How to Change the Coolant in a 2022 GAS GAS EX 300: A MotoSport Guide
The 2022 GAS GAS EX 300 is a modern two-stroke enduro bike known for its lightweight chassis and advanced engine performance. Regularly changing the coolant is vital to ensure optimal cooling, engine longevity, and reliable power delivery, especially on high-demand off-road terrain. This proprietary MotoSport guide takes you through every step–with special notes for EX 300 owners.
What You'll Need
- Fresh engine coolant (ensure it's compatible with aluminum radiators and offers freeze/boil-over protection)
- Clean funnel
- Drain pan
- 8mm or 6mm socket (confirm your drain bolt size by visual inspection)
- Pliers or screwdriver (for some radiator cap access panels)
- Gloves and eye protection
- Deionized or distilled water for flushing (if desired)
- Shop rags
Step-by-Step: Changing Your EX 300's Coolant
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Ensure Safety
- Let the engine cool completely to avoid burns–the cooling system is under pressure when hot.
- Work in a ventilated area and wear eye protection. Coolant is toxic and irritating to skin and eyes.
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Remove the Skid Plate or Panels (if needed)
- Some models require removing plastic guards or the skid plate for easy access to the water pump and drain bolt. Use a socket or screwdriver as required.
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Open the Radiator Cap
- Carefully loosen and remove the radiator cap (top right radiator). Doing this before draining allows coolant to flow freely and drains faster. If there are any plastic covers, remove those first.
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Locate and Remove the Coolant Drain Bolt
- The drain bolt is typically on the water pump cover, near the bottom of the right engine case. Position a drain pan beneath.
- Loosen and remove the drain bolt. Allow all coolant to empty.
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Flush (Optional but Recommended)
- If the coolant is dirty or if mixing types, flush with distilled water. Replace the drain bolt, pour water into the radiator, and let it drain again to remove residue. Repeat as needed.
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Inspect Sealing Washer and Reinstall Drain Bolt
- Check the drain bolt washer (replace if damaged or crushed). Tighten the bolt securely, but do not over-tighten!
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Add New Coolant
- Using a clean funnel, slowly pour coolant into the right radiator. Fill to just below the neck, allowing for expansion.
- On EX 300, both radiators are interconnected, so once the right radiator is filled, check the left to ensure they're balanced.
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Bleed Air Pockets
- Squeeze the upper radiator hose to help move air. You may need to gently rock the bike or briefly remove and replace the cap after running the engine for a minute.
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Reinstall Radiator Cap and Covers
- Secure the radiator cap and replace any plastic panels or skid plates removed earlier.
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Run and Recheck
- Start the engine and let it idle for a few minutes. Keep an eye on the temperature warning lights or display. Shut down, recheck the coolant level, and top off as needed.
- Examine the area for leaks around the drain bolt and coolant hoses.
Special Notes for 2022 GAS GAS EX 300 Owners
- Coolant Type: Always use coolant specifically designed for aluminum radiators and modern two-stroke engine materials.
- Capacity: Typical capacity is around 1.0–1.2 liters, but check your owner’s manual to confirm for your bike.
- Radiator Cap: Use only the correct pressure cap to maintain cooling efficiency–the stock cap is usually 1.4 bar.
- Prevent Overheating: If you ride slowly in tough sections, consider adding a coolant recovery tank or a high-quality coolant that resists boil-over for improved protection in harsh conditions.
Proper Coolant Disposal
- Never pour used coolant down a drain or on the ground. Collect in a sealed container and take it to your local hazardous waste facility.
By following these steps, your 2022 GAS GAS EX 300 will be ready for the toughest rides–with a reliable, protected cooling system.
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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.