This is my version of an air filter protector for KTM and Husqvarna dirtbikes, from years 2017 - 2021. For some reason, KTM made the air filter frame with a pointy cross in the center which presses into the center of the air filter and eventually can tear a hole in it.

I made this one fit tight, press it on and it won't fall off.

Drawn in Fusion 360.