Air Filter Cleaning – Replacement Guide for 2018 Kawasaki KX100

Shop parts for a 2018 Kawasaki KX100 Dirt Bike.

Keeping your 2018 Kawasaki KX100 performing at its peak means routine air filter maintenance. The KX100 features a sturdy, easy-to-access air box design, making cleaning & replacing your filter straightforward and crucial for optimal engine health. Neglecting air filtration on this small-bore two-stroke can lead to costly engine damage or performance loss, so regular service is a must for every MotoSport.com rider.

Tools – Materials Needed

  • 8mm socket or T-handle
  • Clean rags
  • Gloves
  • Foam filter cleaner & approved air filter oil
  • Mild detergent
  • Bucket or sink access

Removing the Air Filter

  • Use the 8mm socket to remove the two seat bolts at the rear of the seat.
  • Lift the seat off to expose the air box.
  • Unscrew the wing nut at the center of the air filter cage.
  • Gently remove the filter and cage assembly from the air box. Take care not to drop debris into the intake.

Cleaning the Filter

  • Pre-clean by tapping the filter to knock loose the bulk of the dirt.
  • Work in filter cleaner, massaging gently. Avoid wringing or pulling the foam – this can tear it.
  • Rinse with water, then wash with mild detergent and water to remove all dirt and cleaner residue.
  • Rinse thoroughly. Squeeze (do not twist) to expel excess water.
  • Let the filter air dry completely – do not use compressed air or heat sources which can damage the foam.

Oiling – Reinstalling

  • Work foam filter oil evenly through the filter. Coverage must be thorough. Oiled foam traps fine dust before it enters your engine.
  • Wipe off excess oil with a paper towel, ensuring it is not dripping but fully saturated.
  • Inspect the sealing edge of the filter and apply a light coat of waterproof grease for a perfect seal, especially if you ride in extra dusty or muddy conditions.
  • Fit the clean, oiled filter over the cage, align it in the air box, and secure with the wing nut.
  • Double-check for a snug fit – no gaps where dirt can bypass the filter.
  • Reinstall the seat using the 8mm bolts.

Replacement Intervals – Model-Specific Tips

  • Clean your filter after every dusty or wet ride. On the powerful revving KX100, even short rides can clog the filter quickly.
  • Replace the filter if you find holes, tears, or broken seams. Always keep a spare ready so time off the track is minimized.
  • Be cautious with reinstallation. The filter cage bolt is plastic – avoid overtightening, which can strip threads or crack components.
  • Inspect the air box for dirt intrusion each time. The 2018 KX100 shares its basic design with smaller KX models so the process is familiar, but its power output means a clogged filter is extra risky.
  • Always check for proper air box sealing, as moisture or sand intrusion is the main engine-killer on 85/100cc two-strokes.

Final Thoughts

The 2018 Kawasaki KX100 rewards consistent filter care by delivering max output and reliability for every MotoSport.com rider. Grab fresh OEM or performance air filters, premium oil, and everything else you need for your KX100 from our exclusive lineup.

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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.