How to Change the Coolant on a 2017 GAS GAS EC250
Keeping your 2017 GAS GAS EC250 cooling system serviced is critical for long engine life and optimal performance–especially during hard trail rides, races, or hot conditions. Here is a detailed, model-specific guide designed for MotoSport.com customers to walk you through every step of a coolant change on the EC250.
What You Need
- Coolant compatible with the GAS GAS EC250 (check your manual for requirements; for most climates use a 50/50 premix or mix as specified)
- Drain pan
- Socket set or open-end wrenches (10mm or as appropriate for drain bolt size)
- Funnel
- Distilled water (for rinsing or flushing)
- Shop towels
- Protective gloves and eyewear
Step-by-Step Coolant Change Procedure
- Allow the Engine to Cool
Make sure your engine is completely cool. Hot coolant is dangerous under pressure, and the radiators can cause burns. - Access the Radiator
Place your EC250 on a level surface or bike stand for stability. Remove the seat and side panels if necessary for clearer access to the radiators and filler neck. - Remove the Radiator Cap
Unscrew the radiator cap. This will release any residual pressure and allow the coolant to drain quickly and evenly. - Locate and Remove the Coolant Drain Bolt
Find the coolant drain bolt on the bottom of the water pump or, for some cases, at the base of the left side radiator.
Place your drain pan under the drain bolt location, then loosen and remove it. Allow all coolant to drain completely into the pan. - Flush the System (Optional but Recommended)
For optimal cooling and engine protection, flush the system with distilled water. Reinstall the drain bolt temporarily, fill the radiator with distilled water, run the engine for about two minutes, and then repeat the drain procedure. Repeat until drained water runs clear. - Reinstall the Drain Bolt
Check the sealing surface and bolt washer. Reinstall the drain bolt and tighten to specification. For the EC250, typical torque for small bolts is about 10 Nm (always confirm with your owner's manual). - Add New Coolant
Using a funnel, slowly fill the radiator with the recommended coolant. Fill up to the base of the filler neck without overfilling. - Bleed Trapped Air
With the radiator cap still off, briefly start the engine and let it idle for a minute. This helps circulate coolant and release trapped air bubbles. Top off as needed, then reinstall the radiator cap securely. - Inspect for Leaks and Test
Start the bike and let it reach operating temperature. Check for coolant leaks at the drain bolt, hose clamps, and around the radiator cap. After the engine fully cools down, recheck coolant level and top off if needed.
Model-Specific Notes for the 2017 GAS GAS EC250
- Review your manual for proper coolant type–GAS GAS recommends adjusting coolant mix for extreme cold climates.
- The EC250 has a two-radiator setup–drain both sides for a complete change. Take care to inspect hoses for cracks or soft spots.
- If the engine overheats or coolant appears discolored after a change, inspect the water pump seal and radiator cap. Both are common wear points on two-stroke performance bikes.
- Always maintain the coolant level between the minimum and maximum marks. Overfilling can cause overflow and underfilling may risk engine overheat and damage.
Changing your coolant is straightforward maintenance but allows your EC250 to perform at its best–plus, regular fresh coolant helps prevent costly repairs down the trail. Keep your cooling system dialed and get back to riding with confidence and peace of mind.
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.