How to Change the Coolant in a 2009 Beta 400 RR

Shop parts for a 2009 Beta 400 RR Dirt Bike.

Changing the coolant in your 2009 Beta 400 RR is essential for maintaining engine performance and preventing overheating. This process is straightforward but requires attention to detail to avoid leaks, airlocks, or accidental burns. Always perform coolant changes in a well-ventilated area with the engine completely cool.

What You Will Need

  • Premium motorcycle coolant (pre-mixed or as specified by Beta)
  • Drain pan
  • 8mm or 10mm wrench (check your drain bolt size)
  • Phillips screwdriver
  • Funnel
  • Shop towels and safety gloves

Step-by-Step Coolant Change: 2009 Beta 400 RR

  1. Prepare the Bike
    Ensure the engine is cold to prevent scalding. Place the bike on a stable stand with easy access to the radiators.
  2. Remove Plastics (If Needed)
    Use your screwdriver to remove any shrouds or plastic guards covering the radiator cap or drain bolt areas for better access.
  3. Remove the Radiator Cap
    Slowly unscrew the radiator cap to release any residual pressure. Never remove the cap while the system is hot–serious burns can result.
    Note: The radiator cap is generally found on the left upper side near the frame.
  4. Drain Old Coolant
    Position your drain pan underneath the water pump or lower radiator hose. Locate and loosen the coolant drain bolt on the water pump cover using your wrench.
    Allow coolant to fully drain. Some models may use the lower radiator hose clamp as the drain point. Confirm by referencing your specific engine case.
    It is recommended to briefly rock the bike gently side-to-side to assist the last of the coolant to exit the system.
  5. Inspect System
    Inspect hoses and fittings for cracks or signs of leaks. Replace damaged parts before reassembly.
  6. Reinstall Drain Bolt
    Clean the drain bolt and washer. Refit and tighten securely, ensuring a fresh sealing washer is used to prevent leaks.
  7. Refill Coolant
    Using a funnel, pour fresh coolant into the radiator until the fluid level is approximately 10 mm (about 3/8 inch) above the radiator fins, per the Beta service manual.
    If your coolant is concentrate, dilute according to the instructions using distilled water–never tap water, to prevent mineral buildup.
  8. Bleed Air from the System
    With the radiator cap still off, start the engine and allow it to idle for several minutes. Gently blip the throttle and rock the bike to free trapped air bubbles. As air purges, the coolant level may drop. Top off as needed until the radiator is full.
  9. Check Reservoir
    Some 400 RR models are equipped with an additional coolant reservoir. Fill this to the "FULL" or upper line.
    Note: If not present, this step can be skipped.
  10. Reinstall Radiator Cap
    Once all bubbles are gone and the system is topped up, reinstall the radiator cap. Make sure it is tightly sealed.
  11. Reinstall Plastics
    Replace any removed radiator shrouds and bodywork securely.
  12. Test and Inspect
    Let the bike heat cycle completely. After cooling back to ambient temperature, check the coolant level again—top up in the radiator and reservoir if necessary. Continue monitoring for leaks after your first ride.

Special Notes for the 2009 Beta 400 RR

  • Coolant Capacity: Check the owner's manual for the correct volume. For similar Beta models, it is typically just over 1 liter.
  • Radiator Fins: Always check that fluid covers the radiator fins by at least 10 mm when cold.
  • Bleeder Screws: This generation did not use bleeder screws, so burping the system as described above is crucial for proper air removal.
  • Coolant Type: Use only coolant compatible with aluminum engines and radiators. Avoid automotive coolants with silicates or phosphates.
  • Change Interval: Beta recommends changing coolant annually, or more frequently if riding aggressively or in harsh conditions.

Safety & Environmental Tips

  • Coolant is toxic–keep away from pets and children.
  • Dispose of used coolant at an appropriate recycling facility.
  • Never dump coolant on the ground, as it is hazardous to the environment.

Related Shopping Categories

Shop Radiators for a 2009 Beta 400 RR Dirt Bike.

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Shop Temperature Sensors for a 2009 Beta 400 RR Dirt Bike.

Shop Tools for a 2009 Beta 400 RR Dirt Bike.

Shop Radiator Hoses for a 2009 Beta 400 RR 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.