Air Filter Cleaning – Replacement Guide for 2014 GAS GAS TXT-Racing-300

Shop parts for a 2014 GAS GAS TXT-Racing-300 Dirt Bike.

Maintaining your 2014 GAS GAS TXT-Racing-300 is essential for peak performance – and air filter upkeep stands at the core of reliability. The TXT-Racing-300 uses a dual-layer foam filter design, typically produced by Twin Air, fitting models from 2002 up to 2022. This model offers one of the easiest airbox access methods among trials bikes: removal is quick and tool-free, and the filter service can be completed in minutes.

Unique Features of Gas Gas TXT-Racing-300 (2014)

  • The airbox is engineered for easy access. Four flexible posts hold the rear fender in place; you simply pull up and away, revealing the air filter for rapid inspection and cleaning.
  • An integrated mud flap inside the airbox helps shield the filter from debris. Do not remove this, as it is crucial for protecting the filter and your engine from fouling.
  • The filter's dual-layer foam construction provides superior particle trapping, with minimized seams for longevity.

Before You Begin

  • Have a clean workspace, motorcycle stand, and correct cleaning materials (foam filter cleaner, water, air filter oil).
  • Consider buying a spare filter from a reputable brand (OEM replacement is Twin Air).

Step-by-Step Cleaning Instructions

  1. Remove the filter: Unclip and take off the rear fender by releasing the four posts. The airbox and filter become immediately accessible.
  2. Inspect and detach: Gently twist counterclockwise on the filter securing tab and carefully withdraw the filter. Avoid removing the mud flap.
  3. Pre-clean: Lightly tap or shake the filter to remove loose debris. Take note of any excessive coarse dirt—regular cleaning ensures longevity and optimal air flow.
  4. Wash: Rinse the foam filter with a dedicated foam filter cleaner, then water. Never use gasoline or harsh chemicals that degrade foam cell structure.
  5. Dry: Pat gently with a lint-free towel, then let air dry completely.
  6. Oil: Evenly coat with air filter oil. Squeeze (not wring) to distribute. Avoid pooling or dry patches.
  7. Reinstall: Slide the filter into place, snapping in the tab until secure. Refit the fender with the posts until locked.

Replacement Best Practices

  • Replace the filter every season, or more often if riding in dusty conditions. Most riders reuse the foam filter up to 15 times with proper maintenance.
  • Inspect seams and cell uniformity—if you notice deterioration or holes, replace immediately.
  • Only use dual-layer foam filters designed for trials riding; avoid generic or single-layer substitutions for best dust protection.

Owner Tips for TXT-Racing-300

  • Always ensure the airbox seal and mud flap are intact after reassembly—these prevent water and grit from reaching the engine.
  • Routine filter maintenance should be performed nearly every ride in summer for optimal engine life and throttle response.

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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.