How to Change the Coolant in a 2014 GAS GAS EC300ER
Shop parts for your ride now!Changing the coolant on your 2014 GAS GAS EC300ER is a critical part of regular maintenance, helping keep the engine running cool and prolonging its life–especially in the tough conditions this enduro bike is built to handle. Here‘s a step-by-step, MotoSport-exclusive guide tailored to the unique needs of GAS GAS EC300ER owners.
What You Will Need
- Coolant compatible with aluminum motorcycle radiators (GAS GAS recommends a 30 percent glycol mix or high-quality motorcycle coolant)
- Drain pan
- Phillips screwdriver or 8mm socket (for radiator shrouds/plugs)
- Rags for cleanup
- Distilled water (if flushing or diluting coolant concentrate)
- Protective gloves and eyewear
Preparation
- Ensure the engine is cold. Never open the radiator cap on a hot engine to avoid burns.
- Secure the dirt bike upright on a stand for stability.
- Remove the seat and left radiator shroud for easier access to the cooling system.
Draining the Old Coolant
- Locate the radiator cap (top of left radiator) and the coolant drain bolt (typically found at the lowest point of the water pump cover).
- Place a drain pan under the water pump area.
- Slowly remove the radiator cap to relieve any pressure.
- Remove the drain bolt and allow all coolant to drain out. Tilting the bike gently side-to-side can help evacuate more fluid.
- Inspect the spent coolant for excessive rust, oil, or debris – these could indicate deeper issues requiring inspection.
Optional: Coolant System Flush
- If the coolant appears dirty or it‘s been a long time between changes, it‘s wise to flush the system with distilled water.
- Reinstall the drain bolt, fill the radiators with distilled water, and run the engine briefly (1–2 minutes) with the radiator cap off. Then drain the water completely.
Refilling with Fresh Coolant
- Ensure the drain bolt is securely tightened.
- Pour the new coolant slowly into the radiator. Stop periodically to let air bubbles escape – the compact twin-radiator setup of the EC300ER can trap air if filled too quickly.
- Fill until the level reaches just below the bottom of the filler neck.
- Gently squeeze the radiator hoses to help purge trapped air.
Bleeding Air from the System
- Start the engine and let it idle with the radiator cap off. Watch for air bubbles rising as the coolant circulates, topping off as needed.
- Once no more bubbles appear, reinstall the radiator cap.
- Run the bike until it fully heats up, then let it cool and check the coolant level again. Top off as required.
Key Notes for 2014 GAS GAS EC300ER Owners
- This model lacks an automatic electric fan, so regular coolant maintenance is critical if you ride slow technical trails where airflow is minimal.
- Only use approved coolants to avoid damaging the magnesium water pump cover and internal seals.
- Check the radiator cap seal and overflow hose for cracks or leaks when changing your coolant.
- Radiator shrouds can funnel mud and debris to the rads – keep the radiator fins clean and straight for maximum cooling efficiency.
Final Steps
- Reinstall the shroud and seat.
- Wipe away any spilled fluid and dispose of old coolant safely. Coolant is highly toxic to animals!
- Double-check the area for leaks after your first test ride.
With a fresh coolant change, your GAS GAS EC300ER is ready for tough trail action with confidence and longevity!
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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.