How to Change the Coolant in a 2008 GAS GAS EC125: Complete Owner's Guide
Keeping your 2008 GAS GAS EC125's cooling system in prime condition is essential for engine longevity and peak performance–especially for enduro and off-road use where thermal loads and mud can put extra strain on your bike. A periodic coolant change prevents overheating, corrosion, and internal scaling. Below you'll find a model-specific flush and refill guide, plus a few crucial notes for EC125 owners.
What You Need
- 1.1 liters of fresh, high-quality motorcycle coolant (avoid plain water or car antifreeze)
- A drain pan
- Socket or Allen wrench (to fit your radiator drain bolt and cylinder head bleeder if equipped)
- Funnel, shop towels, and safety gloves
Key Details for GAS GAS EC125 Owners
- The 2008 EC125 features a 1.1 L coolant capacity for the complete system–do not overfill .
- This two-stroke's aluminum components are sensitive to corrosion; always use coolant formulated for motorcycles with corrosion inhibitors designed for mixed-metal systems .
Step-by-Step Coolant Change Procedure
- Cool the engine completely. Never open a hot radiator.
- Remove the seat and tank shrouds if needed for access to the radiator cap.
- Place the drain pan under the water pump or lower radiator hose area. Locate the drain bolt (often on the water pump cover at the right side, below the engine case).
- Open the radiator cap, then remove the drain bolt. Let all old coolant drain out.
- If mud or old fluid looks especially dirty, flush the system with clean distilled water by refilling, running the engine briefly (with the drain plug replaced), and draining again.
- Replace the drain bolt with a new crush washer if needed. Tighten securely–typically just snug, do not over-torque aluminum threads.
- Fill the radiator slowly with premixed coolant until it reaches the base of the filler neck.
- If your EC125 has a cylinder head bleeder bolt (common on many two-strokes), crack it open once fluid is seen at the filler; this bleeds trapped air. Tighten again and finish filling as needed.
- Tilt the bike gently side-to-side or gently squeeze the coolant hoses to free trapped air bubbles.
- Reinstall the radiator cap, start the bike, and let it idle until it gets up to working temperature. Check for leaks at the drain bolt and hose clamps.
- After cooling, recheck the coolant level and top off if necessary. Road test briefly, then allow bike to cool again and verify level one more time.
Additional Tips for the 2008 GAS GAS EC125
- Inspect hoses and radiator for damage or leaks during the process. Replace any degraded or bulging hoses.
- If the engine temperature fluctuates or the fan runs often after the change, rebleed the system for trapped air.
- Always properly dispose of old coolant; it is toxic to pets and the environment.
Routine coolant changes every 1-2 years or after heavy races will help keep your EC125 running strong and prevent expensive cooling system repairs. For OEM-matched gaskets, hoses, or performance coolant upgrades, MotoSport has everything you need for a maintenance-ready ride.
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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.