I replace mine at the manual stated intervals. 18,000 miles. Some have looked bad but kept the bad crap out of the intake side. When I get close to the interval I order one either onine or though the local dealer who is only a few bucks more but they pay for shipping and replace it when I get to it. It sucks they went that way with it but that's the cost of basing it off of the SV650. My SV650N was quick to do a filter on because there were no fairings. The Strom would be super easy and quick to do if I didn't have to wrestle the side fairings around the crash bars.
The side fairings on the storm with crash bars on take as long to do as everything else combined.
2004 DL650 "HMMVStrom"
1978 Suzuki GS1000 "Tennessee Hillbilly"
1982 Suzuki GS850G "Barnfind"
2008 MazdaSpeed 3
My channel ^^^