How to Change the Coolant in a 2010 GAS GAS EC125
Changing the coolant on your 2010 GAS GAS EC125 is a straightforward yet essential part of keeping your two-stroke running strong. Over time, coolant can degrade and fail to protect your engine from overheating or corrosion. The EC125's aluminum components and high-performance engine make regular coolant changes especially important for optimal durability and performance. Follow this MotoSport guide to ensure a proper coolant change every time.
What You'll Need
- Fresh coolant suitable for aluminum motorcycle engines (avoid anything with silicate-based additives)
- Socket set or spanner (typically 8mm or 10mm for the drain bolt)
- Drain pan
- Funnel
- Clean rags
- Torque wrench (recommended for reinstallation)
Steps to Change the Coolant
- Preparation: Make sure the engine is cool before starting. Place the bike on a stand and remove the right side radiator shroud for access.
- Drain the Old Coolant:
- Locate the coolant drain bolton the EC125 it's typically at the base of the water pump cover on the right side of the engine case.
- Place a drain pan under the bolt and remove it, allowing the coolant to fully drain. Remove the radiator cap to speed up draining.
- If desired, you can tilt the bike slightly to ensure a thorough drain.
- Inspect the Coolant Condition:
- If you notice dark or gritty coolant, this may indicate corrosion or debris. Consider running a flush with distilled water and letting it fully drain before adding new coolant.
- Reinstall the Drain Bolt:
- Inspect the drain bolt's sealing washer for wear; replace if needed.
- Tighten the bolt to manufacturer torque spec (typically around 7-10 Nm for small case bolts).
- Add New Coolant:
- Using a funnel, fill the radiator up to the inner ledge or the designated full line. Avoid overfilling.
- The 2013 EC125 manual (similar engine platform) lists a coolant capacity around 1.1 liters.
- Bleed the System:
- The EC125 cylinder head has a small bleeder screw. Crack this screw when filling to release trapped air, then retighten once coolant flows without bubbles.
- Top up the radiator after bleeding as the level may drop.
- Reinstall Components:
- Replace the radiator cap and the plastic shroud.
- Warm Up the Engine:
- Start the bike and let it idle with the radiator cap on. Check for leaks and listen for abnormal noises.
- Once cooled, recheck and top off the coolant level as needed.
Important Notes for 2010 GAS GAS EC125 Owners
- The EC125 uses a high-revving two-stroke engine. Maintaining the correct coolant level is crucial for preventing overheating, especially during aggressive riding or racing.
- Never use pure water or silicate-based automotive coolants–they may cause corrosion inside the engine and radiator.
- If you notice dark or gritty debris in old coolant, monitor your bike for further signs of corrosion or mechanical wear. This can be an early sign of water pump or head gasket issues.
- Stick to the recommended coolant change interval–typically once per season or every 20-40 hours of riding, whichever comes first.
- Always dispose of old coolant responsibly, as it is toxic to animals and the environment.
Final Tip
Coolant quality and level are vital on the 2010 GAS GAS EC125. Replacing coolant regularly helps your engine stay cool and prolongs the life of the cylinder and water pump. If you need OEM cooling system parts, gaskets, or coolant for your EC125, MotoSport carries everything you need for a worry-free maintenance routine.
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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.