How to Change the Coolant in a 2022 GAS GAS EX 250F: A MotoSport Exclusive Guide

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Changing the coolant in your 2022 GAS GAS EX 250F is an essential part of maintaining peak performance and ensuring the longevity of your bike’s engine. Coolant dissipates engine heat and provides vital freeze and corrosion protection. Below, MotoSport outlines a proprietary, model-specific process designed just for your EX 250F.

Required Tools – What You Need

  • Phillips and flathead screwdrivers
  • Socket wrench set
  • Drain pan
  • Funnel
  • New coolant (GAS GAS recommends an ethylene glycol-based motorcycle coolant)
  • Protective gloves – coolant is toxic and can irritate skin
  • Clean rag

Step-by-Step Instructions

1. Preparation – Safety First

  • Allow your engine and cooling system to cool completely before starting. NEVER open the radiator cap or system components while hot due to the risk of severe burns and scalding fluid under pressure.
  • Place your bike upright using a stand on a flat surface. Secure it with tension belts if necessary to prevent tipping while you work.

2. Remove the Radiator Cap

  • Carefully wipe the area around the radiator cap to prevent dirt from contaminating the system.
  • Slowly turn the radiator cap counterclockwise to release any residual pressure before removing it.
  • This model’s radiator cap is set to 1.8 bar (26 psi) pressure for optimal cooling performance—inspect the cap for damage and ensure it seals properly after reinstalling. If you notice problems with the seal, replace it for safety.†

3. Locate and Remove the Drain Bolt

  • The coolant drain bolt is positioned at the lowest point on the water pump cover, typically on the right side of the engine near the water pump.
  • Position your drain pan beneath it.
  • Remove the bolt with your socket wrench, allowing coolant to fully drain.
  • For maximum drainage on the EX 250F, gently tilt the bike side-to-side by supporting it upright and rocking slightly on the stand.

4. Rinse (Optional, but Ideal)

  • If you are switching coolant types or the drained coolant was heavily contaminated, flush the system using distilled water. Refit the drain bolt, fill with distilled water, run the bike briefly, cool, and drain again before proceeding with new coolant.

5. Replace the Drain Bolt

  • Check the bolt and any sealing washer (crush washer or O-ring) for wear; replace if necessary for a leak-free seal.
  • Torque the drain bolt to manufacturer specification (consult your user manual for precise torque; overtightening can damage threads).

6. Fill with New Coolant

  • Insert a clean funnel into the radiator filler neck.
  • Slowly pour coolant until nearly full, rocking the bike to release any trapped air.
  • Start the engine and let it run for 1-2 minutes with the radiator cap off to bleed remaining air bubbles out of the system.
  • Add more coolant if needed to fill to the top. Do not overfill past the bottom of the filler neck.
  • Reinstall the radiator cap securely.

7. Post-Service Check

  • Inspect for leaks around the drain bolt and hoses.
  • Clean any coolant spilled on the frame – coolant is slippery and toxic to animals.
  • Properly dispose of old coolant according to your local regulations—never pour it down drains or on the ground.
  • After your first ride, double-check coolant level once the bike cools, and top up as needed.

Model-Specific Notes for the 2022 GAS GAS EX 250F

  • This model features lightweight radiators and integrated overflow for efficient temperature control, especially important during aggressive off-road conditions.
  • Inspect radiator fins for damage or blockage whenever servicing the coolant—bent fins can be gently straightened to maintain airflow and avoid overheating.†
  • If you regularly ride in sand or mud, clean debris from the radiator exterior to optimize cooling and prevent excessive engine heat.

Chemical & Environmental Safety

  • If coolant contacts your skin or eyes, flush with plenty of water and seek medical attention if irritation persists.
  • Change clothing immediately if you spill coolant on yourself to avoid skin irritation.

Coolant changes on your 2022 GAS GAS EX 250F are recommended at 12-month or 135-hour intervals, whichever comes first, for maximum engine protection. Stay on top of this essential maintenance to keep your bike running reliably mile after mile.

† Reference: GAS GAS owner’s manual, radiator and cooling system sections.

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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.