Air Filter Cleaning – Replacement Guide for 2020 Sherco 300SEFFAC

Shop parts for a 2020 Sherco 300SEFFAC Dirt Bike.

Keeping the air filter clean on your 2020 Sherco 300SEFFAC is essential for optimal engine performance – especially in challenging off-road conditions. The Sherco 300SEFFAC runs a high-compression, four-valve DOHC engine built for reliability and consistent power, but only when the air intake is protected from dirt and debris.

Tip: The 300SEF Factory Edition features a premium closed cartridge KAYABA fork and semi-perimeter CrMo steel frame with an aluminum subframe. All maintenance, including air filter service, should be performed with this advanced setup in mind to prevent accidental damage to suspension or frame components during disassembly.

Recommended Air Filter Types

  • OEM-style foam filters provide maximum filtration and easy serviceability. Dual-stage, flame-laminated filters (like No Toil or Twin Air) are made specifically for Sherco 300 SEF models from 2014–2024 and ensure correct fitment and sealing for the 2020 300SEFFAC

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  • Pre-oiled filters like Twin Air bring factory-level consistency and fast, hassle-free installation with biodegradable oils pre-applied

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Air Filter Cleaning Steps

  1. Remove seat – access the airbox. On the 300SEFFAC, use quick-release fasteners or seat bolts as indicated in your owner's manual. Position the seat away from the bike to prevent dirt falling in during service.
  2. Carefully extract the air filter. Loosen the filter retaining cage/bolt. Gently remove the filter, avoiding contact with the air boot to keep debris out of the intake.
  3. Inspect air filter for excessive dirt, oil, rips, or hardened foam. If damaged or permanently stained, replace the filter to prevent engine damage.
  4. Clean with recommended cleaner. Use a foam filter-specific cleaner or gentle dish soap and warm water. Massage (do not twist) the filter until clean; rinse thoroughly to remove all soap/oil residues.
  5. Allow the filter to dry fully – avoid heat sources. Water or solvent left in the foam can draw dirt into the engine or degrade oil coverage.
  6. Apply fresh air filter oil evenly, working it into the foam for consistent coverage. For the best protection, use biogradable, motorcycle-specific filter oil, ensuring no bare spots. Pre-oiled options are available for quick swaps.
  7. Reinstall air filter. Align the sealing ridge, making sure the filter seats snugly with no visible gaps. Secure the filter cage and check that the filter is well-seated.
  8. Reinstall seat securely – ensure proper fit without pinching the filter or airbox seal.

How Often Should You Clean or Replace the Air Filter?

  • After every muddy or dusty ride, clean the filter before storing your bike.
  • Inspect after every ride; replace frequently if you ride in extra dusty, sandy, or wet conditions.
  • Replace at minimum once per season (or more with heavy use) to guarantee optimal protection.

Model–Specific Notes for 2020 Sherco 300SEFFAC

  • The factory airbox design is built for fast filter swaps. Use OE filters for ideal sealing – aftermarket products should specify fitment for your exact model and year.
  • Be cautious with performance mods that might affect air flow; always ensure upgrades do not compromise air filtration.
  • Never run your engine without the filter securely installed—the Sherco's high-compression engine is sensitive to small particles.

Routine air filter care is the best way to preserve your 2020 Sherco 300SEFFAC’s performance and longevity. Always use properly fitted filters and quality filter oil, and check continuously for correct seating and airbox cleanliness.

Related Shopping Categories

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Shop Intake Parts for a 2020 Sherco 300SEFFAC 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.