Air Filter Cleaning & Replacement Guide for 2015 Kawasaki KX100

Shop parts for a 2015 Kawasaki KX100 Dirt Bike.

Maintaining peak performance on your 2015 Kawasaki KX100 starts with proper air filter care. The KX100 uses a dual-stage foam air filter designed for optimal airflow and filtration–crucial for the rigors of two-stroke racing and off-road riding. Here—exclusively for MotoSport.com customers—is your step-by-step guide to cleaning, inspecting, and replacing the air filter, along with specific tips for your bike's model year.

Tools & Supplies Needed

  • Cleaning solvent (safe for foam)
  • Foam filter-specific oil
  • Warm, soapy water
  • Latex or nitrile gloves
  • Clean lint-free rags or paper towels
  • 8mm socket or wrench

Removing the Air Filter

  • Locate the seat bolts (8mm) at the rear of the seat. Remove both bolts.
  • Lift off the seat to expose the airbox.
  • Undo the wing nut securing the air filter cage.
  • Carefully pull out the filter assembly. Take care not to knock dirt into the intake tract–best practice is to place a clean rag in the throat while servicing the filter.

Cleaning Procedure

  • Inspect the foam immediately for tears, brittle spots, or loose glue. Discard and replace if damaged—don't risk engine contamination.
  • Pre-clean: Gently tap and brush off excess dirt outside the airbox.
  • Apply cleaning solvent to saturate the foam (avoid wringing or twisting, which can harm the filter's structure).
  • Squeeze through the foam repeatedly to flush contaminants.
  • Wash the filter in warm, soapy water. Again, gently squeeze; do not wring. Rinse thoroughly to remove all soap&cleaning residue.
  • Allow to air-dry completely in a dust-free space–do not use compressed air or heat sources.

Oiling the Filter

  • Once dry, soak with foam air filter oil, ensuring complete saturation–work oil into all foam surfaces.
  • Massage gently to evenly distribute oil, but avoid over-oiling, which can restrict airflow.
  • Optional: Apply high-temp grease lightly around the sealing rim for increased dust protection, especially when riding in harsh, sandy conditions.

Reinstallation

  • Remove the rag from the intake.
  • Ensure the plastic filter cage aligns properly with the filter's center opening.
  • Reinstall onto the airbox stud and secure with the wing nut–filter should seal tightly, with no visible gaps.
  • Inspect airbox area for remaining dirt. Wipe clean as necessary.
  • Bolt the seat back in place.

Replacement Interval & Pro Tips for KX100 Owners

  • The KX100's high-revving two-stroke engine demands frequent filter service. Clean after every ride in dusty or sandy conditions, and at minimum, every 2-3 rides elsewhere.
  • Inspect your filter before cleaning–if foam feels brittle or glue starts failing, replace it. Most foam filters last for up to ten cleanings under normal use before needing replacement.
  • Twin Air and other premium filters for the KX100 feature dual-layer open-pore foam for superior protection and airflow, tested to maintain power and longevity.
  • Use only oils & solvents intended for foam air filters, avoiding aggressive cleaners that might damage filter structure.

2015 Kawasaki KX100 Owner Notes

  • Unique to the KX100 is its compact airbox design—be extra careful not to drop dirt or debris into the intake during removal and cleaning.
  • Always inspect the sealing surface for nicks or warping–even small leaks allow dust into the engine, risking costly damage.
  • The two-stroke engine's output is sensitive to airflow restrictions—a well-maintained air filter helps preserve throttle response and engine longevity.

With proper air filter care, your 2015 Kawasaki KX100 delivers championship-worthy reliability on every ride. For replacement filters, cleaning kits, and all model-specific components, MotoSport.com is your trusted source.

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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.