How to Change the Coolant in a 2014 GAS GAS EC300E
Changing the coolant in your 2014 GAS GAS EC300E is an essential part of routine maintenance that keeps your two-stroke running cool and reliable, especially during hard riding or hot weather. The GAS GAS EC300E features a liquid-cooled two-stroke engine, and following the right process will extend engine life and prevent overheating or internal corrosion. Use these steps and tips customized for your EC300E:
What You Need:
- Recommended coolant: Antifreeze and water mixture (typically 50:50). For GAS GAS, a 30% premix like GRO GCC 30% is suitable for extreme cold protection, but a 50:50 universal motorcycle coolant works for most climates.
- New gasket for drain bolt (recommended for perfect sealing)
- Basic hand tools: Socket set, flat screwdriver, funnel, catch pan, clean rags
- Distilled water (if flushing system)
- Gloves and eye protection
Step-by-Step Coolant Change:
-
Preparation
Ensure the engine is cold to avoid burns. Place the dirt bike upright on a stand. Remove the front and side plastics if better radiator access is needed. -
Drain the Old Coolant
Place a catch pan under the engine. Locate the coolant drain bolt, typically on the water pump cover's lower side. Remove the radiator cap first for better draining.
Using a socket, carefully remove the drain bolt and let the coolant drain completely. Inspect the old coolant for contamination or rust as a sign of possible internal issues. -
Flush (Optional but Recommended)
For best maintenance, pour distilled water into the radiator and let it drain out to flush any old coolant and debris. Repeat until water runs clear. Reinstall the drain bolt with a new gasket for proper sealing, and tighten to specification (usually around 9 Nm for similar models; check your manual to confirm). -
Refill with New Coolant
Secure the drain bolt. Using a funnel, slowly fill the radiator with fresh coolant through the left-hand radiator cap. Fill to the specified level and check for any leaks. -
Bleed Air from the System
To prevent air locks and hotspots, tilt the bike side-to-side and gently squeeze the radiator hoses to help bubbles escape. Top up coolant as necessary.
Start the engine with the radiator cap off and let it idle until the thermostat opens (you'll see the coolant circulate and possibly a burp of air). Once the level drops, top up again as needed, then secure the radiator cap. -
Reassemble and Test
Reinstall any removed plastics, clean spilled coolant, and wipe off the engine area. Test ride the bike, watching the temperature. After cooling down, recheck and top off the coolant if the level has dropped.
Model-Specific Notes for the 2014 GAS GAS EC300E
- The EC300E uses a narrow twin-radiator design—ensure both radiators are full after bleeding.
- Pay extra attention to the radiator cap seal and water pump gasket for leaks. Always use a new drain bolt gasket if possible.
- If fitting temperature sensors or aftermarket parts (like a Trail Tech gauge), do so during coolant service for easier access.
- Check the radiator hoses and clamps for brittleness or cracks; replace if needed to avoid leaks during a ride.
- The recommended coolant interval is every 2 years or more often if riding in muddy or high-heat conditions.
Final Tips
- Never use plain tap water–always use distilled water for flushes and a proper antifreeze mix for refills.
- Inspect the radiator fins for mud, debris, or damage whenever you change the coolant.
- If the bike overheats or loses coolant after a change, rebleed the system to remove trapped air.
- Dispose of old coolant responsibly; it’s toxic and harmful to the environment.
Keeping your GAS GAS EC300E cooling system serviced with fresh coolant will deliver consistent, reliable power whether you’re riding trails or tackling technical enduro routes!
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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.