How to Change the Coolant in a 2025 GAS GAS MC-E 5
Keeping your 2025 GAS GAS MC-E 5 at its peak starts with unsung hero maintenance tasks–like a regular coolant change. Although the MC-E 5 is an electric mini dirt bike and not subject to traditional engine heat in the same way as its gas-powered siblings, it still uses a liquid cooling system for the controller and motor. Here s a robust, proprietary MotoSport guide to safely and efficiently replace the coolant, plus some model-specific insights every MC-E 5 owner should know.
Before You Begin
- Required tools: Basic hand tools (screwdrivers, socket set), a drain pan, safety gloves, clean rags, and a funnel.
- Coolant type: Always use a high-quality, non-silicate, phosphate-free coolant suitable for aluminum components. There are coolants designed specifically for electric motorcycles–check your manual or MotoSport s parts listings for compatibility.
- Safety: Ensure the bike is powered off, fully cooled, and unplugged from any chargers before starting maintenance.
Step-by-Step Coolant Change Process
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Locate the Cooling System Components
Identify the radiator (or coolant reservoir), coolant hoses, and the drain and fill points. On the MC-E 5, the radiator is situated at the front, well protected by bodywork, and the coolant reservoir is to one side. Consult your owner s manual to confirm locations. -
Drain the Old Coolant
Place your drain pan under the drain bolt at the lowest point of the system, typically the base of the radiator or the lowest coolant line. Remove the radiator cap or reservoir cap first (if equipped) to release system pressure, then loosen the drain bolt to let the coolant fully drain. Allow all fluid to empty and tip the bike slightly if needed. -
Inspect and Clean
Inspect the coolant hoses and connections for signs of wear, swelling, or cracking. Wipe up any spills with a rag, and replace the drain bolt s sealing washer if it is damaged. -
Refill with Fresh Coolant
Tighten the drain bolt securely. Using a clean funnel, slowly pour new coolant into the reservoir or radiator until it reaches the proper level (consult the MC-E 5 manual for exact capacity and fill point). Avoid overfilling. -
Bleed Air from the System
The MC-E 5–like its larger siblings–benefits from a proper bleed to ensure the cooling system is air-free. Locate the small bleeder bolt (often on the radiator or highest hose point). Slightly loosen this to allow air to escape as you top off the coolant gently. Once coolant runs steadily from the bleeder, retighten. -
Double-Check Levels & Test
Top up if needed. Reinstall all caps. Wipe down the area, then power the bike and briefly run the cooling pump to circulate coolant (refer to your specific service mode, as there is usually a diagnostic or service function for this on the MC-E 5 s display). Power down, and recheck the coolant level, topping up if necessary.
Things Specific to the MC-E 5
- Electric Motor Cooling: Unlike gas models, your MC-E 5 s liquid cooling safeguards sensitive electronics and motor components from thermal stress, particularly during slow-speed or high-output riding. This means coolant changes are critical for both longevity and rider safety under all conditions.
- No Hot Engine Parts: You don t have to wait for hot surfaces to cool, but always ensure the system is de-energized before starting any work.
- Coolant Types: Never use old-fashioned, automotive-style coolants with silicates or phosphates, as these can damage the aluminum and electric components of your bike.
- Inspection Schedule: The MC-E 5 has longer recommended coolant intervals than combustion bikes, but annual checks and flushes are wise for riders in dusty or muddy conditions.
Eco Note
Dispose of old coolant responsibly–it s toxic to pets and wildlife. Take it to an authorized recycling center in a sealed container.
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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.