Air Filter Cleaning – Replacement Guide for 2017 Yamaha WR450F

Shop parts for a 2017 Yamaha WR450F Dirt Bike.

Keeping the air filter on your 2017 Yamaha WR450F clean and properly maintained is critical to engine performance and longevity. Dust, dirt, and debris are constant threats when riding off-road, especially for a high-output machine like the WR450F. This exclusive MotoSport.com guide provides proven methods to keep your bike breathing strong and performing at its peak.

Why Air Filter Maintenance Matters

The WR450F's high-performance engine depends on a clean air supply for optimal combustion. A clogged or dirty air filter restricts airflow – reducing power, causing poor fuel efficiency, and increasing engine wear due to contaminants. Yamaha's foam filter, when properly serviced, strikes a balance between airflow and filtration – but only if it is kept in top condition.

What You'll Need

  • Rubber gloves (foam filter oils and cleaners can irritate skin)
  • Foam air filter cleaner or a kerosene-based cleaning solution
  • Bucket (at least one gallon size)
  • Warm water
  • Foam filter oil (high-tack, not aerosol spray)
  • Lint-free rags
  • Contact cleaner (for the airbox sealing surface)
  • Grease (lithium soap-based recommended for sealing edges)

How To: Remove the Air Filter

  1. Remove the seat – the WR450F's air filter is accessed beneath it.
  2. Wipe any loose dirt from around the airbox to prevent debris from falling inside.
  3. Release the air filter retaining clip and gently lift out the filter. Take care not to drop dust into the throttle body or intake tract.

Cleaning the Air Filter

  1. Carefully separate the foam filter from its plastic cage.
  2. Submerge the dirty filter in a bucket of cleaning solution. Work the filter gently to release trapped dirt. Avoid wringing or twisting – this can tear the delicate foam.
  3. Rinse thoroughly in clean, warm water. Inspect for tears, holes, or degradation. If any are present, replace the filter immediately to avoid engine damage.
  4. Let the filter air-dry completely – do not use compressed air or high heat, which can damage the foam.

Oiling and Reinstalling

  1. Once dry, thoroughly coat the filter with foam air filter oil. Massage the oil through all surfaces for uniform coverage.
  2. If using bottle oil (recommended over aerosol), pour a small amount and work it in with your gloved hands. Ensure no sections are left dry or oversaturated.
  3. Work a thin layer of grease around the filter's sealing surface for an airtight fit in the airbox.
  4. Carefully reinstall the air filter on its cage and position it within the airbox. Secure the retaining clip. Replace the seat and check for proper fitment.

How Often Should You Clean or Replace?

  • Clean: After every 1-3 rides in dusty or muddy conditions (more often if severe).
  • Inspect for damage or tears: Every cleaning. Replace as soon as any foam defects appear.
  • Replace: When cleaning fails to restore foam suppleness, or if the filter is punctured or excessively degraded.

Special Notes for the 2017 Yamaha WR450F

  • The 2017 WR450F uses a robust twin-layer foam filter designed for the demands of enduro and trail use.
  • The air filter is positioned high in the frame to help prevent water and mud ingestion – but routine maintenance is still critical, especially after crossing water or riding in silt-heavy terrain.
  • If your WR450F is fitted with aftermarket tanks or mods (such as the 15L Safari Tank), check for access differences or interference that could affect filter installation or sealing.
  • Using a filter skin or pre-filter is a helpful upgrade for dusty events, extending cleaning intervals, but never replace regular foam servicing.

MotoSport Tips

  • Keep a spare, clean, and pre-oiled air filter ready to swap at home or track for quick changes.
  • Use only dedicated foam filter oil for maximum particle trapping and long-term foam health. Avoid engine or motor oil for this application.
  • Dispose of used solvents and oils responsibly.

Regular air filter care is a hallmark of a WR450F owner who wants max performance and engine life. For all genuine Yamaha filters, oils, cleaners, and riding essentials-shop parts for your ride now at MotoSport.com.

Related Shopping Categories

Shop Air Filters for a 2017 Yamaha WR450F Dirt Bike.

Shop Air Filter Oil for a 2017 Yamaha WR450F Dirt Bike.

Shop Air Box Covers for a 2017 Yamaha WR450F Dirt Bike.

Shop Tools for a 2017 Yamaha WR450F Dirt Bike.

Shop Intake Parts for a 2017 Yamaha WR450F 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.