Air Filter Cleaning – Replacement Guide for 2025 GAS GAS EX350F

Shop parts for a 2025 GAS GAS EX350F Dirt Bike.

The 2025 GAS GAS EX350F boasts impressive engineering updates, including a reinforced one-piece air intake, making air filter service faster and more reliable than ever before. Keeping your air filter clean and in top condition is essential to protect your powerful 350cc engine, ensuring optimal performance whether you're hitting cross-country tracks or challenging terrain.

Why Air Filter Care Is Critical for the 2025 GAS GAS EX350F

  • Engine Protection: Clean air is crucial for combustion and engine longevity. A dirty or clogged filter restricts airflow, reduces power, and increases engine wear.
  • Performance: The EX350F's high-performance EFI system and central intake benefit from maximum airflow, which only a clean filter can provide.
  • Easy Access: Thanks to GAS GAS's side panel design, you can access the airbox and filter by simply removing the left panel–no tools needed for the panel itself.

How to Remove the Air Filter: EX350F’s Fast Service Feature

  1. Place the bike on a stand and ensure the engine is cool.
  2. Pop off the left side panel of the bike by hand to expose the airbox.
  3. Remove the air filter cage and filter by releasing the retaining tab.
  4. Inspect the filter for excessive dirt, damage, or signs of breakdown.

Cleaning the Air Filter

  1. Gently tap the filter to dislodge loose debris.
  2. Use a quality foam filter cleaner compatible with dual-stage filters. Avoid gasoline or harsh solvents.
  3. Thoroughly rinse with clean water. Repeat cleaning if dirt remains.
  4. Allow the filter to dry completely, away from heat sources.
  5. Once dry, apply air filter oil evenly throughout the foam. Don’t over-oil, but ensure all surfaces are protected.
  6. Inspect all seams, especially near the sealing ring and bonded foam layers. The 2025 EX350F supports filters with a thick, flat greaseless sealing ring for airtight fitment.

Installing the Air Filter

  1. Check that the airbox is free of dirt or water. Wipe as needed.
  2. Seat the filter on the support cage, ensuring proper alignment.
  3. Push the filter assembly into place, making sure the sealing ring contacts the airbox evenly.
  4. Secure the retaining tab.
  5. Reinstall the left side panel by snapping it back onto the frame.

When to Replace the Air Filter

  • Replace your air filter if the foam is torn, split, won't clean thoroughly, or if glue seams show signs of breakdown.
  • Twin Air and similar filters for 2025 GAS GAS models feature two layers of open-pore foam, bonded for durability and superior filtration. These filters can withstand repeated cleanings if maintained properly.

Special Considerations Unique to the 2025 GAS GAS EX350F

  • The new one-piece air intake maximizes airflow and simplifies filter installation, reducing the chance of misalignment or leaks.
  • The tool-free airbox access dramatically speeds up cleaning or replacement, helping you maintain top engine performance even between motos.
  • GAS GAS designed the seal and cage to work with thick, flat foam rings, so always use filters designed specifically for 2022–2025 EX350F models.

Pro Tips for Longer Filter Life & Engine Health

  • Always keep a spare pre-oiled filter ready for quick swaps on long rides or race days.
  • Inspect and service your filter after every particularly dusty or muddy ride.
  • Use only high-quality filter oil and avoid wringing or harsh wringing actions to prevent foam damage.
  • Seal the airbox with an airbox cover when washing your bike to prevent water from entering.

Regular filter maintenance is the key to sustained power and reliability from your 2025 GAS GAS EX350F. Following this MotoSport proprietary guide will keep your engine protected, no matter how demanding your riding conditions.

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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.