How to Change the Coolant in a 2025 Beta 390 RR X-PRO

Shop parts for a 2025 Beta 390 RR X-PRO Dirt Bike.

The 2025 Beta 390 RR X-PRO introduces significant updates over previous generations, including a new frame design, a 20mm lower seat height, and a dedicated coolant overflow reservoir for enhanced trail durability.–1–3 Keeping your cooling system working at its best is essential for engine longevity and performance. Follow this MotoSport-exclusive step-by-step guide to safely change the coolant and ensure your X-PRO is ready for the toughest rides.

Items You'll Need

  • Fresh engine coolant compatible with aluminum motorcycle radiators (ready to use, not concentrated)
  • Basic hand tools (screwdrivers, socket set, pliers)
  • Drain pan for old coolant
  • Rags or shop towels
  • Protective gloves and eyewear

Step-by-Step Coolant Change Procedure

  1. Allow the Engine to Cool:
    Never service the coolant when the bike is hot. Ensure the 390 RR X-PRO engine is completely cool–this avoids injury and inaccurate coolant level checks.
  2. Remove Front Plastics – If Necessary:
    Depending on the version and accessories, you may need to remove a side radiator shroud or plastic panel to access the radiator cap.
  3. Open the Radiator Cap:
    Slowly twist off the radiator cap. Do this carefully, even when cool, to avoid pressure spray.
  4. Drain the Old Coolant:
    Locate the coolant drain bolt–typically found at the lower edge of the water pump cover. Position a drain pan underneath.
    Loosen and remove the bolt, allowing coolant to fully drain. Remove the radiator cap if not done already for better flow.
    Inspect the old coolant for discoloration, debris, or oil contamination (which can indicate deeper issues).
  5. Flush if Needed:
    Fill the system with distilled water and let it drain completely for a simple flush, especially if the coolant appeared dirty. Do this step before adding new coolant.
  6. Reinstall the Drain Bolt:
    Replace the drain bolt and tighten to manufacturer-recommended torque. Check the included manual or MotoSport's technical resources for precise values.
  7. Refill with New Coolant:
    Slowly pour new coolant into the radiator until it nearly reaches the top. Fill the auxiliary coolant overflow reservoir to the marked level for proper system functioning. Overfilling can cause unwanted spillage; stick to marked lines.
  8. Bleed Air from the System:
    With the radiator cap off, briefly start the engine and let it idle. Add coolant as needed while air bubbles escape. Stop the engine as soon as coolant stays steady at the top.
  9. Reinstall Radiator Cap & Panels:
    Replace the cap securely and refit any removed plastics.
  10. Warm Up & Check Levels:
    Start and run your engine gently until it reaches full operating temperature. Shut off, let the machine cool, and double-check the coolant level in both radiator and overflow reservoir. Top off as required.

What Makes the 2025 Beta 390 RR X-PRO Unique?

  • The coolant overflow reservoir is a robust addition for aggressive off-road use, protecting against overheating and coolant loss on technical trails.–1–3
  • The redesigned frame and lower seat height enhance handling and access to the cooling system compared to previous models.–1–3
  • This model's cooling system is engineered for vigorous, multi-discipline trail environments. Regular checks are strongly recommended if riding in high-heat conditions or challenging terrain.

Tips for 390 RR X-PRO Owners

  • Always use coolant rated for aluminum engines–never plain water for extended service.
  • Inspect hoses and clamps for leaks or cracks during coolant service. Replace as needed for reliable performance.
  • Wipe down any coolant spills immediately. Antifreeze is slippery and hazardous to bikes, pets, and the environment.

With proper coolant care, your 2025 Beta 390 RR X-PRO will deliver top performance wherever the trail leads.

Related Shopping Categories

Shop Radiators for a 2025 Beta 390 RR X-PRO Dirt Bike.

Shop Coolant for a 2025 Beta 390 RR X-PRO Dirt Bike.

Shop Temperature Sensors for a 2025 Beta 390 RR X-PRO Dirt Bike.

Shop Tools for a 2025 Beta 390 RR X-PRO Dirt Bike.

Shop Radiator Hoses for a 2025 Beta 390 RR X-PRO 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.