not air) flows out, then close securely.
  • Top off the radiator as needed during bleeding.

Final Steps

  • Start the engine and idle until warm. Watch the coolant level — when the thermostat opens, coolant may drop as air escapes the system.
  • Add coolant as needed, then reinstall the radiator cap before coolant begins to overflow.
  • Let the bike cool fully, then recheck and top off both radiator and overflow reservoir if needed.

What FE400 Owners Should Know

  • The 2000 Husaberg FE400 is crafted for aggressive off-road use. A clean, sealed cooling system is vital to prevent detonation or overheating, especially considering the high compression ratio.
  • Always use premium coolant and distilled water if diluting, as minerals in tap water can corrode the cooling system over time.
  • Check the coolant and inspect for leaks or evaporation monthly, especially after aggressive rides or races.
  • If your FE400 boils over, bleed the cooling system once cool – air pockets are common and can cause rapid overheating if not removed.
  • Never forget to properly torque bolts for the drain and bleed fittings, and use new washers if necessary to prevent leaks.

Following these steps ensures your 2000 Husaberg FE400 stays cool and reliable on every ride. Preventative maintenance protects your investment and keeps you focused on the trails – not the temperature gauge.

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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.