How to Change the Coolant in a 2017 GAS GAS TXT PRO RACING 125: MotoSport Guide
Maintaining the cooling system of your 2017 GAS GAS TXT PRO RACING 125 is essential for optimal engine performance and longevity, especially since it is a liquid-cooled 125cc two-stroke bike. Follow this proprietary step-by-step guide created by MotoSport to ensure a safe and thorough coolant change tailored to your specific MMY dirt bike.
What Makes the TXT PRO RACING 125 Unique?
This model uses a liquid cooling system critical for preventing overheating in varied trials conditions. Synthetic or semi-synthetic two-stroke oil at 1.5% (about 67:1 ratio) is recommended, and special attention should be paid to all regular maintenance to assure reliable operation.
Important: Never attempt to remove the radiator cap or drain coolant when the engine is hot–always let it cool completely to avoid burns and accidental pressure release.
Tools & Supplies Needed
- Fresh, motorcycle-specific coolant (preferably premixed or distilled water & concentrate as specified by the manufacturer)
- Drain pan
- Socket set or wrench (to remove drain bolt)
- Phillips screwdriver (for radiator shroud removal if needed)
- Rags for spill cleanup
- Funnel
- Safety gloves
Step-by-Step Coolant Change Guide
- Let the Engine Cool: Ensure your bike is completely cool before starting. The 2017 TXT PRO RACING 125's pressurized system can cause severe burns if opened while hot.
- Remove Bodywork for Access (if needed): Use appropriate tools to remove the radiator shrouds or side plates. This provides better access to the radiator and drain plug.
- Drain the Old Coolant: Place a drain pan under the water pump or the lower radiator hose. Locate the coolant drain bolt (typically found at the water pump cover) and loosen it. Remove the radiator cap to quicken draining. Allow all coolant to flow out.
- Inspect and Clean: Wipe away any residue around the fill and drain areas. Check hoses and clamps for cracks or wear–replace if necessary.
- Reinstall the Drain Bolt: Once drained, replace the sealing washer if equipped, and tighten the drain bolt to manufacturer torque spec.
- Add Fresh Coolant: Using a funnel, pour new coolant into the radiator until it reaches the top of the filler neck. Premixed coolant is ideal, but if mixing yourself, always use distilled water to avoid mineral build-up in the system.
- Burp the Cooling System: Start the engine with the radiator cap off and run for several minutes. Lightly blip the throttle and gently rock the bike to help air bubbles escape. This prevents hot spots from trapped air. Top off coolant as needed while running.
- Final Fill & Secure: Once bubbling stops and coolant level stabilizes, shut off the engine. Top up if necessary and reinstall the radiator cap.
- Dispose of Old Coolant Responsibly: Take used coolant to an approved recycling center–never pour down drains or onto the ground.
- Reinstall Shrouds/Bodywork: Refit any panels removed earlier.
Expert Tips for the GAS GAS TXT PRO RACING 125
- Check the radiator for damage or mud build-up–clean fins with low pressure air as needed for peak cooling.
- Monitor the coolant level between rides, especially after a refill, to catch leaks early.
- Follow the GAS GAS recommendation of an eight-hour engine break-in period and always use correct oil ratios for proper lubrication and cooling synergy.
Maintenance Frequency
Regularly inspect your coolant level and quality as part of your pre-ride check. Replace coolant every 1-2 years or more often if operating in harsh conditions or if you notice degradation in color or performance.
Your 2017 GAS GAS TXT PRO RACING 125 is engineered for precise, controlled riding–keeping the cooling system perfect ensures your bike stays as sharp as your skills. For high-performance parts, complete maintenance kits, and more, trust MotoSport to support every aspect of your ride.
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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.