Air Filter Cleaning – Replacement Guide for 2018 Yamaha TTR50

Shop parts for a 2018 Yamaha TTR50 Dirt Bike.

Keeping the air filter in top shape is essential for the 2018 Yamaha TTR50’s reliability & performance. Dust and debris can quickly foul this entry-level dirt bike’s air intake, making regular maintenance a must—especially for younger riders who may ride in diverse terrain.

Why Air Filter Maintenance Matters

A clean, well-oiled air filter keeps dirt out of the engine, ensuring smooth performance, easy starts, and the long life Yamaha is known for. Neglect leads to clogged filters, poor throttle response, and possible engine damage—issues the TTR50 isn’t immune to, given its popular use in dusty riding conditions.
The TTR50 uses a durable foam filter, designed for cleaning & reuse rather than frequent replacement.

When to Service the Air Filter

  • Inspect & clean whenever riding in dust, mud, wet, or sandy regions.
  • Under normal conditions, check every 5–10 hours of ride time, or per the maintenance schedule.
  • Replace only if damaged or repeatedly fails to come clean.

What You’ll Need

  • Phillips screwdriver
  • Dirt bike air filter cleaning solvent (never gasoline)
  • High-quality foam air filter oil
  • Disposable gloves
  • Seal bag or plastic bag (to oil the filter evenly)

Step-by-Step—Cleaning & Replacing

  1. Secure the Bike
    Ensure the bike is parked safely & off.
  2. Remove Air Filter Cover
    Locate left side airbox cover. Remove the three Phillips screws holding it.
    Gently wiggle the cover off, keeping track of the drain plug at the bottom of the airbox—remove & inspect for debris.
  3. Remove Filter
    Pull out the sponge filter and mesh layer carefully.
    Note: Handle the foam gently—never wring or twist, which could tear it.
  4. Clean Filter Element
    • Rinse mesh in dedicated solvent & wipe dry.
    • Immerse foam in solvent, gently squeeze out dirt & solvent repeatedly until clean.
    • Do not use gasoline or any low-flash-point solvents to avoid fire hazards.
    • Let the foam dry – do not use heat.
  5. Oil the Foam Filter
    • Place dry filter in sealable plastic bag & apply air filter oil all over.
    • Squeeze the foam in the bag until fully saturated, but not dripping.
  6. Reinstall Filter
    Insert the oiled filter and mesh. Make sure it sits properly to seal the airbox.
    Reinstall the cover & screws; check the drain plug.

Quick Tips Unique to TTR50 Owners

  • The TTR50’s foam filter is robust, but handle with care to avoid tearing.
  • Always inspect the drain plug for water/oil—easy to overlook but critical for keeping contaminants out.
  • If the filter is falling apart or refuses to come fully clean, swap it for a new OEM part.
  • Chain adjustment requires regular attention as well—stretch is common on this model with new chains.
  • Dispose used oil/solvent/filter materials in an environmentally safe manner.

MotoSport Exclusive: Pro Service Advice

Periodically, check your air filter mesh for holes or tears—any breach will let dirt into the engine. Always select high-quality oils & genuine Yamaha or trusted aftermarket replacement filters for best lifespan. If your TTR50 is often ridden by beginners, inspect more frequently until good habits are established.

Signs Your Filter Needs Replacement

  • Visible cracking, severe staining, or missing foam
  • Thin spots or holes in the mesh
  • Persistent poor engine performance regardless of cleaning

A little attention keeps your 2018 Yamaha TTR50 running strong for years of fun. Get all the maintenance parts you need from MotoSport to hit the trails with confidence.

Related Shopping Categories

Shop Air Filters for a 2018 Yamaha TTR50 Dirt Bike.

Shop Air Filter Oil for a 2018 Yamaha TTR50 Dirt Bike.

Shop Air Box Covers for a 2018 Yamaha TTR50 Dirt Bike.

Shop Tools for a 2018 Yamaha TTR50 Dirt Bike.

Shop Intake Parts for a 2018 Yamaha TTR50 Dirt Bike.

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.