How to Change Coolant on a 2015 GAS GAS TXT PRO 300: Step-by-Step Guide
Changing the coolant in your 2015 GAS GAS TXT PRO 300 is essential maintenance for long engine life and consistent performance, especially given the unique lightweight alloy engine design of this model. Owners should follow safety procedures and manufacturer-recommended steps tailored for the TXT PRO 300.
Preparation – Safety First
- Always allow the engine to cool completely before removing the radiator cap. Attempting coolant service with a hot engine can cause severe scalding from pressurized steam or hot fluid. Make sure to work in a well-ventilated area and use gloves to protect your hands.
- If coolant comes into contact with your skin or eyes, flush immediately with water and seek medical attention if necessary.
Step 1: Remove the Fuel Tank
- Remove the upper fuel tank for optimal access to the radiator.
- Ensure the gasoline cap and fuel cock are closed. Detach the fuel tube from the fuel cock.
- Unscrew the Allen screw (M6) securing the front upper tank section. Lift the front, remove the tank, and set aside.
Step 2: Drain Old Coolant
- Locate the coolant drain bolt on the lower engine case or water pump.
- Place a suitable container underneath.
- Remove the radiator cap to allow air in and speed draining.
- Unscrew the drain bolt – allow all coolant to empty completely. Some models use two radiators; ensure both are drained.
Step 3: Flush the Cooling System (Recommended)
- Fill the radiator with distilled water.
- Replace the drain bolt, run the engine briefly (do not let it get hot), then repeat the draining process. This helps remove residues and contaminants.
Step 4: Refill with New Coolant
- Use coolant specifically designed for lightweight alloy motorcycle engines with a minimum freeze protection to -30°C (if riding in cold climates).
- Pour coolant slowly until the radiator is full. Check for any air pockets by gently rocking the bike and allowing bubbles to escape.
- Replace radiator cap securely.
Step 5: Reinstall Fuel Tank
- Place the tank back, align the mounting points, insert and tighten the Allen screw.
- Reconnect the fuel tube securely.
Step 6: Final Safety & Checks
- Start the bike, let it idle, and observe the coolant level through the radiator neck. Add more coolant if needed after engine warms and fluid circulates.
- Visually inspect for leaks around the drain bolt, hose connections, and radiator cap.
- Check spark plug gap (0.6–0.7 mm) and condition during periodic maintenance.
Special Notes for the GAS GAS TXT PRO 300 Owner
- This model's high-performance trials engine uses a compact, lightweight cooling system. Do not substitute with automotive coolants; always select fluids matching manufacturer specs.
- Coolant changes should be part of bi-annual maintenance or after extensive use in muddy, sandy, or demanding environments.
- If you notice overheating or coolant loss between changes, inspect hoses, radiator, and water pump seals promptly.
Performing this service helps preserve your TXT PRO 300's engine & radiator and ensures optimal cooling even under extreme off-road conditions. For all replacement parts and fluids, 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.