How to Change the Coolant in a 2014 GAS GAS TXT PRO 125
Regular coolant maintenance is crucial for the performance and longevity of your 2014 GAS GAS TXT PRO 125. Below, you'll find a proprietary, step-by-step MotoSport guide tailored specifically to your model, including tips owners should know to protect their investment and maximize reliability.
Why Change the Coolant?
The 2014 TXT PRO 125 relies on its coolant system to regulate engine temperature under extreme trial conditions. Old or degraded coolant can cause overheating, corrosion, and premature engine wear. It is recommended to change the coolant every 1–2 years or after particularly hard use.
Recommended Tools & Supplies
- Fresh coolant (silicate-free motorcycle coolant is recommended for trial bikes)
- Basic hand tools (screwdrivers, pliers, socket set)
- Drain pan
- Funnel
- Shop towels
- Protective gloves & eyewear
Step 1: Bike Preparation
- Make sure the engine is completely cool before starting to avoid burns.
- Place the bike on a stable stand and remove the skid plate if equipped.
Step 2: Access the Radiator System
- Remove the fuel tank and shrouds to access the radiator cap and hoses. On the TXT PRO 125, the radiator cap is generally located under the tank.
Step 3: Draining the Old Coolant
- Position a drain pan beneath the lowest coolant hose – usually at the water pump or bottom of the radiator.
- Loosen the hose clamp and carefully detach the hose to allow coolant to drain completely.
Some bikes have a dedicated drain bolt in the water pump area—if present, remove this bolt to fully empty the system. - Open the radiator cap to allow air in, which will speed up draining.
Step 4: System Inspection
- Check hoses and clamps for wear or cracks. Replace if necessary.
- Inspect the drained coolant for oil contamination or unusual debris, which could indicate internal gasket issues.
Step 5: Flushing the System (Optional but Recommended)
- With the hoses still off, pour a small amount of distilled water through the radiator to flush out any remaining old coolant or debris.
- Allow the water to drain completely.
Step 6: Refilling with Fresh Coolant
- Reattach and securely tighten any hoses or drain bolts removed earlier.
- Using a funnel, slowly fill the radiator with new coolant to the base of the filler neck. Filling slowly reduces the chance of trapping air bubbles.
- On the TXT PRO 125, keep an eye out for any overflow as you approach full capacity.
Step 7: Bleeding the Cooling System
- Start the engine and let it idle with the radiator cap off (if safe). Watch for air bubbles escaping as the thermostat cycles open.
- After a few minutes, top off with coolant as needed.
- Replace the radiator cap and allow the engine to reach operating temperature, then shut it off and let it cool completely.
- Check the coolant level again when fully cooled and top off if necessary. This ensures any residual air is removed and the system is properly filled.
Step 8: Reassembly
- Reinstall the fuel tank, shrouds, and skid plate.
- Double-check for any leaks or drips at all hose and cap connections.
GAS GAS TXT PRO 125 Owner Tips
- This model uses a compact, weight-saving radiator design sensitive to air pockets — careful bleeding is essential for temperature control.
- Inspect the water pump for signs of leakage or play; the TXT PRO 125 is known for reliable but high-revving use that can accelerate seal wear.
- Always use a high-quality, premixed coolant specifically formulated for aluminum engines to prevent corrosion and maximize heat transfer.
- Record the date and hours since the coolant change in your log, as maintenance intervals are crucial for trial bikes that see frequent clutch use and tight technical riding.
Following this MotoSport coolant change procedure will help keep your 2014 GAS GAS TXT PRO 125 running cool and reliable through every trial. For replacement coolant, hoses, or specialty tools, remember to shop parts for your ride now!
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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.