How to Change the Coolant in Your 2025 GAS GAS ES 350F
Keeping the cooling system maintained on your 2025 GAS GAS ES 350F is crucial for performance – especially in demanding off-road conditions. Regular coolant changes help prevent overheating and maintain engine longevity. Read on for a MotoSport-exclusive guide tailored to this model, including unique tips every owner should know.
What Makes the ES 350F Special?
- High-Performance Motor: The ES 350F features a robust DOHC engine shared by the MC and EC lines, engineered for responsiveness and consistent power delivery.
- Advanced Cooling System: GAS GAS equips this bike with efficient radiators – critical for racing and aggressive trail riding.
- Easy Maintenance Access: Typical for the 2025 ES 350F, you'll find maintenance points like the radiator cap and water pump cover easy to reach, streamlining service routines.
Supplies Needed
- Fresh coolant (compatible with aluminum radiators – check for silicate-free)
- Socket wrench set
- Catch pan for old coolant
- New seal ring (recommended for water pump cover screw)
- Clean rags
- Protective gloves
Step-by-Step Coolant Change Process
- Ensure Engine is Cold: Never open the cooling system while hot to prevent scalds and avoid pressurized coolant spray. Always allow the 350F to cool completely.
- Stand the Bike Upright: Position the motorcycle upright on a level surface for accurate draining and refilling.
- Locate Water Pump Cover: Place your catch pan underneath. On the ES 350F, the water pump is on the right side of the engine.
- Remove Drain Screw: Use your socket wrench to remove the screw at the bottom of the water pump cover and let the old coolant drain out fully. Expect about 1.2 liters (1.3 qt) capacity. Inspect the old coolant for contamination.
- Replace Seal Ring: Swap out the old seal ring with a new one – this prevents leaks upon reassembly.
- Reinstall Screw: Once drained, reattach and tighten the screw to 10 Nm (7.4 lbf ft). Do not overtighten.
- Refill with New Coolant: Remove the radiator cap. Carefully pour in new coolant until the level sits about 10 mm above the radiator fins.
- Reinstall Radiator Cap: Confirm it is securely fitted.
- Test Run & Level Check: Start the bike briefly and run at idle. Let it cool. Recheck the coolant level and top off if necessary.
Coolant Change Frequency for ES 350F
- Inspect every 10-15 operating hours in heavy duty use (racing, hot climates).
- Change coolant at least once a year regardless of use – old coolant loses its protective qualities.
Safety & Environmental Tips
- Wear gloves to avoid skin contact. Rinse with water immediately if exposed.
- Never dispose of old coolant down the drain. Collect and recycle according to local regulations.
- Prevent spills – antifreeze can be toxic to animals.
ES 350F Owner Insights
- Check Radiators: After hard rides, inspect radiator fins for mud or debris which can impede cooling. Use low pressure water only.
- Torque Specs: Always use the recommended torque on fasteners – overtightening can damage covers or threads on GAS GAS bikes.
- Compatible Fluids: Confirm the coolant type is compatible with aluminum and modern gasket materials used on the ES 350F.
Following these steps will keep your 2025 GAS GAS ES 350F running cool and reliable all season.
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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.