How to Change the Coolant in a 2011 GAS GAS EC 250
Regular coolant changes are vital for your 2011 GAS GAS EC 250 to ensure optimal engine temperature, prevent overheating, and maintain performance on any trail. The process is straightforward, but paying attention to a few model-specific notes will help you avoid common issues and keep your dirt bike in top shape.
What You Need
- 50/50 mix of antifreeze and distilled water (total system capacity is 1.1 liters for the EC 250)
- Drain pan
- Basic hand tools (socket or wrench set for drain bolt)
- Clean rags
- Protective gloves and eye protection
Preparation
- Allow the engine to cool completely before starting. Hot coolant under pressure is dangerous and can cause burns.
- Set the motorcycle upright and secure it on a stand for stability.
Draining the Old Coolant
- Locate the radiator cap and turn it counterclockwise to the first stop. Wait for any built-up vapor pressure to release, then remove it fully.
- Position your drain pan under the water pump drain screw, located at the bottom of the water pump cover.
- Remove the drain screw to let the old coolant flow out. Be careful–coolant can be slippery if it contacts tires, making them hazardous.
- Inspect coolant: Some EC 250 bikes may have clear or colorless coolant from the factory. Replace with the recommended mixture, not just water.
Flushing the System (Recommended for Old or Contaminated Coolant)
- Once drained, reinstall the drain screw temporarily and fill the radiator with distilled water.
- Replace the radiator cap and gently run the engine for a few minutes–do not let it overheat.
- Repeat the drain procedure. This rinse helps remove residue or debris unique to this two-stroke model's cylinder and water jacket design.
- Replace the drain screw securely once finished.
Refilling with New Coolant
- With the drain screw back in place, slowly fill the radiator with the 50/50 coolant mix until it sits just below the rubber seal inside the radiator neck.
- Tilt the bike slightly left and right to encourage trapped air to escape.
- Start the bike briefly with the radiator cap off, watching for air bubbles as the thermostat opens. Top off as needed without overfilling.
- Replace the radiator cap securely.
Final Checks
- Wipe up any spilled coolant immediately, especially from wheels, frame, and engine.
- Start and idle the bike, monitoring temperature and checking for leaks at the drain screw or radiator cap.
- Let the engine fully cool, then recheck your coolant level. Top off if necessary.
Owner Notes for the 2011 GAS GAS EC 250
- This model uses a pressurized radiator system and is sensitive to air pockets, so thorough bleeding is key.
- Always use a non-silicate, motorcycle-specific coolant–avoid automotive coolants with silicates, which can damage seals and water pump parts.
- Never allow coolant to contact brake rotors or pads, as it lowers friction and compromises braking performance.
- The EC 250's engine is built for extreme conditions, but keeping up on coolant changes will prevent hot spots and premature wear.
- If your riding conditions involve mud or sand, inspect radiators for clogs and flush more frequently to avoid overheating.
Proper cooling system maintenance will keep your 2011 GAS GAS EC 250 ready for everything from trail rides to race day—giving you full confidence in any environment.
Related Shopping Categories
Shop Radiator Hoses for Your Ride
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.