How to Change the Coolant in a 2020 Sherco 250 SEF FACTORY: Step-by-Step Guide

Shop parts for a 2020 Sherco 250 SEF FACTORY Dirt Bike.

Regularly changing the coolant in your 2020 Sherco 250 SEF FACTORY is essential for reliable performance and engine longevity. Below, you'll find a detailed, model-specific procedure to keep your dirt bike's cooling system running optimally—plus key tips just for Sherco owners.

Tools & Materials Needed

  • Drain pan
  • Socket set (including 10 mm socket)
  • Fresh, approved coolant (Minerva Perma Universal D 4 or equivalent, rated to -25°C)
  • New radiator bleed screw gasket (recommended)
  • Torque wrench
  • Clean rag

Preparation

  • Make sure the engine is cool before starting.
  • Set the bike on a level surface and place it in a vertical position for accurate coolant level checks.

Draining the Old Coolant

  • Locate a suitable container underneath the bike to collect the old coolant.
  • Remove the radiator cap to allow air in and help the system drain smoothly.
  • Unscrew and remove the coolant drain bolt (refer to your user manual for the exact location, typically a screw on the water pump housing). Let all coolant drain completely.
    Note: Dispose of drained coolant responsibly—never pour it into the environment.

Filling the System with New Coolant

  • Install the drain bolt back and torque it to 6 Nm.
  • Find the bleed screw on the left side of the radiator. Remove it to allow air to escape as you fill.
    Tip: Always use a new gasket for the bleed screw to avoid leaks.
  • Slowly pour new coolant into the radiator through the filler neck until it flows steadily from the bleed screw without bubbles. Reinstall and torque the bleed screw to 8 Nm.
  • Continue to fill the radiator until the level reaches the "LEVEL" mark on the expansion container (approximately 1.1 liters for this model).
  • Reinstall the radiator cap securely.

Final Steps & System Check

  • Start the engine and let it run for several minutes with the radiator cap on.
  • Check for leaks around the drain plug, bleed screw, and hoses.
  • Once cooled, re-check the coolant level in the expansion tank and top up if needed.

Sherco 250 SEF FACTORY Model Tips

  • This engine uses a closed-loop cooling system. Never substitute with regular water or non-approved fluids; only use recommended coolants to prevent internal corrosion and water pump damage.
  • If you ever spot coolant seeping from the water pump weep hole, this typically signals a seal failure. Replacing the seal on this four-stroke engine requires removing the clutch housing—an advanced task best left to experienced owners or technicians. Always install new gaskets and seals to avoid leaks.
  • Avoid running the engine without coolant, even briefly—this can result in severe engine damage.

Your 2020 Sherco 250 SEF FACTORY is engineered for performance, and regular maintenance is key to enjoying every ride. Keep an eye on coolant levels, watch for signs of leaks, and only use the recommended products for best results.

Related Shopping Categories

Shop Radiators for a 2020 Sherco 250 SEF FACTORY Dirt Bike.

Shop Coolant for a 2020 Sherco 250 SEF FACTORY Dirt Bike.

Shop Temperature Sensors for a 2020 Sherco 250 SEF FACTORY Dirt Bike.

Shop Tools for a 2020 Sherco 250 SEF FACTORY Dirt Bike.

Shop Radiator Hoses for a 2020 Sherco 250 SEF FACTORY Dirt Bike.

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.