Air Filter Cleaning & Replacement Guide for 2009 Yamaha TTR110

Shop parts for a 2009 Yamaha TTR110 Dirt Bike.

Maintaining the air filter on your 2009 Yamaha TTR110 is critical for keeping your engine performing at its peak every ride. Following the proprietary MotoSport guide below ensures you get the most life and performance out of your bike, with instructions tailored for your specific model year.

Tools & Materials Needed

  • Phillips screwdriver
  • Air filter cleaner (foam filter compatible)
  • Air filter oil
  • Mild soap and water
  • Clean rags
  • Replacement air filter (if needed)

Removing the Air Filter

  • Remove the right side fairing to access the air box. The TTR110 uses multiple Phillips screws for this step–take care not to strip the heads.
  • Unbolt and remove the air filter case cover. There are three Phillips screws securing it on the TTR110.
  • Gently pull out the foam filter element. Inspect the filter for dirt, tears, or deterioration. The 2009 TTR110 features a reusable foam filter, but it should be replaced if you spot rips, holes, or damage that can't be repaired.

Cleaning the Air Filter

  • If the filter is reusable and in good condition, gently tap or brush off loose debris.
  • Wash the foam element in warm, soapy water, then rinse thoroughly. Avoid harsh solvents, which can degrade the foam.
  • Let the element air dry completely–do not wring or expose to excessive heat.
  • Apply air filter oil evenly over the foam; squeeze gently to distribute. Insufficient oiling will allow dust and grit into your engine; too much oil can restrict airflow.

Cleaning the Air Box Cavity

  • While the filter is out, use a clean rag to wipe down the inside edges of the air box. Pay close attention to the sealing surfaces. 
  • Inspect the air box drain plug at the lower rear side. Clean and drain as needed to prevent water or oil buildup.

Installing/Replacing the Filter

  • Carefully reinstall the clean, oiled filter element, ensuring it seals evenly on all sides of the air box.
  • If replacing, ensure the new foam filter is pre-oiled before installation.
  • Replace the case cover and tighten the screws firmly but not excessively–avoid stripping threads or damaging plastic housing.
  • Reinstall the fairing.

Tips Unique to the 2009 Yamaha TTR110

  • This model's reusable foam filter allows for repeated cleaning, but always monitor for wear at each service interval.
  • Regular cleaning is especially important after riding in dusty, muddy, or sandy conditions–the filter screens and covers are designed to handle harsh terrain, but their effectiveness depends on maintenance.
  • MotoSport recommends genuine Yamaha filter elements and proper chemicals for the TTR110 to maximize filter lifespan and engine protection.
  • Dispose of used cleaning materials and chemicals in a safe, environmentally friendly manner.

When to Clean or Replace

  • Inspect and clean the filter after every 10 hours of riding, or immediately after riding in heavy dust or mud.
  • If the foam filter shows any tears, deterioration, or fails to seal, replace it immediately.

Final Notes

  • Routine air filter care not only prevents loss of power and engine damage, but also ensures your TTR110 keeps performing its best season after season.
  • Keep all tools organized and dispose of chemicals properly after each maintenance session.

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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.