Air Filter Cleaning – Replacement Guide for 2013 Yamaha WR250R

Shop parts for a 2013 Yamaha WR250R Dirt Bike.

The 2013 Yamaha WR250R comes equipped with a washable foam air filter housed within an easy-to-service 4.1-liter air box featuring an intake control valve for optimized air flow and emission management. Regular cleaning and timely replacement of your air filter is critical to maintain the WR250R's performance, safeguard your engine from contaminants, and sustain optimal fuel efficiency – especially when riding in dusty or muddy environments. 

Tools – Materials Needed

  • Clean, lint-free cloths
  • Air filter cleaning solvent or dedicated cleaner (foam filter safe)
  • Bucket with warm water
  • Air filter oil (for foam types)
  • Gloves (recommended due to sticky filter oil)
  • Screwdrivers/ratchet (for air box access)

Accessing – Removing the Air Filter

  • Remove seat by loosening the rear bolts.
  • Locate and unbolt the air box cover (underneath the seat).
  • Carefully lift the cover to expose the air filter element.
  • Gently pull out the foam air filter. Avoid dropping debris into the air box.

Cleaning Procedure (Washable Foam Filter)

  • Tap filter gently to loosen loose dirt; do not bang or use high-pressure air.
  • Apply air filter cleaner and let soak per manufacturer's instructions.
  • In a bucket of warm water, gently squeeze (never wring or twist) to remove contaminants.
  • Rinse thoroughly with clean water until water runs clear.
  • Allow to air dry completely. Never use heat sources, as they can damage the foam.

Oiling – Reinstalling the Air Filter

  • Once dry, evenly apply air filter oil designed for foam filters. A light color foam makes it easier to assure oil coverage.
  • Wear gloves to avoid contact with filter oil, which is often sticky and stubborn.
  • Squeeze the filter gently to distribute oil throughout (never twist, as it may tear the foam).
  • Inspect sealing surface for completeness—a flexible, wide sealing ring helps prevent intake leaks.
  • Reinstall filter securely in the air box. Replace cover and seat, ensuring all fasteners are tightened.

When to Replace the Air Filter

  • Replace if there are visible holes, tears, hardened glue seams, or if the foam feels brittle, thin, or misshapen.
  • If cleaning doesn't restore condition, or if dirt remains embedded — replace promptly to protect your engine.
  • Consider using an air filter screen or cover for rides in extreme sand or mud for added protection against abrasive particles.

Selecting Replacement Filters – Key Details

  • Dual-stage foam designs offer superior filtration for dusty trails; flame-laminated types present higher airflow and durability.
  • Aftermarket options such as high-flow filters can boost horsepower but always verify compatibility for 2013 WR250R.
  • OEM-style wide sealing rings and flexible seams prevent dirt leaks — essential for rougher terrain and longer rides.

Special Notes for 2013 Yamaha WR250R Owners

  • The 2013 WR250R features an advanced intake system and a solenoid-controlled induction system for emissions. Regular air filter service keeps both of these systems performing optimally.
  • The rear sub-frame is detachable, facilitating easy access and reducing costs in case you loop out or need post-ride maintenance.
  • The washable foam filter saves cost over time and works best when properly oiled before each ride.

For best results, inspect your air filter every ride in extreme conditions, and at least every few rides in normal environments. Replacing with quality parts and maintaining proper technique will keep your WR250R running strong — both on the trail and on the road.

Related Shopping Categories

Shop Air Filters for a 2013 Yamaha WR250R Dirt Bike.

Shop Air Filter Oil for a 2013 Yamaha WR250R Dirt Bike.

Shop Air Box Covers for a 2013 Yamaha WR250R Dirt Bike.

Shop Tools for a 2013 Yamaha WR250R Dirt Bike.

Shop Intake Parts for a 2013 Yamaha WR250R 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.