Air Filter Cleaning – Replacement Guide for 2020 Sherco 125SE-R

Shop parts for a 2020 Sherco 125SE-R Dirt Bike.

For sustained peak performance of your 2020 Sherco 125SE-R, proper air filter care is critical. This guide delivers a proprietary MotoSport approach to air filter cleaning and replacement, tailored specifically to your bike’s dual-layer, high-flow foam filter system.

About the 2020 Sherco 125SE-R Air Filter

  • Dual-layer foam construction: Designed for off-road protection, the air filter combines a coarse outer layer to trap larger particles with a fine inner layer to catch dust and silt for maximum engine safety and airflow.
  • One-piece design: Flame-laminated for durability, with a fused seam minimizing risk of debris getting between layers.
  • OEM part number: 156016—ensure any replacements precisely match fitment for the 2020 125SE-R.

How Often to Clean or Replace

  • Clean the filter every 5–10 hours of use, or more often in dusty conditions.
  • Replace whenever you detect tears, loose seams, or the foam retains dirt even after cleaning. Annual replacement is recommended for aggressive riders.

Tools & Supplies Needed

  • Clean workspace and gloves
  • Suitable foam air filter cleaner and fresh foam air filter oil
  • Sealing grease (optional, but recommended for best airbox seal)
  • Replacement filter (OEM 156016 or approved aftermarket twin-layer)

Cleaning Instructions

  1. Remove the Seat & Filter:
    Release the seat latch, then unclip the airbox cover. Detach the filter cage from the intake carefully to avoid dislodging dirt into the air boot.
  2. Inspect – Preclean:
    Tap the filter gently to shake away loose debris. Inspect for tears, hard spots, or split seams. If any are present, discard and install a fresh filter.
  3. Wash:
    Submerge the filter in cleaning solution, squeezing (never wringing.) to flush out dirt. Change rinse water as needed until the filter is completely clean.
  4. Dry:
    Let the filter air dry—avoid using compressed air or heat sources, which can damage the foam.
  5. Oil – Work Thoroughly:
    Pour new filter oil evenly across the foam. Massage to ensure total coverage of both layers. Remove any excess oil to prevent restricting airflow.
  6. Inspect Filter Cage – Reinstall:
    Clean the filter cage and airbox. Optionally apply a thin layer of sealing grease to the edge of the filter for a perfect airbox seal. Refit the filter securely to the cage, then reinstall in the airbox and replace the cover and seat.

Special Notes for 2020 Sherco 125SE-R Owners

  • A precise-fitting, dual-stage filter is essential on the 125SE-R, as the two-stroke engine is especially sensitive to unfiltered dirt and precise airflow for optimum power.
  • Inspect the sealing ring for wear each cleaning cycle—this model relies on a greaseless sealing surface for maximum dust protection between airbox and filter.
  • The recess of the airbox is compact; handle filters carefully to avoid introducing dirt. Always wipe down the air boot before reassembly.

Replacement Tips

  • Always use a replacement filter with the OEM shape and thickness to maintain airflow and proper seal. Genuine and quality aftermarket options (matching OEM 156016) offer best results.
  • Consider keeping a spare pre-oiled filter on hand for mid-ride swaps, especially in heavy dust conditions.

Keep your 2020 Sherco 125SE-R breathing freely—clean and replace the air filter regularly for optimal horsepower, throttle response, and long engine life. MotoSport has the right parts and expertise to keep you on the trail.

Related Shopping Categories

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Shop Intake Parts for a 2020 Sherco 125SE-R 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.