How to Change the Coolant in a 2024 GAS GAS MC 50 Dirt Bike
Keeping your 2024 GAS GAS MC 50 running cool and at peak performance means proper maintenance of the cooling system. Periodic coolant changes are essential–especially for a competition-grade 2-stroke like the MC 50. Below, MotoSport guides you through a step-by-step coolant change specific to your model, with tips tailored to the unique features of your bike.
What You Need
- Appropriate engine coolant (silicate-free, motorcycle-specific recommended for aluminum systems)
- Phillips screwdriver or 8 mm socket
- Drain pan suitable for fluids
- Small funnel
- Fresh water (distilled is best) for flushing, if required
- Personal protective gear (gloves & eye protection)
Before You Begin
- Ensure the engine is completely cool to prevent burns & excess vapor release.
- Work in a well-ventilated area and avoid open flames.
- Protect painted or plastic surfaces from coolant spills—coolant is toxic and can damage finishes.
Step-by-Step: Changing the Coolant
- Remove the seat and left side panel:
- Use a T-handle or Phillips screwdriver to remove the retaining bolts on the seat and left side radiator shroud. Set aside the hardware and panels carefully. - Locate the radiator cap:
- On the MC 50, the radiator cap is on the left side, above the engine. Open the cap slowly to release any residual pressure. - Drain the old coolant:
- Find the coolant drain bolt—it is on the right side of the cylinder water pump cover (the lowest bolt; check for a copper washer). Position your drain pan underneath. - Remove the drain bolt, and also gently tilt the bike to the side if needed to ensure all coolant is evacuated. - Let the system drain completely. - Flush (Recommended):
- If the coolant looks dirty or contaminated, reinstall the drain bolt, fill the radiator with distilled water, run the engine briefly (~1min), then repeat the drain procedure. This helps clear out any old residue. - Refit the drain bolt:
- Inspect and clean the drain bolt and copper washer. Tighten the bolt to manufacturer specification; avoid overtightening to prevent thread damage. - Add new coolant:
- Using a small funnel, slowly pour fresh coolant into the radiator until full. - Gently rock the bike side-to-side to help air escape. Top off if necessary. - Vent and top off:
- With the radiator cap off, briefly start the engine and let it idle. Watch for bubbles—this helps bleed trapped air. Shut off the bike, top off if the level drops, then securely replace the radiator cap. - Reinstall panels and seat
What 2024 GAS GAS MC 50 Owners Need to Know
- The MC 50 uses an advanced, closed coolant system and lightweight radiator—never use regular car coolant or water alone, as they can cause corrosion or overheating.
- Be meticulous about flushing and removing air pockets, as trapped air can lead to hot spots in the cylinder or even engine seizure.
- Inspect hoses, radiator, and water pump for leaks or wear during coolant changes—the MC 50's compact design can hide small leaks.
- Never reuse drained coolant. Dispose of all fluid at an approved recycling facility.
- If coolant comes into contact with skin or eyes, rinse immediately with water and consult medical advice if irritation persists.
Tips for Peak Performance
- Check coolant level regularly, especially after hard rides or extreme conditions.
- Use only recommended coolants & adhere to change intervals outlined in your owner's manual for optimal reliability.
- Consider upgrading to high-performance coolants if you frequently race or ride in hot environments.
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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.