How to Change the Oil in a 2021 Sherco 450 SEF FACTORY

Shop parts for your ride now.

Changing the oil in your 2021 Sherco 450 SEF FACTORY is a key maintenance step to keep your dirt bike running at its best. This step-by-step guide is exclusive to MotoSport.com and covers all tools required, procedures, and call-outs unique to this model.

Tools and Materials Needed

  • 8mm socket (side case bolts if needed)
  • 17mm socket (drain bolt removal)
  • 4mm Allen wrench (if removing screens/pre-filters)
  • Oil catch pan
  • New oil filter (required every oil change)
  • New crush washers for drain bolts
  • Sherco-recommended engine oil: SAE 10w60, 1.1L
  • Clean rags
  • Gloves (recommended for safety)

Important Model-Specific Call-Outs

  • The 2021 Sherco 450 SEF FACTORY has two drain bolts with magnetic plugs on the bottom of the engine. Always replace the crush washers during installation for a secure seal.
  • Oil filter must be replaced at every oil change. Do not skip this step.
  • Recommended oil quantity: 1.1 liters of SAE 10w60.
  • Always dispose of used oil and filters at a certified recycling center—never in drains or the environment.

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    Start the bike and let it idle for a few minutes. This thins out the oil, making it drain completely.
  2. Secure the Motorcycle
    Upright the bike on a stand so it's level. Remove any skid plate if installed for easier access.
  3. Remove the Oil Fill Cap
    Loosen the oil fill cap on top of the engine. This allows oil to drain faster and more thoroughly.
  4. Remove Drain Bolts
    Locate the two drain bolts (use the 17mm socket). Place the oil catch pan beneath. Remove each bolt and let the oil drain completely. Inspect and clean both magnetic drain plugs; replace the crush washers.
  5. Remove the Oil Filter
    Use the correct tool (usually 8mm socket) to unscrew the oil filter cover. Remove the old oil filter, making note of orientation.
  6. Install New Oil Filter
    Place a new filter into the housing in the same orientation. Place a new O-ring on the cover if present. Reinstall and torque the oil filter cover to 15 Nm.
  7. Clean and Reinstall Pre-filters (if equipped)
    If your model has oil strainer screens, remove them (often with a 4mm Allen), clean, and reinstall.
  8. Reinstall Drain Bolts
    Insert drain bolts with new crush washers and torque to 15 Nm each.
  9. Refill Engine with New Oil
    Pour 1.1L of fresh SAE 10w60 oil into the oil fill port. Let it settle, then check the level in the sight glass with the bike upright. Add a small amount if needed to reach the correct level.
  10. Check for Leaks and Final Verification
    Start the engine and let it idle. Check for oil leaks at the drain bolts and oil filter cover. Shut off the bike and recheck oil level, topping up if necessary.

Extra Tips for the 2021 Sherco 450 SEF FACTORY Owner

  • Always replace the filter and crush washers at every oil change – this prevents leaks and ensures proper filtration.
  • Clean both magnetic drain plugs thoroughly. Ferrous debris buildup is normal but record any excess, as it could indicate wear.
  • Torque specs are critical. Use a torque wrench set to 15 Nm for both drain bolts and oil filter cover.
  • The recommended oil, SAE 10w60, is vital for performance and longevity in the Sherco engine.
  • Environmental note: Always dispose of used oil and filters responsibly.

Conclusion

By following these steps, you ensure the optimal performance and long life of your 2021 Sherco 450 SEF FACTORY. Regular oil changes are one of the most critical services you can perform on your dirt bike.

Related Shopping Categories

Shop Motor Oil for a 2021 Sherco 450 SEF FACTORY Dirt Bike.

Shop Oil Filters for a 2021 Sherco 450 SEF FACTORY Dirt Bike.

Shop Oil Drain Pans for a 2021 Sherco 450 SEF FACTORY Dirt Bike.

Shop Tools for a 2021 Sherco 450 SEF FACTORY Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2021 Sherco 450 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.