How to Change Coolant in a 2023 Sherco 450 SEF FACTORY

Shop parts for a 2023 Sherco 450 SEF FACTORY Dirt Bike.

Maintaining optimal engine temperature is essential for the high-performance 2023 Sherco 450 SEF FACTORY. This guide walks you through the proper steps to change the coolant–an essential service to ensure reliability, performance, and long-term durability. The cooling system in this model is engineered for aggressive off-road riding and should always be properly serviced to prevent overheating and potential engine damage.

What You Need

  • Coolant compatible with aluminium racing engines (avoid silicate-based solutions that may harm your Sherco’s system)
  • Drain pan
  • Socket set
  • Torque wrench
  • Protective gloves & safety glasses
  • Clean rags

Step-by-Step Instructions

  1. Prepare Your Sherco
    Place your 450 SEF FACTORY upright on a stable stand. Remove the seat and, if necessary for access, the radiator shrouds. Make sure the engine is cool before proceeding.
  2. Locate the Coolant Drain Plug
    The drain plug is typically found at the bottom of the water pump housing on the right side of the engine.
  3. Drain the Old Coolant
    Position your drain pan beneath the water pump. With a suitable socket, carefully remove the coolant drain plug. Let all coolant flow into the pan. Remove the radiator cap to help speed the draining process and reduce spillage.
    Note: Proper disposal of used coolant is essential–never pour coolant into the ground or standard waste streams.
  4. Inspect System for Debris and Leaks
    Take this opportunity to examine the radiator and visible hoses for debris, corrosion, or leaks. The 2023 Sherco features high-efficiency radiators that can become obstructed with mud after hard use.
  5. Refit the Drain Plug
    Once draining is complete, clean the drain plug threads and reinstall the plug. Tighten it to 6 Nm using a torque wrench to ensure a proper seal without damaging threads or the pump housing.
  6. Add Fresh Coolant
    Slowly pour new coolant into the radiator until it reaches the fill neck. Gently rock the bike from side-to-side and squeeze the coolant hoses to help eliminate trapped air. Top off as necessary.
  7. Bleed the System
    Air pockets can cause engine hot spots. Start the engine and let it idle with the radiator cap off. Monitor coolant level as the thermostat opens and topping off until air bubbles no longer appear. Do not let coolant spill–keep rags handy.
  8. Check and Reinstall Components
    Replace the radiator cap and refit the seat and shrouds. Check for leaks around the drain plug and hoses. Wipe up any spilled coolant.
  9. Final Inspection
    Warm up your engine and confirm via the sight glass and overflow tube that the system is holding pressure and there are no leaks.

Things to Know About the 2023 Sherco 450 SEF FACTORY

  • Always use a new paper gasket if removing the water pump housing to prevent leaks.
  • OEM torque specs are critical–overtightening hardware can crack the fragile aluminium housings.
  • Watch for weep hole leaks at the bottom of the water pump–just a few drops can indicate a failing shaft seal, which should be replaced promptly to prevent coolant mixing with engine oil.
  • If coolant appears cloudy or rusty, or you spot oil floating on top, further inspection of pump seals may be required.
  • Never substitute automotive coolant–always use performance motorcycle coolant formulated for high-RPM single cylinders.

Routine coolant changes protect your Sherco’s advanced four-stroke engine, especially under the harsh conditions for which it was engineered. For replacement parts and superior service products, MotoSport stocks everything you need to keep your 450 SEF FACTORY running cool and strong all season long.

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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.