How to Change the Coolant in a 2006 GAS GAS EC 250
Changing the coolant in your 2006 GAS GAS EC 250 is essential for proper engine temperature management and long-term reliability. The following guide is crafted exclusively for MotoSport.com and uniquely tailored for owners of this model. Always work with a cool engine to avoid burns–never attempt to open the radiator cap or hoses while the engine is hot.
Tools & Supplies Needed
- Socket or spanner set
- Drain pan
- High-quality motorcycle coolant (compatible with aluminium and magnesium parts)
- Distilled water (if using concentrate)
- Shop rags
Step-by-Step Instructions
-
Ensure the engine is cool.
The pressurized coolant system stores heat—wait at least 30 minutes after riding to begin work. -
Remove the seat & panels.
Access the radiator by taking off the seat and right side panel using the proper tool. -
Locate the radiator cap and drain bolt.
The radiator cap is at the top of the left radiator; the drain bolt is generally found on the water pump cover (right engine side). -
Position the drain pan and remove the drain bolt.
Place your pan beneath the water pump and unscrew the drain bolt or remove the lower radiator hose. Let all coolant drain out thoroughly. -
Flush the system (optional but recommended).
For best results, flush with distilled water. If you are changing coolant types (e.g., from clear factory fluid to green anti-freeze), thoroughly flush with water and compressed air to ensure full removal of the previous coolant. -
Replace drain bolt and inspect sealing washers.
Examine for damage and replace washers if needed to prevent leaks. -
Refill with coolant.
Fill slowly at the radiator cap opening. Tilt the bike gently to help vent trapped air from the system. -
Bleed any remaining air.
Squeeze the radiator and coolant hoses while the system fills. Run the engine briefly, then shut it off and top coolant to just below the cap base. - Reinstall the radiator cap securely.
- Reattach plastics & seat.
Model-Specific Notes for the 2006 GAS GAS EC 250
- Coolant Type: The EC 250 may ship with a transparent, colorless coolant. Replacing it with high-quality ethylene glycol (green) or propylene glycol-based coolant is acceptable and will not damage gaskets or engine components.
- Mixture Recommendation: For best heat transfer and corrosion protection, use a 60/40 mix of distilled water and coolant unless you are using a pre-mixed product.
- Break-In Period: If your EC 250 is newly rebuilt, avoid hard acceleration during the first hour or 20 km. Normal riding may foul the spark plug, so check and replace if necessary after break-in.
- Atmospheric Sensitivity: This model's carburetor and cooling system are sensitive to environmental temperature and altitude. Adjust air screw and jet needle as needed for ideal fuel-air ratio to prevent overheating.
- General Advice: Always use motorcycle-specific coolant. Automotive coolant may contain silicates or chemicals harmful to motorcycles with magnesium or aluminium cases.
Finishing Checks
- Check for leaks around the water pump, hoses, and radiator cap.
- After the first short ride, re-check coolant level and top off if necessary.
- Monitor engine temperature gauge or warning light for unusual spikes.
Changing the coolant keeps your GAS GAS EC 250 running cool and strong, ensuring the longevity of your investment. For replacement hoses, radiator caps, or coolant, Shop parts for your ride now!
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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.