How to Change the Coolant in a 2022 GAS GAS MC 65
Regular coolant changes are essential to ensure the 2022 GAS GAS MC 65 maintains optimal performance, protects its engine from overheating, and delivers reliable rides for years to come. Here is a step-by-step, MotoSport-exclusive guide to changing coolant on this popular youth motocross bike – along with key things every MC 65 owner should note.
What You Need
- Fresh coolant (type specified by GAS GAS for 2-stroke engines, usually a high-quality ethylene glycol-based coolant)
- Under-bike drain pan
- Socket set (for radiator cap and drain bolt, if equipped)
- Clean rags
- Protective eyewear and gloves
Preparation & Safety
- Always work on a cold engine to avoid burns.
- Wear gloves and protective eyewear. Coolant is toxic and can irritate skin or eyes.
- Change coolant in a well-ventilated area and properly dispose of the old coolant per environmental regulations. Spills can damage paint and harm the environment.
Step-by-Step Coolant Change Procedure
- Secure the dirt bike upright on a stand to ensure level draining and refilling.
- Remove the radiator cap—located on the left side of the gas tank area—to release system pressure. Twist slowly for safety.
- Locate the coolant drain point. On the 2022 GAS GAS MC 65, this is typically a drain bolt at the base of the water pump. Place your drain pan underneath.
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Remove the drain bolt (usually an 8mm or 10mm socket required) and let the old coolant fully drain out.
Tip: Carefully lean the bike from side to side to help evacuate trapped fluid. - Inspect the coolant for debris or discoloration, which may indicate internal corrosion or contamination. If found, flush out the system with distilled water until clear.
- Reinstall and tighten the drain bolt to the manufacturer's torque specification.
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Refill the system through the radiator cap opening. Slowly pour in fresh coolant until the radiator is full.
Note: Do not overfill. Leave a small air gap at the top to allow for expansion. - Remove any trapped air by gently rocking the bike and squeezing radiator hoses. Check for bubbles escaping the filler neck; add coolant if needed.
- Reinstall the radiator cap securely.
- Start the engine and let it idle for a few minutes. Watch coolant level and check for leaks at drain bolt and hose fittings. Shut off engine, let it cool, and top off if necessary.
Special Considerations for the 2022 GAS GAS MC 65
- Engine Size and Design: The 65cc two-stroke is optimized for young riders learning race technique, so keeping the cooling system in top shape is critical for engine longevity and rider confidence.
- No coolant overflow tank: MC 65 uses a simple system without a catch tank. Always check coolant after initial rides post-change, as trapped air bubbles may purge during use.
- Lightweight construction: The MC 65 features lightweight aluminum wheels and minimal bodywork, so be careful during service to avoid damaging radiators or plastics.
Maintenance Intervals & Owner Tips
- GAS GAS recommends routine coolant checks and changes at least once per year, or after any incident of overheating.
- Only use specified coolant types to prevent corrosion, seal damage, or system clogging.
- Rinse off any coolant spills immediately to protect frame paint and graphics.
- Properly dispose of all old coolant—it is harmful to animals and the environment.
Regular coolant maintenance will keep your 2022 GAS GAS MC 65 running cool, safe, and ready for every checkered flag. For all maintenance and upgrade needs, MotoSport has the parts & expertise to keep you riding strong.
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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.