How to Change the Coolant in a 2011 GAS GAS TXT PRO 300
Keeping your 2011 GAS GAS TXT PRO 300 running cool and in top shape means staying on top of regular maintenance – including coolant changes. Here's a proprietary MotoSport guide to refreshing your cooling system, with model-specific tips for TXT PRO 300 owners.
Why Changing Coolant Matters
Fresh coolant preserves your engine, prevents overheating, and protects against corrosion. Swapping out old coolant is especially important on trials bikes like the TXT PRO 300, where slow, technical riding generates less airflow through radiators compared to high-speed machines.
What You'll Need
- Quality motorcycle coolant (pre-mixed or mix with distilled water per manufacturer instructions)
- Phillips and Allen screwdrivers
- Socket wrench set
- Catcher pan for old coolant
- Funnel
- Shop towels/rags
- Safety gloves and glasses
Step-By-Step Coolant Change for the TXT PRO 300
- Let the engine cool. Never remove the radiator cap on a hot engine – severe scalding can result from hot pressurized fluid. Wait until the motor is fully cool.
- Locate the radiator cap and drain bolt. The TXT PRO 300 uses side-mounted radiators. Remove the seat or tank if needed to access the cap.
- Position the bike upright. Place your coolant catch pan under the water pump area, typically on the right side of the engine.
- Open the radiator cap to allow air in. Then locate the coolant drain bolt – usually at the lowest point of the water pump cover. Loosen the bolt and let coolant completely drain into your pan.
- Inspect hoses and connections while draining. Check for signs of wear, cracking, or leaks. Replace any suspect clamps or hoses for maximum reliability and cooling efficiency.
- Flush if needed. If the old coolant is dirty or has debris, refill the system with distilled water, run it briefly, then drain again.
- Reinstall the drain bolt (with a new crush washer if equipped) and torque to spec.
- Pour in fresh coolant using your funnel. Fill slowly to the radiator neck, allowing air to escape. Squeeze hoses by hand to help burp out trapped air bubbles.
- Start the engine with the radiator cap off. Let it idle for a few minutes. Watch for air bubbles escaping and add more coolant if the level drops.
- Check the level and replace the radiator cap. Wipe up any spills and dispose of old coolant responsibly.
TXT PRO 300 Specific Notes
- The 2011 TXT PRO 300 introduced a wider frame and a longer kickstart shaft, which can affect cooling hose routing and access. When working in the area, take extra care not to disturb the kickstart mechanism.
- Always confirm system bleeding – any trapped air can cause overheating. Some owners recommend tilting the bike slightly from side to side during idle to help evacuate air pockets.
- Check for radiator cap weakness; caps lose tension over time and may not hold proper pressure, increasing boil-overs in trials conditions.
- Coolant volume for the TXT PRO 300 is minimal compared to enduro models, so double-check for leaks and keep an eye on coolant level during your first post-change ride.
When to Change Coolant
For best performance, change coolant at least once a year, or more if you ride often or tackle severe conditions. Always use manufacturer-approved, aluminum-safe coolant to avoid damaging vital engine parts.
Final Pro Tips
- Check spark plug and carburetor access during maintenance intervals, as TXT PRO 300 airboxes require partial disassembly for thorough inspections
- Protect skin & eyes from direct contact with coolant and wash spills off painted/plastic surfaces immediately.
- Proper disposal of used coolant protects local waterways – never pour down drains or on the ground.
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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.