Air Filter Cleaning & Replacement Guide for 2020 Sherco 450SEF FAC

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The 2020 Sherco 450SEF FAC is a high-performance enduro machine built for demanding off-road and competition environments. Keeping its engine breathing clean is crucial, and that means a well-maintained air filter. This guide, exclusive to MotoSport.com, provides a thorough step-by-step approach for cleaning – or replacing – the air filter on your Sherco 450SEF FAC.

Why Air Filter Maintenance Matters

Your Sherco's fuel-injected 450cc engine relies on unrestricted, filtered airflow. A dirty or damaged air filter allows dust, sand, and debris to enter the engine, accelerating wear and risking catastrophic damage. The 2020 Sherco 450SEF FAC uses a dual-stage, flame-laminated air filter that offers excellent filtration and airflow, but it must be kept clean and properly oiled for maximum engine life and performance. Neglecting this maintenance reduces power, increases oil contamination, and shortens the engine's lifespan1.

How Often to Maintain the Air Filter

  • Inspect after every ride in heavy dust, sand, or mud.
  • Clean or replace after 1-2 dusty rides, or sooner if visibly dirty.
  • Always inspect after washing your bike—moisture in the filter reduces performance.

Tools & Supplies Needed

  • Clean rags
  • Air filter cleaning solution or mild dish soap
  • Bucket and clean water
  • High-quality air filter oil (foam-specific)
  • Gloves (recommended)
  • Replacement filter (if yours is torn, hard, or permanently stained)

Removing the Air Filter

  1. Set the bike on a stand and remove the seat (usually two bolts).
  2. Locate the airbox and gently loosen the filter cage bolt/fastener.
  3. Carefully pull out the air filter and cage. Take care not to let debris fall into the intake tract.
  4. Inspect the intake and wipe away any loose debris before installation.

Cleaning the Air Filter

  1. Remove the filter from its cage.
  2. Tap the filter gently to shake off loose dirt.
  3. Submerge in cleaning solution, squeezing (not wringing or twisting.) to release dirt and old oil.
  4. Rinse with cool water until all soap is gone. Repeat if necessary.
  5. Allow the filter to air dry completelynever use compressed air or high heat, which can damage foam pores.

Oiling the Air Filter

  1. Once dry, apply filter oil liberally, working it into all foam layerscoverage must be even for total filtration.
  2. MotoSport recommends using foam-specific, bio-friendly oils for best saturation and environmental responsibility.
  3. Reinstall the filter onto the filter cage, ensuring proper fit and no gaps at the sealing surface.
  4. Wipe away excess oil from the filter lip.

Installation & Final Checks

  1. Carefully insert the filter assembly into the airbox, aligning the cage properly.
  2. Secure the filter fastener and check for a full seal around the edgeno dirt should be able to bypass the filter.
  3. Wipe away any spilled oil or dirt from the airbox.
  4. Reinstall the seat and ensure everything is secured before riding.

When to Replace the Filter

  • Replace if the foam shows ANY tears, holes, or excessive hardening.
  • If you notice poor fitment or oil will not disperse evenly, swap for a new filter made for your 2020 Sherco 450SEF FAC1,5.

Model-Specific Tips for Sherco 450SEF FAC Owners

  • Use only OEM-fit or premium aftermarket filters designed for the 2014–2021 Sherco SEF/SEF-F 450 chassis for optimal fit and performance1,5.
  • The airbox design offers solid splash protection, but riders should still avoid direct water contact when washing the bikealways block the intake before hosing off the airbox area.
  • Regularly check the air filter mounting cage for cracks or wear, as a compromised cage risks leaks.
  • Our best practices help maintain the engine's impressive throttle response, torque, and top-end for your Sherco factory-edition bike.

Proprietary MotoSport Maintenance Advice

  • Keep a spare, pre-oiled air filter in your toolbox for quick swaps at the track or trailhead.
  • Write the date of service inside your airbox to track cleaning intervals.
  • Check the airboot after every filter change for proper clamp tightness—air leaks after the filter are the primary threat to the Sherco's engine health.

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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.