Air Filter Cleaning – Replacement Guide for 2017 Kawasaki KX85

Shop parts for a 2017 Kawasaki KX85 Dirt Bike.

Maintaining the air filter is one of the most crucial steps to keep your 2017 Kawasaki KX85 performing at its best. The KX85 uses a foam air filter design, which ensures excellent dirt-trapping capability when properly maintained. Frequent cleaning and routine replacement are essential, particularly if you ride in dusty or muddy conditions. Below is your comprehensive MotoSport-exclusive guide for both cleaning and replacing the air filter on your 2017 KX85.

Why Regular Air Filter Maintenance Matters on the KX85

  • Optimal engine performance – The KX85's high-revving 2-stroke needs a clean, unrestricted air supply to deliver peak power.
  • Engine longevity – Dirt and dust sucked into the intake rapidly wear down piston rings and cylinder walls. A well-maintained filter is your first line of defense.
  • Avoiding carburetor issues – The KX85's carburetor is sensitive to debris, so filter neglect can lead to starting and running problems.

How to Remove the KX85 Air Filter

  1. Use an 8mm socket to remove the two seat bolts at the rear of the seat.
  2. Lift the seat off to access the airbox.
  3. Locate the air filter wing nut in the center. Carefully unscrew and set the wing nut aside.
  4. Gently pull the filter and its cage out. Be cautious not to let dirt on the surface fall into the intake tract.

Note: Always inspect the area around the air filter. If you see dirt in the airbox, carefully wipe it out before removing the filter to prevent debris entering the motor. Never use high-pressure air or water in the airbox.

Cleaning the Foam Air Filter

  1. Remove the filter from its cage.
  2. Fill a bucket with warm, soapy water designed for foam filters. Gently massage the filter to remove dirt.
  3. Rinse with clean water and squeeze (don't wring) out excess moisture.
  4. If using a filter oil solvent, wash out old filter oil thoroughly and repeat the soap and water wash.
  5. Let the filter dry completely before continuing.

Inspecting the Filter

  • Check for tears, degraded foam, or separated glue seams. Replace immediately if any damage is found.
  • If the foam has become stiff, brittle, or frequently sheds particles after repeated cleanings, install a new filter for maximum engine protection.

Oiling – Reinstalling the Air Filter

  1. Apply high-quality foam filter oil evenly throughout the filter. The filter must be well-saturated but not dripping.
  2. Work the oil into every nook of the foam. A properly oiled filter should feel tacky and pick up small debris easily.
  3. Reinstall the filter onto its cage, ensuring a snug fit.
  4. (Optional but advised) Apply a thin bead of waterproof grease around the sealing edge of the filter. This enhances the seal and is recommended especially for extra protection if you race or ride in heavy dust.
  5. Align the filter in the airbox, secure with the wing nut, and gently snug without overtightening.
  6. Replace the seat and fasten both seat bolts securely.

Replacement Tips – When to Swap out the KX85 Air Filter

  • Choose OEM or top-quality aftermarket filters engineered for the 2017 KX85 for proper fit and filtration.
  • Replace after every major race or very dusty/muddy outing – foam filters have a service life and shouldn't be reused indefinitely.
  • If you ride deep mud or sand, consider using a filter foam cover or screen for additional protection.

Special Notes for the 2017 Kawasaki KX85

  • The airbox on this generation KX85 is compact – always double-check sealing after installation and avoid overtightening the wing nut.
  • Some 2017 KX85 models may have a checkered history of air leaks if the filter isn't seated correctly. Greasing the sealing lips and ensuring proper alignment are extra important.
  • Carry a spare clean, pre-oiled filter when riding back-to-back motos for fast swaps and engine safety.

With proper air filter maintenance, your 2017 Kawasaki KX85 will continue performing at a factory-fresh level, race after race. Regular cleaning and timely replacement protect your favorite ride against premature engine wear and costly repairs. For all filter, cage, and airbox parts, MotoSport carries the exact components and cleaning products you need.

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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.