Air Filter Cleaning – Replacement Guide for 2015 GAS GAS TXT-PRO-300

Shop parts for a 2015 GAS GAS TXT-PRO-300 Dirt Bike.

Keeping the air filter on your 2015 GAS GAS TXT-PRO-300 clean is critical for maintaining optimal engine performance, especially given the dusty conditions typical for trial riding. Regular air filter care prevents dirt and debris from reaching the engine, enhancing throttle response and prolonging engine life.

Why Air Filter Maintenance is Crucial for the 2015 TXT-PRO-300

The 2015 GAS GAS TXT-PRO-300 features a high-performance two-stroke engine designed for low-speed trial precision and intense competition. Its air filter is positioned higher in the frame to help avoid water and debris ingress, but the open frame and exposed filter box mean frequent cleaning is essential – particularly after every race or ride in dusty conditions. Neglecting filter maintenance leads to restricted airflow, reduced power, and possible engine damage.

How Often Should You Clean or Replace the Air Filter?

  • Clean the air filter after every outing, especially after dusty or wet rides
  • Replace the air filter if it is damaged, excessively worn, or no longer seals properly

Periodic checks are crucial for high-performance models like the TXT-PRO-300, as trial events often involve water crossings and heavy debris.

Step-by-Step: Removing, Cleaning & Replacing the Air Filter

  1. Access the Air Filter Box
    Remove the seat and side panel to access the air filter box. On the TXT-PRO-300, remove the quick-release fastener or bolts to open the airbox cover.
  2. Remove the Air Filter
    Gently pull the filter away from its mounting. Note its orientation for proper reinstallation.
  3. Inspect the Filter
    Check for tears, worn foam, or signs of deterioration. Replace if damaged.
  4. Clean the Filter
    Wash the foam filter element in a dedicated filter cleaner or mild soap and warm water.
    Rinse thoroughly and squeeze out excess water (do not wring).
    Allow the filter to dry completely.
  5. Oil the Filter
    Apply a high-quality foam air filter oil. Massage the oil into the foam to ensure even coverage.
    Squeeze out excess oil.
  6. Clean the Air Filter Box
    Wipe out the airbox with a clean, damp rag. Inspect for any debris that might enter the engine.
  7. Reinstall the Filter
    Carefully place the filter back in the airbox, ensuring a complete seal around the rim.
    Check fitment closely—the TXT-PRO-300 has precise tolerances and leaks will compromise engine health.
  8. Reassemble the Air Box Cover
    Secure it fully to avoid any gaps or misalignment.

Special Notes for TXT-PRO-300 Owners

  • Pay close attention to the airbox sealing surface. The 2015 TXT-PRO-300's filter mounting is performance-focused, so even small leaks can introduce harmful contaminants.
  • Always use filter oils and cleaning agents designed for foam elements—other chemicals may damage the filter.
  • Inspect the intake tract for water or dust after extreme rides. This model's intake design, while high-mounted, can be susceptible during wet trials sections.

Additional Maintenance Tips

  • Store spare, pre-oiled filters in clean, sealed bags for fast swaps on event or ride days.
  • Replace the filter every season or whenever it no longer fits tightly in place.
  • Check the airbox breather and drain for clogs when cleaning the filter.

Adhering to this guide ensures peak engine health and top-tier performance from your TXT-PRO-300, meeting the demands of any ride or competitive event.

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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.