How to Change the Coolant in a 2024 Sherco 450 SEF FACTORY

Shop parts for a 2024 Sherco 450 SEF FACTORY Dirt Bike.

Maintaining the cooling system of your 2024 Sherco 450 SEF FACTORY is critical for engine longevity and maximum performance. This exclusive MotoSport guide walks you through the specific steps to safely and efficiently change the coolant, as well as model-specific notes every Sherco 450 SEF owner should know.

What You Need

  • New coolant (type recommended in your owner's manual)
  • Catch pan
  • Socket set (particularly 10mm and 6mm)
  • Funnel
  • Distilled water (for flushing, if desired)
  • Clean rags
  • Replacement sealing washer for drain bolt (optional, if needed)

Preparation

  • Ensure the engine is completely cool to avoid burns.
  • Position the bike upright on a stable stand for safety and best drainage.

Draining the Old Coolant

  • Locate the coolant drain bolt, typically found on the lower side of the water pump. For the Sherco 450 SEF FACTORY, this is accessed easily on the right side of the engine .
  • Place a catch pan underneath and slowly remove the drain bolt with a 10mm socket. Allow the coolant to fully drain out.
  • You may also remove the radiator cap (with the engine cold) to allow faster and more complete drainage.
  • Inspect the sealing washer on the drain bolt, replacing if worn or damaged to prevent future leaks.

Optional: Flushing the System

  • If the coolant appears dirty or the system hasn't been serviced in a while, flush the radiators and engine with distilled water. Fill, run the engine briefly, let it cool, then drain again. Repeat until clear.

Refilling with Coolant

  • Install the drain bolt and torque to 6 Nm as specified for Sherco water pump housing.
  • Mix coolant according to product instructions (some coolants require mixing with distilled water – check your label and owner manual).
  • Slowly pour coolant into the radiator until it's full, allowing air to escape. Gently squeeze radiator hoses to help purge trapped air.
  • Fill the overflow reservoir if equipped.
  • Replace the radiator cap.

Bleeding Air – The Sherco Method

  • Start the engine and let it idle with the radiator cap off, occasionally revving gently. Watch for bubbles – when they stop and the level drops, top off coolant as needed.
  • Reinstall the cap, run for several minutes, then check and top off once more after fully cooling down. Check for leaks from the drain bolt and hose clamps.

Model-Specific Tips for the 2024 450 SEF FACTORY

  • This model uses a high-performance, closed-circuit cooling system. Check gasket and O-ring integrity during service, especially if the bike is used for hard enduro or racing.
  • Sherco factory bikes have precision radiators; never run the bike with low coolant or introduce contaminants. Only use coolant approved for aluminum engines.
  • If you notice coolant at the weep hole beneath the water pump, this could indicate a worn seal that must be serviced using OEM parts – consult your dealer or refer to official workshop diagrams for details .
  • Basic service does not require clutch or water pump disassembly unless you are addressing a leak or internal component replacement.

Aftercare & Final Checks

  • Recheck coolant level after the first ride as air may still purge from the system.
  • Inspect the entire cooling system for leaks or loose hoses.

Routine coolant replacement keeps your Sherco 450 SEF FACTORY running at its best, prevents overheating, and ensures a long engine life. For OEM replacement parts, gaskets, and premium coolants, rely on MotoSport for your maintenance needs.

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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.