How to Change the Coolant in a 2012 GAS GAS TXT PRO 280

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Routine coolant replacement is essential for the long-term health and performance of your 2012 GAS GAS TXT PRO 280. This model uses a liquid-cooled system that requires periodic draining, flushing, and refilling to maintain optimal engine temperature and prevent corrosion or overheating. Below, you'll find a comprehensive MotoSport-exclusive guide for changing the coolant on your TXT PRO 280.

What You Need

  • Fresh 50/50 mix of quality motorcycle coolant or premixed coolant suitable for aluminum engines
  • Phillips and flathead screwdrivers
  • Sockets and ratchet (8 mm and/or 10 mm)
  • Pliers
  • Drain pan
  • Shop towels
  • Safety gloves

Important Model-Specific Notes

  • Ensure the engine is completely cool before removing the radiator cap to avoid burns as the system is pressurized when hot and can cause severe scalding–a detail highlighted by GAS GAS manuals.
  • The radiator cap is located under the fuel tank, which may require removal or raising for easy access.

Step-by-Step Coolant Change Procedure

  1. Access the Radiator:
    • Ensure your bike is on a stable stand.
    • Allow the engine to cool down completely.
    • If needed, remove or lift the fuel tank to access the radiator cap under the tank.
  2. Drain the Old Coolant:
    • Place a drain pan under the lowest hose connection or water drain bolt–typically at the water pump housing or bottom radiator hose–to capture the coolant.
    • Loosen the hose clamp or drain bolt and remove the hose/bolt to let the coolant fully drain into the pan.
    • If your model has a specific drain bolt, use a socket to remove it.
  3. Flush the Cooling System (Recommended):
    • Optional: Pour distilled water through the radiator inlet to flush out any remaining old coolant and contaminants, then drain completely again.
  4. Reinstall Drain Components:
    • Re-attach the bottom hose or reinstall the drain bolt. Tighten clamps and bolts securely, but do not overtighten.
  5. Refill with New Coolant:
    • Slowly pour new 50/50 mixed coolant into the radiator until full. Fill slowly to allow air to escape and prevent airlocks.
    • Some models benefit from slightly tilting the bike side-to-side during fill to help disperse trapped air.
    • Fill up to the base of the filler neck unless otherwise specified.
  6. Bleed the Cooling System:
    • With the radiator cap still off, briefly start the engine and let it idle, watching for air bubbles escaping as the thermostat begins to open (typically after 2-3 minutes of idling).
    • Keep an eye on the coolant level and top up as needed.
    • Once bubbling stops and the coolant level stabilizes, reinstall the radiator cap securely.
  7. Check for Leaks & Reinstall Bodywork:
    • Check all hoses, clamps, and the drain area for leaks.
    • Reinstall the fuel tank and any bodywork removed for the job.
  8. Test Ride & Final Check:
    • Start the engine and let it reach normal operating temperature.
    • If the temperature climbs abnormally or fluctuates, air may still be in the system. Allow it to cool and repeat the bleeding step if needed.
    • Double-check coolant level and top off as necessary after the first ride.

Additional Tips for GAS GAS TXT PRO 280 Owners

  • This engine is sensitive to overheating from low coolant levels or airlocks. Carefully follow fill and bleed procedures and always monitor the coolant level periodically.
  • Use only high-quality, non-silicate motorcycle coolant compatible with aluminum components.
  • Check that fan wiring and radiator fins are clean and unobstructed for optimal cooling performance.

Keep your 2012 GAS GAS TXT PRO 280 running strong with simple regular maintenance. For OEM and aftermarket cooling system parts, gaskets, and tools, MotoSport has you covered!

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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.