🔧 2022 Kawasaki Ninja 400 Air Filter Replacement

Overview

The 2022 Kawasaki Ninja 400 requires air filter replacement every 8,000–12,000 miles or annually. Regular air filter maintenance extends engine life and maintains peak performance. This guide covers the complete procedure for both DIY mechanics and those seeking shop estimates.

Tools Needed

Supplies Needed

Step-by-Step Procedure

1. 1
   Remove the seat and side panels to access the airbox.
2. 2
   Loosen airbox cover screws or clips and remove the cover.
3. 3
   Remove the old air filter and inspect it. A clogged filter will be visibly dark and dirty.
4. 4
   Clean inside the airbox with a damp cloth — remove all debris.
5. 5
   Install the new filter, ensuring it seats correctly in the airbox groove with no gaps.
6. 6
   Reinstall the airbox cover, tightening screws/clips securely.
7. 7
   Reinstall side panels and seat.
8. 8
   Start the engine and verify smooth idle — listen for any air leaks (hissing).