Air Filter Cleaning – Replacement Guide for 2013 GAS GAS TXT-PRO-250

Shop parts for a 2013 GAS GAS TXT-PRO-250 Dirt Bike.

The 2013 GAS GAS TXT-PRO-250 is a championship-winning trials bike, renowned for its agile handling and responsive two-stroke engine. Keeping the air filter clean – and replacing it as needed – is essential for peak performance and engine longevity. This guide from MotoSport is tailored for the unique needs of your TXT-PRO-250.

Why Air Filter Maintenance Matters

Trial bikes like the TXT-PRO-250 frequently tackle dusty, dirty environments. A clogged or damaged air filter restricts airflow and increases engine wear, decreasing throttle response and risking internal damage. GAS GAS recommends cleaning the air filter after every race, ride, or whenever it gets dirty.

Tools & Supplies Needed

  • Replacement air filter (if required)
  • Air filter-specific cleaning solvent or mild detergent
  • Bucket & clean water
  • Air filter oil
  • Rubber gloves
  • Clean rags or paper towels
  • 8mm – 10mm socket or T-handle (for filter access panel)

Step-by-Step: Air Filter Removal

  1. Ensure the bike is upright on a stand, engine off and cool.
  2. Remove the seat and, if needed, the side panel to access the air box. On the 2013 TXT-PRO-250, this requires removing a few bolts securing the panel.
  3. Carefully detach the air filter from the airbox mounting flange. Inspect for excess dirt or damage.

Cleaning Procedure

  1. Tap the filter gently to remove loose dust and debris.
  2. Immerse the filter in a bucket of warm, soapy water (use a filter-specific cleaner or mild detergent – avoid gasoline.). Squeeze gently to work out dirt. Repeat with fresh rinse water until water runs clear.
  3. Let the filter air dry completely. Do not use compressed air or heat sources.
  4. Inspect for any tears, hardened foam, or separation at seams. Replace immediately if any damage is present.

Oiling & Reinstallation

  1. Evenly coat the dry filter with foam air filter oil. Massage oil through the foam so every part is uniformly tacky, but do not oversaturate.
  2. Wipe excess oil from the mounting surface and filter base to ensure a tight seal in the airbox.
  3. Reinstall the filter onto the flange, ensuring a snug, gap-free fit. Secure the airbox cover and replace the seat and any panels removed.

Replacement Interval & Pro Tips

  • Check and clean the air filter after every ride, especially in very dusty conditions.
  • Always keep a spare, pre-oiled filter ready for quick swaps on riding days.
  • If the filter foam shows signs of breakdown or doesn't spring back after cleaning, replace immediately.
  • Inspect the airbox for dirt or water – a dirty airbox usually means the filter seal was compromised.
  • Never run the TXT-PRO-250 without a properly oiled filter in place.

Model-Specific Notes for the 2013 GAS GAS TXT-PRO-250

  • This model uses a foam air filter, designed for repeated cleaning and re-oiling.
  • The airbox uses a direct fitment system – always check that the filter base is seated completely around the intake flange before closing.
  • Factory maintenance schedules recommend checking the filter every race; this is a minimum – frequent maintenance extends engine life.
  • When riding in streams or rainy conditions, check the air filter and airbox for water intrusion upon return.

Caring for the air filter on your 2013 GAS GAS TXT-PRO-250 is a straightforward job that pays off with more power, better reliability, and a longer-lasting engine. For OEM and performance replacement parts, rely on MotoSport to supply everything you need for flawless maintenance—on and off the trail.

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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.