Air Filter Cleaning & Replacement Guide for 2013 GAS GAS EC300R

Shop parts for a 2013 GAS GAS EC300R Dirt Bike.

The 2013 GAS GAS EC300R is a legendary 2-stroke enduro machine praised for performance – but a properly maintained air filter is essential for crisp response, long engine life, and optimal power. This model uses a single-bolt seat removal design, so accessing the air filter is quick. However, the unique airbox design presents a few challenges and requires attention to detail.

What EC300R Owners Need to Know

  • Challenging Airbox Design: The 2013 EC300R airbox is known for its tighter fit, corners that trap dirt, and an awkward filter cavity. Owners report the filter sits against the back wall and is not as easy to remove or re-seat as on other models. There's also an open side panel viewing hole and a bottom rubber drain hose that easily clogs. Take your time to prevent dirt from entering the intake when handling the filter.
  • Cage Upgrade Recommended: The original plastic filter cage may bow over time due to spring pressure, compromising the seal. Many owners upgrade to a more robust billet aluminum cage for a better seal and longer life.
  • Easy Access: Removal starts by loosening a single fastener at the top of the saddle for seat removal – no tools needed underneath.

How to Clean or Replace Your EC300R Air Filter

  1. Remove the Seat: Loosen the fastener located at the top rear of the seat. Lift the saddle off to access the airbox.
  2. Remove Air Filter: Carefully pull the filter and cage from the airbox. Work gently to avoid dislodging dirt into the intake tract, since the fit is snug and corners are dirt-prone.
  3. Inspect and Pre-Clean: Check the filter for major dirt or damage. Tap gently to remove loose debris. If the cage is the original plastic unit, inspect for any bowing or distortion. Replace if needed to maintain air-tight sealing.
  4. Wash the Filter: Use a proper filter cleaner or mild detergent in warm water. Avoid gasoline or harsh solvents, which degrade filter foam. Rinse thoroughly until water runs clear.
  5. Dry Completely: Allow the filter to fully air dry. Do not use compressed air or a heat source, as this can damage the foam.
  6. Oil the Filter: Apply high-quality foam air filter oil, working it through the entire filter to ensure complete coverage. Do not over-oil, but every pore should have oil to trap dust.
  7. Reinstall on Cage: If using an upgraded billet cage, check the fit and ensure the filter sits evenly and seals completely. With any cage, verify the spring and mounting points are intact.
  8. Install Filter – Inspect Airbox: Wipe out the airbox. Keep dirt out. Install the filter & cage assembly, making sure edges seal flush all around the contact area.
  9. Check Drain Hose: Inspect the bottom drain hose for blockages and clear as needed. This hose is notorious for clogging on the EC300R and can hold water or debris.
  10. Reinstall Seat: Refit the saddle and secure with the fastener. Be sure the seat is correctly seated to prevent airbox leaks.

Replacement Filters & Specs

  • Compatible foam filters from leading brands (see MotoSport offerings).
  • Flame-retardant options are available for extra protection.
  • Inspect and replace filter if there are tears, severe dirt, or poor fit. Always carry a spare for dusty rides.

Pro Tips for 2013 GAS GAS EC300R Owners

  • Upgrading to a billet filter cage can improve seal and ease of filter install/removal.
  • Pay special attention when cleaning the tight airbox corners.
  • Check the drain hose every ride to avoid water or mud buildup.

With regular filter maintenance, your 2013 GAS GAS EC300R will run strong and stay protected from the harshest riding conditions. Quality parts and detailed maintenance are always available at MotoSport, your trusted source for everything dirt bike.

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Shop Intake Parts for a 2013 GAS GAS EC300R 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.