How to Change the Coolant in a 2010 GAS GAS TXT PRO 125
Shop parts for your ride now!Maintaining the correct coolant level is essential for the longevity and performance of your 2010 GAS GAS TXT PRO 125. Routine coolant changes prevent corrosion, improve heat transfer, and help your engine perform in all conditions. This guide outlines the coolant replacement process, tailored specifically to the unique requirements of your trials bike, and shares tips that every TXT PRO 125 owner should know.
What You Need to Know About the 2010 GAS GAS TXT PRO 125 Cooling System
- The TXT PRO 125 features a lightweight aluminum engine, requiring non-silicate, lightweight alloy-safe coolant.
- The radiator cap is positioned under the fuel tank, making tank removal necessary for access.
- Never attempt to open the radiator when the engine is hot–risk of severe scalding.
Tools & Supplies Needed
- 3mm, 4mm, and 6mm Allen wrenches
- Socket set
- Drain pan
- Rags
- New coolant (aluminum-safe, pre-mixed or mixed 50/50 with distilled water)
- Protective gloves and eyewear
Step-by-Step: Coolant Replacement
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Let the engine cool completely.
Hot coolant can cause serious injury. Allow the bike to sit until cool to the touch–never rush this step. -
Remove the seat and fuel tank.
Open the seat fasteners with the appropriate Allen wrench.
Shut off the fuel tap and disconnect the fuel line. Unscrew the mounting bolts, then lift the tank from the chassis to expose the radiator cap underneath. -
Locate and remove the radiator cap.
With the tank out of the way, the radiator cap is directly accessible. -
Place a drain pan under the water pump area.
The drain plug is at the lowest point on the right side of the engine–usually on the water pump cover. -
Remove the coolant drain bolt.
Use the correct socket to slowly loosen and remove the drain bolt. Allow coolant to fully evacuate into your drain pan. -
Flush if necessary.
If your coolant appears very dirty, briefly pour distilled water into the radiator and allow it to flush through and drain completely. -
Replace and tighten the drain bolt.
Torque the bolt to snug–do not overtighten. -
Fill with fresh coolant.
Using a funnel, slowly pour coolant into the radiator opening until full. Gently rock the bike from side to side to encourage air bubbles to escape. - Reinstall the radiator cap, fuel tank, and seat.
-
Run the engine and check the level.
Start the bike and let it run for a few minutes.
Turn off, let cool, check coolant level, and top up if necessary.
Pro Tips for TXT PRO 125 Owners
- Always verify you use coolant suitable for aluminum engines to prevent internal corrosion.
- The compact trials chassis makes radiator cap and hose access tight–removing the tank is recommended for full access.
- Periodic coolant replacement (at least once every two years) helps ensure reliable performance in demanding slow-speed sections where heat builds up.
Signs of Cooling System Issues
- Overheating or loss of coolant without visible leaks
- Discolored or oily coolant (indicates possible head gasket leak)
- Leaks at hose connections or around the water pump
Performing your own maintenance fosters a stronger connection with your TXT PRO 125 and ensures it's ready for trials challenges. For all parts, gaskets, or specialty coolant, MotoSport.com stocks everything you need to keep your ride in top shape.
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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.