I can only say/report what I've seen and to date I've not seen what your telling us. I also think if it was as bad as your saying it would be on many a bike forum, again I'm on many. To date I've not seen anything about how bad as you're telling us. Only certain people's preferences for whatever reason. I've had loads of owners over the years slating K&N and other pre oil filters, be they cloth or foam. In every case I've had, it's either over/under oiling or cleaning wrongly or not cleaning.
I have had some poor experiences with the foam types for fit and quality and reusability. Never fitted a DNA, which from a quick look appears to be a direct copy of a K&N.
Show us your evidence?
I have had some poor experiences with the foam types for fit and quality and reusability. Never fitted a DNA, which from a quick look appears to be a direct copy of a K&N.
Show us your evidence?
Later