How to Change the Coolant in a 2022 GAS GAS EX 250
Maintaining your 2022 GAS GAS EX 250’s cooling system is crucial for peak performance, engine longevity, and safety on every ride. Routine coolant changes ensure optimal engine temperature regulation and protect against corrosion and freezing. This guide provides step-by-step instructions specific to your EX 250, as well as important model notes every owner should know.
Things to Know Before Starting
- Never open the radiator cap or loosen any cooling system components when the engine is hot—the system is pressurized, and you risk severe burns from hot coolant or steam.
- Allow the engine and cooling system to cool completely before beginning the procedure.
- Wear gloves and eye protection. If coolant contacts your skin or eyes, flush thoroughly with water and consult a doctor as needed.
- Use high-quality, motorcycle-specific coolant with the correct antifreeze properties–avoid automotive coolants with silicates or phosphates that may damage seals and aluminum components.
Tools & Materials Needed
- Drain pan
- 8mm or 10mm wrench (check owner’s manual for bolt size)
- Funnel
- Suitable coolant (engineered for aluminum engines, pre-mixed preferred)
- Clean rags
Coolant Change Instructions
- Preparation
- Place the dirt bike upright on a stable stand, ideally on a non-slip surface.
- Ensure the engine and radiator are cool to the touch.
- Locate the radiator cap—on the right-hand side of the radiator under the shrouds.
- Draining Old Coolant
- Position a drain pan beneath the water pump area of the engine (left side of the bike).
- Remove the radiator cap to allow air flow and faster draining.
- Locate and remove the coolant drain bolt–on models like the 2022 EX 250, the drain bolt is typically a lower engine case bolt on the water pump cover. Consult your manual to confirm exact placement.
- Let the coolant fully drain from the system. Tilt the bike gently side-to-side for complete drainage.
- Inspect coolant for signs of contamination (oil, debris). If excessive, further system inspection is warranted.
- Reinstall and tighten the drain bolt to the recommended torque specification.
- Flushing (Optional but Recommended)
- If desired, flush the system with distilled water to remove any residual old coolant. Fill, drain, and repeat until water runs clear.
- Make sure to drain all water before refilling with coolant.
- Refilling with Fresh Coolant
- Using a funnel, slowly pour new coolant into the radiator neck until it reaches the top.
- The EX 250 features a bleeder screw—usually located on top of the cylinder head or nearby. Crack this screw slightly to allow trapped air to escape as you fill the radiator, then retighten when coolant begins to weep out.
- Add coolant until the radiator is full. Replace and tighten the radiator cap securely.
- Bleeding the System & Checking for Leaks
- Start the engine and let it idle for several minutes. Gently rock the bike side to side to release any remaining air.
- Turn the engine off, let it cool, then recheck coolant level. Top off if necessary.
- Inspect all connections for leaks and ensure the drain bolt is secure.
2022 GAS GAS EX 250 Owner Notes
- The standard radiator cap pressure for this model is 1.8 bar (26 psi)–ensure yours meets this spec to avoid boiling or pressure issues.
- If riding in sand, regularly inspect and clean the radiator fins for optimal airflow.
- Check the owner’s manual for your EX 250’s recommended coolant change interval—typically once per year or after racing in muddy/wet conditions.
- Always use non-silicate, motorcycle-appropriate coolant to protect the magnesium and aluminum components used in the bike.
- Avoid mixing coolant types. Always flush the system if switching coolant brands or formulations.
Routine cooling system maintenance keeps your 2022 GAS GAS EX 250 performing at its best, protecting your investment and your ride. If you need replacement coolant, gaskets, or tools, Shop parts for your ride now!
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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.