How to Change the Coolant in a 2014 GAS GAS TXT Racing 300
If you own a 2014 GAS GAS TXT Racing 300, routine maintenance is essential for peak trials bike performance, and changing the coolant is a key task that prevents overheating and prolongs engine life. The TXT Racing 300’s liquid-cooled single-cylinder two-stroke engine uses a relatively low coolant volume, making proper replacement especially important given its demanding usage in trials riding.
What You’ll Need
- Fresh coolant suitable for aluminum engines (ethylene glycol premix or a dirt bike-specific coolant)
- Drain pan
- Rags or paper towels
- #8 and #10 socket or wrench (confirm bolt sizes on your bike beforehand)
- Phillips or flat-head screwdriver
- Optional: funnel for tidy refilling
Step-by-Step Coolant Change Guide
- Ensure the engine is completely cool before starting. Place the bike on a level stand.
- Remove the radiator cap. Locate it on the left side of the bike, typically above the cylinder head. Open it slowly to release any residual pressure.
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Drain the old coolant. Find the water pump cover on the right side of the engine’s lower crankcase, where you should see a small bolt or plug–this is often the coolant drain bolt.
- Place your drain pan beneath and open the bolt. Allow all coolant to fully drain. Gently tilt the bike side to side to empty remaining fluid if needed.
- (Pro tip: Inspect coolant for signs of oil, rust, or debris, which could indicate a gasket or engine issue specific to high-stress trials bikes like the TXT 300.)
- Replace the drain bolt and tighten it to manufacturer spec. If the washer is damaged or leaking, replace it.
- Refill with new coolant. Pour the coolant slowly into the radiator until full. Squeeze the lower radiator hoses with your hand to help vent air pockets from the system.
- Burp the cooling system. Start the engine (with the radiator cap off) and let it idle for 1–2 minutes. This helps trapped air escape. Add coolant as needed if the level drops. Turn off the engine and top up to just below the filler neck.
- Reinstall the radiator cap securely. Wipe away any spills and check for leaks around the drain bolt and hoses.
- Dispose of old coolant properly. Coolant is toxic–never pour it on the ground or down household drains.
Key Notes for the 2014 GAS GAS TXT Racing 300 Owner
- The TXT Racing 300’s compact radiator and water pump make it more sensitive to overheating than a typical motocross bike. Always use high-quality coolant and replace it more often if you ride in hot or muddy conditions.
- Frequent stops and starts in trials increase heat load on the engine, making a clean, full cooling system critical.
- Inspect hose clamps and all connections for leaks during every coolant change – vibration and crashes can loosen fittings over time.
- If you notice cloudy coolant or any milky appearance, check for water pump seal wear, a common maintenance point for trials motorcycles.
Following this proprietary MotoSport maintenance guide helps you keep your 2014 GAS GAS TXT Racing 300 running cool, reliable, and ready for your next section – whether you ride for fun or competition!
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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.