How to Change the Coolant in a 2014 GAS GAS TXT PRO 300
Properly changing the coolant in your 2014 GAS GAS TXT PRO 300 is essential for maintaining optimal engine temperature and ensuring long-term durability, especially given the demands of trials riding. While the TXT PRO 300 uses a robust liquid cooling system, neglecting coolant maintenance can lead to engine overheating or premature wear. Follow this detailed guide designed specifically for TXT PRO 300 owners.
Preparation – Safety First
- Let the engine cool completely before removing the radiator cap or draining coolant. Hot coolant is under pressure and can cause severe burns if released suddenly.
Always wait at least 30 minutes after running the bike.* - Gather all required tools: socket set, flat screwdriver, pliers, drain pan, funnel, and approved coolant compatible with aluminum engines.
- Work in a well-ventilated, flat area with plenty of space for spill containment.
Draining the Old Coolant
- Locate the radiator cap on the right side of the frame, near the upper triple clamp.
- Locate the coolant drain bolt or remove the lower hose at the water pump (as service manuals indicate). Place a drain pan directly beneath this area to catch old coolant.*
- Slowly loosen the radiator cap (but do not remove it yet); this prevents splashing if any pressure remains. Once pressure is gone, fully remove the cap.
- Loosen and remove the drain bolt or detach the hose. Allow all coolant to drain fully. Tilt the bike gently side to side to ensure maximum drainage from both sides of the radiator.*
- Inspect the old coolant for debris, oil, or unusual color, which may indicate internal issues.
Flushing (Recommended)
- If the coolant appears dirty or contaminated, flush the system: fill the radiator with distilled water, reinstall cap and drain bolt/hose, run engine for 2–3 minutes, then drain again.
- Repeat if necessary until water runs clear.
Refilling with New Coolant
- Confirm drain bolt/hose is reattached and tightened securely.
- Using a funnel, pour fresh, pre-mixed coolant into the radiator until it reaches just below the filler neck. Use only coolant designed for aluminum components to avoid corrosion.
- Briefly gently rock the bike side to side – this helps dislodge trapped air in the system.
- Reinstall and tighten the radiator cap securely.
Final Steps – Air Bleed and Inspection
- Start the engine and let it idle for 2-3 minutes. Watch for bubbles at the overflow tube and listen for abnormal sounds.
- Shut the engine off, allow to cool, and recheck coolant level. Top off as needed.*
- Inspect for leaks at the drain bolt/hose and radiator connections. Wipe away any residue.
Special Considerations for the TXT PRO 300
- The 2014 GAS GAS TXT PRO 300 uses a compact and efficient cooling system. Always monitor coolant level during extreme or technical riding – overheating can occur with insufficient coolant.
- This model's radiators and hoses are tightly packed; use patience when loosening hoses to prevent accidental damage to fragile fins or connections.
- Don't mix different coolant types (e.g. ethylene glycol and propylene glycol), as this may cause gel formation or corrosion over time.
- Always replace lost coolant immediately after pressure washing or deep water crossings.
Disposal & Environmental Note
- Old coolant is toxic – collect and dispose at a designated recycling center. Never pour coolant on the ground or down a drain.
Keeping your 2014 GAS GAS TXT PRO 300's cooling system in top shape helps ensure competition-winning performance, reliable starts, and worry-free rides on the most technical sections. If you notice rapid coolant loss or persistent overheating, inspect radiators and hoses for leaks and replace any faulty parts with OEM-quality components available through MotoSport.
*These are critical safety precautions, especially due to the compact radiator and high-temperature operation common to this model.
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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.