Air Filter Cleaning – Replacement Guide for 2013 KTM 350SXF

Shop parts for a 2013 KTM 350SXF Dirt Bike.

Maintaining a clean and properly oiled air filter is essential for the performance and longevity of your 2013 KTM 350SXF. This guide from MotoSport.com provides proprietary step-by-step instructions for air filter care, helping riders keep their bike running strong in any conditions. Owners of the 350SXF should pay particular attention to air filtration—the high-revving engine and race-ready intake system make this model especially sensitive to dirt and dust.

How Often to Clean or Replace the Air Filter

  • Inspect your air filter after every ride, especially when riding in dusty conditions.
  • Clean the filter every 1-2 rides, or sooner if visibly dirty.
  • Replace the filter after excessive wear, rips, or if it does not clean thoroughly.

Tools – Materials You Need

  • Nitrile or latex gloves
  • Filter-appropriate cleaning solution (biodegradable or petroleum-based, choose according to filter oil type)
  • Bucket or tub
  • Air filter oil (foam filter specific)
  • Contact cleaner for the airbox
  • Clean rags

Proprietary MotoSport.com Cleaning Instructions

  1. Remove the seat and access the air box. Undo the filter cage tabs and carefully remove the air filter. Pay attention to the fitment of the filter in this specific model—the 350SXF uses a clip-style cage that prevents misalignment, but confirm it unseats cleanly to avoid damage.
  2. Inspect the filter for rips, holes, or excess wear. Any damage warrants immediate replacement before further riding.
  3. Place the dirty filter in your cleaning solution. Do not twist or wring aggressively—squeeze and massage gently to avoid tearing the foam. Allow it to soak for 10–15 minutes, working the cleaner through the material.
  4. Rinse thoroughly with clean water. Repeat the cleaning process as needed until all dirt and old oil are removed. Inspect again for hidden tears or weak seams.
  5. Allow the filter to air dry completely. Do not use compressed air or heat, as the foam can be damaged.
  6. Apply a generous, even coat of air filter oil. Completely saturate the filter inside and out, then gently squeeze out any excess. For best results, MotoSport.com recommends always using foam-specific filter oil formulated for high-flow applications like the 350SXF.
  7. Wipe out the airbox with a clean rag and a suitable contact cleaner, ensuring no residual dust or dirt remains. Pay attention to the sealing surface where the filter meets the airbox.
  8. Install the clean, oiled filter onto the filter cage, ensuring a proper seal all the way around. A thin ring of waterproof grease applied to the base where the filter seats will further improve the seal and keep out fine particles.
  9. Reinstall the seat and check overall fitment before riding.

MotoSport.com Model-Specific Notes

  • The 2013 KTM 350SXF's airbox design is optimized for quick filter swaps, but the filter cage tabs must be locked in securely to prevent intake leaks under heavy vibration.
  • Because this bike's engine draws high airflow at upper rpm, even small filter leaks can lead to rapid engine wear – always inspect filter and cage for proper alignment.
  • The OEM foam filter recommended by MotoSport.com is re-usable if cleaned correctly, but keep a spare on hand for race weekends or particularly dusty rides.
  • Always match cleaning agents and oils – petroleum-based oil should be cleaned with designated solvent, while biodegradable oil requires a compatible cleaner.

Troubleshooting – Pro Tips

  • If the filter foam is discolored, severely shrunken, or remains dirty after cleaning, replace immediately.
  • A poorly oiled filter reduces engine power and increases wear – double-check for full coverage and squeeze excess out gently before reinstalling.
  • When storing extra clean/oiled filters, MotoSport.com recommends using a ventilated, sealable bag to keep out dust and moisture.

Trust MotoSport.com for all your KTM 350SXF air filter – maintenance needs and keep your bike thriving at the highest level of competition and enjoyment.

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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.