How to Change the Coolant in a 2004 GAS GAS TXT PRO 280
Keeping your 2004 GAS GAS TXT PRO 280's cooling system in top shape is essential for performance and longevity. Follow this MotoSport-exclusive guide for a safe, effective coolant replacement – and learn key model notes to keep your trials bike in race-ready condition.
What You Need
- Fresh coolant (motorcycle-specific, premixed or mixed per coolant specs)
- Drain pan
- 8 mm socket or wrench
- Phillips screwdriver
- Rags
- Funnel
- Safety gloves and glasses
Step 1: Let the Engine Cool Fully
Never open the radiator cap or drain coolant while the engine is hot. Severe scalding can result from hot coolant under pressure.
Step 2: Locate the Radiator Cap and Drain Point
- On the TXT PRO 280, the radiator cap is typically found under the fuel tank. Remove the seat and tank mounting as needed for access.
- The lowest point in the coolant system – usually a hose connection or separate drain bolt on the right side of the engine – allows for full fluid drainage.
Step 3: Drain the Old Coolant
- Place a drain pan under the water pump or lowest point in the cooling circuit.
- Carefully loosen the drain bolt or disconnect the lowest hose (often secured with a hose clamp), allowing coolant to fully empty into the pan.
- Open the radiator cap to ensure complete drainage.
Step 4: Inspect Hoses and Clamps
- Look for any cracks or bulges in hoses and check clamps for tightness. Replace as necessary to avoid future leaks.
Step 5: Refit the Hose or Bolt
- Secure any disconnected hose and tighten the drain bolt, ensuring a snug fit – overtightening can damage the connector or crush the hose.
Step 6: Refill with New Coolant
- Slowly pour the new coolant into the radiator via the fill neck using a funnel to prevent spills.
- Fill up to just below the cap neck, allowing air pockets to surface. Let the bike sit for several minutes to settle the fluid.
Step 7: Bleed Air from the System
- With the cap still off, gently rock the bike side-to-side to help trapped air escape.
- Top up if necessary, then fit the radiator cap securely.
Step 8: Check for Leaks & Confirm Proper Operation
- Start the bike and let it warm up briefly, watching for leaks around hoses, clamps, and the drain point.
- After cooling, double-check coolant level and top off if needed.
Model-Specific Tips: 2004 GAS GAS TXT PRO 280
- This bike uses a compact, high-flow cooling system – ensure all connections are tight to prevent leaks under high-rev, slow-speed trial conditions.
- Handle all gaskets and o-rings with care, as older rubber may be brittle.
- The radiator cap is slightly hidden under the fuel tank – avoid forcing tools or bending cooling fins for access.
- Inspect the fan (if equipped) for free operation and clear debris from radiator fins during service.
Additional Maintenance Reminders
- Always dispose of old coolant safely – do not pour down drains or onto the ground.
- Check your owner's manual for specific coolant type and capacity recommendations.
- It's a great time to inspect your air filter and carburetor access, as the TXT PRO 280 allows for straightforward airbox removal during major maintenance.
MotoSport is your source for top-quality parts and fluids for every ride. Keep your TXT PRO 280 ready for the next section – performance starts with proper care!
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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.