How to Change the Coolant in a 2020 GAS GAS EC 250
Changing the coolant on your 2020 GAS GAS EC 250 is an essential part of regular maintenance that keeps your engine running cool and prevents overheating – especially important for hard enduro and trail use, where engine temperatures can spike quickly. The EC 250 uses a pressurized closed system that must be handled carefully. Follow this MotoSport-exclusive guide for your model:
Tools and Supplies Needed
- Fresh coolant designed for off-road motorcycles
- Basic hand tools (sockets, Allen keys, screwdrivers)
- Clean drain pan
- Funnel
- Protective gloves and eyewear
- Distilled water for flushing if needed
Step-by-Step Coolant Change Procedure
- Let the bike cool completely. Never open the radiator or hoses while hot – the pressurized system can release hot coolant and cause burns.
- Remove side panels or seat as needed to access the radiator filler cap. You want clear visibility of the cap and hoses.
- Position a clean drain pan below the water pump drain bolt (usually at the lowest point on the right crankcase cover).
- Remove the radiator cap to allow air in, which helps the system drain completely.
- Loosen and remove the coolant drain bolt. Allow coolant to drain fully. Check and clean the bolt and O-ring before reinstalling.
- For a thorough flush, disconnect the lower radiator hose and tilt the bike side-to-side. You can flush lightly with distilled water, but make sure all water is drained before refilling with coolant.
- Reinstall the drain bolt (torque to spec if available).
- Slowly fill the radiator with new coolant. Use a funnel to avoid spills. Fill to the top of the radiator neck.
- Bleed air from the system: Some EC models have a small bleed screw or port on the cylinder head. Crack it open gently until coolant seeps out, then tighten. If none, tilt the bike gently side to side and squeeze the hoses.
- Replace the radiator cap. Start the engine and let it idle with the cap on. Monitor the level after a few minutes and top off if needed.
- Inspect for leaks around the drain bolt, hose fittings, and radiator cap.
Notes Specific to the 2020 GAS GAS EC 250
- This model is a high-performance 2-stroke designed for enduro use. Hard riding or muddy conditions may require more frequent coolant changes to prevent overheating or clogged radiators.
- Always use coolant compatible with aluminum components and O-rings, as used throughout the EC 250’s system.
- If you ever tip the bike over hard, inspect hoses and clamps for leaks before your next ride.
- Check the owner’s manual for the recommended gasket and drain bolt torque – always replace damaged O-rings to prevent slow leaks.
Why Regular Coolant Changes Matter
- Old coolant loses its boiling/freeze resistance and lubricating properties, increasing the risk of overheating.
- Contaminated coolant can lead to corrosion – especially in a bike with premium aluminum radiators like the EC 250.
With the right tools and attention to detail, changing your EC 250’s coolant ensures reliable off-road performance – and prevents costly engine repairs down the trail.
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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.