How to Change the Coolant in a 2008 GAS GAS TXT PRO 280
Keeping the coolant fresh and effective in your 2008 GAS GAS TXT PRO 280 is essential for optimal performance, especially given this model's lightweight alloy engine. Regular coolant changes prevent overheating and corrosion, ensuring long-term reliability for your trials bike. Follow these proprietary MotoSport instructions for a safe and complete coolant change.
What You'll Need
- Coolant designed for lightweight alloy motors (ethylene glycol-based, non-silicate, motocross/trials-specific if available)
- Drain pan
- Ratchet and appropriate sockets or Allen keys
- Funnel
- Clean rags
- Distilled water (for rinsing if needed)
- Protective gloves
Preparation – Safety First
- Do not attempt this procedure with a hot engine: Let the bike cool completely before touching the radiator cap or hoses to avoid severe scalding from pressure release and hot fluid†.
- Keep coolant off painted surfaces and skin. Change any contaminated clothing if spills occur.
- Work in a well-ventilated space and properly dispose of old coolant per local regulations.
Step-by-Step Guide
-
Remove the Seat and Gas Tank.
Start by removing the seat and fuel tank for the best access to the radiator and hoses. Close the fuel cock and detach the fuel tube. The fuel tank is secured with an upper-front Allen screw (M4) and should be lifted out from the chassis after removal†. -
Locate the Radiator Cap and Drain Point.
Find the radiator cap on top of the left side and the drain bolt or lowest hose connection at the water pumptypically on the lower left side of the engine†. -
Drain the Old Coolant.
Place the drain pan beneath the drain bolt. Unscrew the radiator cap slowly to release any residual pressure. Then loosen the drain bolt (or disconnect the lower hose) to let all coolant flow into your pan. Tilt the bike gently if needed to ensure complete drainage. -
Flush if Needed.
If the old coolant is dirty, flush the system with distilled water. Reinstall the drain bolt, fill with distilled water, and run the engine briefly. Drain again and repeat until the water runs clear. -
Refit the Drain Bolt and Refill.
Secure the drain bolt or hose clamp, then use a funnel to refill the radiator with fresh coolant. Fill slowly to avoid air pockets, tapping hoses gently to help purge bubbles. Fill until just below the neck of the filler. -
Bleed the Cooling System.
Without refitting the radiator cap, lean the bike side to side and gently squeeze the lower radiator hose to help remove trapped air. Top off coolant if the level drops as air escapes. -
Run and Recheck.
Start the engine and let it idle with the cap off for a few minutes, again tapping hoses and watching the coolant level. Once the level stabilizes, replace the radiator cap securely. -
Reassemble and Inspect.
Reattach the gas tank and seat. Clean up any spills and wipe down the frame where fluid may have dripped. Take a short test ride, then let the bike cool and verify coolant level and check for leaks.
Special Notes for Your GAS GAS TXT PRO 280
- This bike's alloy cylinder head and radiator are sensitive to old or improper coolant; always use a recommended formula to avoid internal corrosion†.
- The cooling system on GAS GAS trials bikes is compact and holds a relatively small volume, so pay careful attention to completely removing old coolant and ensuring no airlocks remain.
- Be mindful of electrical connectors and wiring when removing the airbox or fuel tank for access to the cooling system.
Why Regular Coolant Changes Matter
- Fresh coolant maintains the engine's thermal stability under slow-speed, high-load conditions typical in trials.
- Proper coolant choice prevents scale buildup and maintains the water pump and seals in optimal condition.
- Old coolant can cause corrosion, risking failure of the water pump, radiator, and engine parts unique to the TXT PRO 280's design.
Routinely checking and changing your coolant ensures your 2008 GAS GAS TXT PRO 280 continues to deliver reliable, winning performance. Trust MotoSport for the right parts and expert advice to keep you riding at your best.
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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.