Air Filter Cleaning – Replacement Guide for 2018 KTM 150XCW

Shop parts for a 2018 KTM 150XCW Dirt Bike.

Owning a 2018 KTM 150XCW means enjoying a lightweight, high-performance 2-stroke built for versatility on trails and enduro. Keeping the air filter in flawless condition is crucial to maintaining peak horsepower, throttle response, and engine longevity. This guide from MotoSport covers all key steps and model-specific tips for cleaning and replacing your air filter.

Why Air Filter Maintenance is Critical for the 2018 KTM 150XCW

  • Two-stroke sensitivity: The 150XCW's two-stroke motor demands excellent filtration to prevent premature engine wear caused by dust and debris.
  • High air volume requirement: For optimal combustion and performance, this bike relies on an unobstructed, clean filter, especially when ridden hard.
  • Frequent off-road exposure: Typical riding conditions for the XCW mean more frequent cleaning compared to street or dual-sport bikes.

Recommended Filter: 2018 KTM 150XCW

  • Uses OEM filter 79006015000 or aftermarket equivalents with dual-layer foam for maximum protection and airflow.
  • Compatible with pre-oiled and dry foam filters described for 2017–2018 KTM models.

How Often to Clean or Replace the Air Filter

  • Check at least every 30 minutes of hard riding, or at the end of each ride if in dusty or muddy conditions .
  • Replace if the filter shows tears, permanent dirt staining, or deterioration after cleaning.

Step-by-Step Cleaning – Replacement Instructions

  1. Remove the seat
    Use the release lever at the rear and lift the seat off .
  2. Access the air filter
    Unlatch and remove the air filter box cover. The 150XCW uses quick-release tabs for tool-less access to the filter .
  3. Remove the air filter
    Gently pull the filter frame and element back and out from the intake boot, avoiding debris falling into the intake .
  4. Inspect the filter
    Replace if there are any tears or if it's hard and brittle. Otherwise, proceed to clean.
  5. Clean the filter
    • Tap gently to remove loose dirt, avoiding rough handling.
    • Submerge in air filter-specific cleaner or mild solvent, kneading and squeezing (never twisting) until dirt is out.
    • Rinse in clean water. Repeat if necessary.
    • Dry thoroughly – allow to air-dry in a dust-free environment.
  6. Oil the filter
    • Use quality foam air filter oil. Work it in until the entire filter is evenly coated but not saturated.
    • For best results, wear gloves and massage oil throughout all foam layers.
    • Squeeze out excess – the foam should be tacky, not dripping.
  7. Check the airbox and seal
    Wipe clean the airbox, especially the sealing surface, and check the filter cage and rim for damage. Ensure a debris-free, correct seal to prevent unfiltered air ingress .
  8. Install the filter
    Carefully refit the oiled filter and seal along the airbox rim. Confirm secure attachment of the filter frame to avoid leaks .
  9. Replace the cover and seat
    Install the airbox cover, refasten seat, and confirm a snug fit .

Pro Tips for the 2018 KTM 150XCW Owner

  • Carry a spare pre-oiled filter for quick swaps on rides with heavy dust or mud.
  • Seal the filter rim with a high-quality sealing grease to block fine dust, especially for extended or race events .
  • Inspect filter cage clip and mounting tab – unique to the 2018 KTM design – for wear so the filter always seats correctly.
  • Never run the engine with the filter removed or poorly sealed. The 150XCW's high-revving nature makes it especially vulnerable to intake contamination.

When to Replace the Filter

  • When the foam is no longer pliable or the glue joints or seams show signs of coming apart.
  • If you notice unexplained power loss or increased fuel consumption after routine cleaning.

Final Note

Diligent air filter maintenance ensures your 2018 KTM 150XCW delivers maximum power and reliability, whether attacking singletrack or racing enduro. For OEM and premium aftermarket filters plus cleaning supplies tailored for your bike, rely on MotoSport.com to keep your ride ready for any challenge.

Related Shopping Categories

Shop Air Filters for a 2018 KTM 150XCW Dirt Bike.

Shop Air Filter Oil for a 2018 KTM 150XCW Dirt Bike.

Shop Air Box Covers for a 2018 KTM 150XCW Dirt Bike.

Shop Tools for a 2018 KTM 150XCW Dirt Bike.

Shop Intake Parts for a 2018 KTM 150XCW Dirt Bike.

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.