Air Filter Cleaning & Replacement Guide for 2019 GAS GAS TXT Racing 300

Shop parts for a 2019 GAS GAS TXT Racing 300 Dirt Bike.

Maintaining the air filter on your 2019 GAS GAS TXT Racing 300 is essential for keeping your engine performing at its best, ensuring optimal airflow, and maximizing protection against dirt and debris. The TXT Racing 300 uses a Twin Air dual-stage foam filter housed in a cleverly designed airbox, allowing for quick and easy maintenance–thanks to its single-bolt access and convenient location for trials riding

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Why Air Filter Maintenance is Crucial for Your TXT Racing 300

  • Engine protection: A clean air filter maximizes filtration, preventing harmful particles from entering and damaging your engine.
  • Optimal performance: Restricted airflow from a dirty filter reduces engine power and throttle response.
  • Longevity: Regular cleaning and timely replacement decrease overall engine wear and extend the life of critical components.

Knowing Your 2019 GAS GAS TXT Racing 300 Air Filter

  • This model uses a dual-stage Twin Air foam filter with a coarse outer layer to catch larger debris and a fine inner layer to trap finer dust, both designed for superior airflow

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  • The filter is held in place by just one bolt, located for tool-free and hassle-free maintenance – a unique feature among trial bikes which often need quick service at the track

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Cleaning Your Air Filter

  1. Remove the seat and access the airbox by loosening the single securing bolt. Gently slide out the air filter.
  2. Check for damage: Examine the foam for tears or weak points. Do not reuse a damaged filter.
  3. Pre-clean: Tap the filter gently to remove loose dirt and debris. Do not twist or wring the foam.
  4. Wash: Soak the filter in a cleaning solution formulated for foam filters or a mild soap and warm water mixture. Squeeze gently until clean. Avoid harsh chemicals which can degrade the foam and adhesives.
  5. Rinse thoroughly until all soap is completely removed. Allow the filter to air dry completely–never use compressed air or heat, which could damage the foam.

Oiling the Air Filter

  1. Apply foam filter oil evenly once the filter is fully dry. Massage the oil into the foam to ensure every pore is coated but avoid oversaturation.
  2. Wipe off excess oil with a clean cloth for best airflow.
  3. Inspect the sealing surface and the airbox rim. Make sure both are clean and lightly oiled for a perfect dirt-tight seal when reinstalling.

Installing the Air Filter

  1. Place the freshly oiled filter back into the airbox, aligning carefully to ensure full coverage of the intake opening.
  2. Secure using the single mounting bolt, making sure not to over-tighten. The unique design seats the filter firmly with even pressure, minimizing the chance of leaks and simplifying future maintenance

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  3. Reinstall the seat and check for proper fitment.

When to Clean & Replace

  • Clean the air filter after every ride in dusty or wet conditions. In cleaner environments, inspect after 2-3 rides and clean as needed.
  • Replace the air filter if you notice significant tears, weakening foam, or permanent staining despite cleaning. For heavy riders or racers, replacing several times per season improves consistency and engine health.

Special Notes for 2019 GAS GAS TXT Racing 300 Owners

  • Unlike many off-road motorcycles, the GAS GAS TXT Racing 300 airbox is slim and ergonomically designed for trials performance. The single-bolt filter access is a proprietary feature that makes maintenance much quicker – perfect for riders who value agility and quick multi-section adjustments

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  • Always use OEM or equivalent quality filters (such as Twin Air dual-stage foams) for the correct fit and best protection

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  • While cleaning, also inspect the airbox for water or mud–the TXT Racing 300's unique airbox design is effective, but extreme riding may still introduce contaminants.

Trust MotoSport for Your 2019 GAS GAS TXT Racing 300

Count on MotoSport for everything you need–from OEM replacement filters and cleaning kits to oil and spare parts–so you can focus on riding, not wrenching. Keep your TXT Racing 300 ready for every challenge with regular, simple air filter maintenance performed in minutes thanks to smart GAS GAS design.

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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.