How to Change the Coolant in a 2021 GAS GAS TXT RACING 250
Routine coolant changes are essential for optimal engine health and performance on your 2021 GAS GAS TXT RACING 250. The procedure is straightforward but requires attention to detail and model-specific considerations, ensuring your trials machine stays ready for the most demanding rides.
What Makes This Model Unique?
The 2021 GAS GAS TXT RACING 250 is a purpose-built trials bike, emphasizing precise handling and minimal weight. Its compact two-stroke engine uses a sealed, pressurized cooling system, so correct coolant maintenance is crucial. Due to the bike's design, coolant access points are more compact compared to standard off-road motorcycles, so following a precise process is important.
Before You Start
- Allow the engine and cooling system to cool completely before attempting to open the radiator cap or hoses. Hot coolant can cause burns and sudden release of pressure.
- Prepare a suitable drain pan and ensure you have fresh, high-quality motorcycle coolant that meets or exceeds the manufacturer's specifications.
Step-by-Step Guide: Changing the Coolant
- Remove Protective Components
Take off any guards or panels that may obstruct direct access to the radiator and hoses. On the TXT RACING 250, the radiator cap is typically positioned under the fuel tank or behind plastic protection. - Locate the Drain Point
Find the lowest hose connection on the cooling system. This allows gravity to help fully empty the system. If there is a dedicated drain bolt, it will be near the water pump area or lower section of the radiator.
Place your catch pan beneath the drain area. - Drain the Old Coolant
Carefully loosen the radiator cap (or a bleed screw, if equipped) to relieve any residual pressure. Open the drain hose or bolt and allow the old coolant to flow completely into your pan.
Inspect drained coolant. Coolant with rust, debris, or oily appearance could suggest internal issues requiring prompt attention. - Flush the System (Recommended)
Pour a small amount of distilled water into the radiator to flush out any residue, then let it drain completely. Avoid using tap water, as minerals may harm the system or precipitate corrosion. - Reinstall Drain Plug and Tighten
Ensure the drain bolt or hose is properly secured and not cross-threaded to avoid future leaks. - Refill with Fresh Coolant
Slowly fill the radiator with the specified coolant blend, leaving sufficient space for expansion. Many owners use a 50/50 premix of distilled water and biodegradable motorcycle coolant, but always check your owner's manual for model-specific recommendations.
Fill the system in stages – add, pause, let bubbles escape, then top up until just below the filler neck. - Bleed Air from the System
Some TXT models have a bleed screw at the highest point; open it until a steady stream of coolant (no air bubbles) flows out, then close it.
Gently rock the bike side to side or squeeze the hoses to help any trapped air escape. - Recheck and Secure Everything
Refit the radiator cap securely. Reinstall any protection panels or guards you removed before starting. Wipe away any spilled coolant from the frame, hoses, or engine. - Start the Engine and Inspect
Start the bike and let it idle. As it warms up, watch for leaks. After a few minutes, shut off the engine, let it cool, and recheck the coolant level, topping up if needed.
Pro Tips for Your 2021 GAS GAS TXT RACING 250
- Check for abrasion or chafing on cooling hoses, a known vulnerability on tightly packaged trials bikes. Replace any worn hoses promptly.
- Change coolant every 1–2 years or sooner if racing or riding in extreme environments.
- Tighten hose clamps to specification, as overtightening can crack plastic fittings common on lightweight trials radiators.
- This model uses a low-capacity, high-efficiency cooling system – even minor coolant loss can cause overheating.
Environmental Safety
Dispose of old coolant properly through a recycling facility or hazardous waste center. Never pour used coolant onto the ground or down a household drain.
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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.