Air Filter Cleaning & Replacement Guide for 2019 Husqvarna FC350

Shop parts for a 2019 Husqvarna FC350 Dirt Bike.

Maintaining the air filter on your 2019 Husqvarna FC350 is crucial for peak performance, optimal engine life, and reliable off-road riding. The FC350 uses a high-flow foam air filter that is specifically designed for aggressive motocross and enduro conditions, making regular inspection and service essential.

Why Clean & Replace Your FC350's Air Filter?

  • Protection: The foam air filter keeps dirt, dust, and debris away from your engine, preventing premature wear.
  • Performance: A clogged filter restricts airflow, reducing power and throttle response.
  • Reliability: Properly maintained filters decrease the likelihood of engine failures and expensive rebuilds.

How Often Should You Service the Air Filter?

  • Check your air filter after every ride, especially in dry, dusty, or sandy conditions.
  • Clean or replace the air filter every 1-2 rides in harsh conditions, or at least every 5-10 hours of riding in milder terrain.
  • Always inspect after pressure-washing, heavy mud, or water crossings.

How to Remove the Air Filter

  1. Remove the seat by turning the seat bolt underneath the rear fender and lifting the seat up and back.
  2. Locate the air filter cage2019 FC350 uses a tool-free, quick-access air filter cage system.
  3. Release the mounting tab or clip and carefully slide the air filter and cage out as one piece. Take care not to knock loose dirt into the intake tract.

Cleaning the Foam Air Filter

  1. Gently separate the foam filter from its plastic cage. Inspect both for any signs of damage or excessive wear.
  2. TAP the filter to remove loose debris, then use a clean paper towel or brush to wipe off heavy dirt. Never wring the filter like a rag, as this can damage the foam and create micro-tears.
  3. Rinse the filter in a biodegradable filter cleaner or a gentle solvent suitable for foam filters. Some owners use kerosene or specialized filter cleanersavoid gasoline for safety and foam integrity. Immerse and squeeze gently to clean but never twist hard.*
  4. Wash next in warm, soapy water to remove oil and residual dirt. Rinse thoroughly. Repeat with a second water bath to ensure all cleaning agents and grit are removed.*
  5. Allow the filter to air dry naturally, away from direct sunlight or heat, which can degrade foam.

*Always use separate, clean containers for washing to avoid cross-contamination.

Oiling & Greasing the FC350 Air Filter

  1. Once dry, apply a high-quality foam air filter oil evenly throughout the filter. Knead gently to fully saturate all poresdo not oversaturate.
  2. Apply a bead of filter-specific grease around the sealing surface of the filter to ensure a dust-tight seal in the airbox. Some owners run oil alone, but grease further prevents fine dust ingress around the lip.*

*For the 2019 FC350, a properly greased seal is recommended due to its high-flow airbox design and the intense demands of motocross riding.

Reinstalling the Filter

  1. Inspect the airbox and intake for any remaining debris or signs of ingress. Wipe clean as needed.
  2. Seat the filter and cage assembly precisely in the airbox, ensuring the seal is fully engaged on all sides. Listen or feel for the click of the quick-release tab.
  3. Reinstall the seat and check that the filter is not pinched or misaligned.

When to Replace the Filter

  • Replace your FC350 air filter immediately if the foam is torn, brittle, permanently stained, or won't clean up properly. Relying on old or poorly cleaned foam risks engine dusting.
  • It's wise to keep a spare, pre-oiled filter ready for rapid swaps on race or ride day.

MotoSport Pro Tips for Husqvarna FC350 Owners

  • The 2019 FC350's simple tool-less airbox system makes filter checks and swaps fast & rider-friendly, even at the track.
  • Always block the throttle body or intake boot with a clean towel during cleaning to avoid accidental debris entry.
  • If you notice persistent dust traces inside the intake after filter maintenance, check for airbox seal leaks or replace worn filter cages promptly.
  • Invest in high-quality, model-specific filters and accessories for maximum protection and ease of maintenance.

Routine air filter care is the single best way to ensure your 2019 Husqvarna FC350 delivers reliable power and longevity, whether you're racing or trail riding.

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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.