How to Change the Coolant in a 2018 GAS GAS EC250: MotoSport Guide
Shop parts for your ride now!Keeping your 2018 GAS GAS EC250 running cool is essential for reliable performance, especially on tough trails and during long rides. Routine coolant changes prevent overheating, corrosion, and costly engine damage. Follow this MotoSport-exclusive guide for a safe and effective coolant change specifically for the EC250 two-stroke.
What Makes the 2018 GAS GAS EC250 Unique?
The EC250 features a lightweight two-stroke engine and a compact, race-focused chassis. Its cooling system is robust but relies on regular maintenance for optimal performance. Owners should note that coolant intervals are crucial for long-term engine life, especially given the high-rpm operation this engine sees. Always use a high-quality ethylene glycol-based coolant with anti-corrosive additives compatible with aluminum components. If in a cold climate, confirm your coolant's freeze protection aligns with local temperatures.
Tools – What You Need
- Phillips or flathead screwdriver (depending on radiator shrouds)
- 10mm or 8mm socket/wrench (for drain screw and panels)
- Drip tray or container (minimum 2L capacity)
- Funnel and clean rags
- New coolant (see above for recommendations)
- New drain screw gasket (recommended)
- Gloves and eye protection
Step-by-Step Coolant Change Procedure
- Let the engine cool completely.
Hot coolant can cause severe burns–never open the system when the engine is hot. - Remove the seat and fuel tank if necessary.
For easier access to the radiator cap, you may need to remove the seat and fuel tank. Most bolts are accessible with an 8mm socket. - Place a drip tray beneath the water pump area.
- Locate and remove the drain screw.
The drain screw is typically on the lower part of the water pump cover (right side of the engine). Remove the screw and carefully allow all coolant to drain into your container. Remove the radiator cap to speed flow. - Inspect and replace the drain screw gasket.
Always use a new gasket on the drain screw to prevent leaks. Tighten the screw to 9 Nm using a torque wrench if available. - Flush the system (optional but recommended).
Pour a small amount of distilled water into the radiator, then reinstall the cap and drain screw. Start the bike for a few seconds (do not overheat), then drain again. This removes any sediment or old coolant residue. Repeat if the water appears contaminated. - Refill the radiator with new coolant.
Pour coolant slowly through the left-hand radiator cap until full. Rock the bike gently side-to-side to release trapped air. Fill just to the base of the filler neck. - Reinstall all parts and check for leaks.
Reinstall the radiator cap, seat, and fuel tank. Wipe off any spilled fluid. Start the engine and let it idle until warm, then shut off. Re-check the coolant level – add more if necessary after the system burps out any remaining air.
Special Tips & Reminders for EC250 Owners
- Never mix coolant types. If unsure which coolant was used previously, flush thoroughly before filling with new coolant.
- Check hoses and clamps for wear or leaks while the coolant is drained.
- If you ride in cold temperatures, verify that your coolant provides adequate freeze protection for the climate.
- Dispose of used coolant responsibly. Never pour old coolant down drains or on the ground.
- Inspect and clean the crankshaft bearing lubrication hole during major service–a blocked oil path reduces engine reliability and is unique to this model's maintenance routine.
When to Change Coolant
The EC250 requires coolant replacement at least once per year, and after any major engine work. If you race or ride in harsh conditions, check levels and condition more frequently.
Ready for Your Next Adventure?
Keeping your 2018 GAS GAS EC250 cooling system in peak shape ensures performance and peace of mind on every ride. For all your OEM and performance parts, trust MotoSport for fast shipping and expert service.
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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.