No power......couldn't pull skin off rice pudding

Hi Kitchi - No sorry I haven't explained very well, what I meant by fouled was, the filters are blocking some holes on the inside of the carb I am assuming, my mechanic guy has the bike a the moment & this is what he has said. I am going round tonight to see for myself, as I have never seen a "Sleeve" on the carb with the cone filter attached to that, all photos I've seen the cone filter bolts directly on to the carb with a B/Clamp.
Hi again, please see photos......the holes on the carbs inlet, where the rubber boot on the filter fits over, were the holes I was talking about previously being fouled, the rubber boot filter neck covers the holes when assembled in place, they obviously aren't able to breathe & do what they're supposed to do. Has anyone who's fitted cone or foam pod filters come across this.......are they the wrong filters etc etc, any advice/experience would be gratefully received
I see what you mean. I am running the stock air box i don't have that issue.

These are from MikesXS they don't look to have the same issue.
check them out there. They have been good to me
I think you're on the right track. All of those various holes/slots in the front provide air signals for various functions of the carbs. They have to be open to the intake air flow for bowl venting, diaphragm movement, idle air siphon, etc.