How to Change the Coolant in a 2024 Sherco 125 SE FACTORY

Shop parts for a 2024 Sherco 125 SE FACTORY Dirt Bike.

Changing the coolant in your 2024 Sherco 125 SE FACTORY is an essential task that helps maintain optimal engine temperature and ensures reliable performance on the trail. This guide provides step-by-step, Sherco-specific instructions and key maintenance tips to help owners of this high-performance two-stroke dirt bike get the job done right.

What Makes the 2024 Sherco 125 SE FACTORY Unique?

  • The 125 SE FACTORY features a high-revving two-stroke engine with a compact, lightweight chassis designed for aggressive riding and technical terrain.
  • Factory spec components, such as premium radiators and tailored cooling circuits, mean routine cooling system care is critical for longevity – avoid overheating by keeping coolant fresh.
  • Always use coolant recommended for magnesium-aluminum engine construction and compatible with O-rings – avoid car coolants that may corrode specialized metals or degrade seals.

Preparation

  • Start with a cold engine to avoid burns.
  • Raise the motorcycle on a steady stand for full access.
  • Have a drain pan, rags, appropriate socket wrenches, fresh motorcycle-specific coolant, and a funnel ready.

Step-by-Step Coolant Change Process

  1. Remove the Radiator Cap
    Locate the radiator cap (on the left radiator, top front of the bike). With the engine cold, remove the cap slowly to relieve any pressure.
  2. Locate the Coolant Drain Bolt
    The 125 SE FACTORY uses a coolant drain screw on the water pump housing, typically on the lower right side of the engine. Place your drain pan underneath.
  3. Drain the Old Coolant
    Use the appropriate socket to loosen and remove the drain bolt. Allow all coolant to drain. After draining, inspect the old coolant for debris or contamination. Replace the sealing washer or O-ring on the bolt if damaged.
  4. Flush the System (Recommended)
    Reinstall the drain bolt (torque to 10 Nm) and pour distilled water into the radiator. Replace the cap, run the bike for two to three minutes, then repeat the draining procedure. This extra flush removes old residue – repeat until water runs clear.
  5. Add New Coolant
    Reinstall the drain bolt securely. Use a funnel to pour new motorcycle-grade coolant into the radiator until it is just below the filler neck. Open bleed screws on the cylinder or water pump (if equipped) to allow trapped air to escape, then close them as coolant appears.
  6. Bleed and Top Off
    With the cap off, start the engine and let it idle briefly, gently tipping the bike side to side to help release air bubbles. Shut the engine off as the fluid begins to circulate. As air escapes, top off as needed.
  7. Check & Reinstall Radiator Cap
    Once coolant is at the correct level and air is purged, reinstall the radiator cap.
  8. Inspect and Warm Up
    Start the motorcycle and run until warm. Check for leaks and monitor the coolant level. After the engine cools, recheck level and top off if necessary.

Special Notes for the 2024 Sherco 125 SE FACTORY

  • Proper coolant volume and flow are essential for high-strung two-stroke operation under enduro conditions.
  • Check hoses, clamps, and the radiator cap for wear at every coolant service.
  • If experiencing persistent air in the system or coolant loss, inspect for gasket issues or possible internal leaks – this is especially important on newer bikes designed for high compression.
  • Always dispose of old coolant safely and in accordance with local environmental regulations.

Keeping your 2024 Sherco 125 SE FACTORY at peak performance requires regular coolant changes and careful attention to detail. Trust only premium fluids and parts, and make every ride trouble-free by maintaining your bike the MotoSport way.

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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.