You may need to oil the foam if it is open cell and big enough pores in it or it will pass dirt like nothing in the filter box at all. The initial oiling up often screws up jetting as the filter acts like clogged until the engine pulls off the extra oil and the plugs will read funny too like too rich.
I don't know why everybody on earth thinks you have to change pilots, I haven't on even wild race engines as the situation there is that you commonly never need to do it. Maybe it's more of the male testosterone thing of working on carbs, that I have to 'do something'. Maybe more likely pushing to sell more parts. Regardless, if you can adjust mixture screws to be too rich or lean at idle you ALREADY HAVE the correct pilot and I don't care who says otherwise. When you adjust mixture screws you are actually changing the jet there anyway but lunkheads don't grasp that. The ONLY reason to ever change a pilot is for barely off-idle transition hesitation and the mixture screws commonly will fix that too if you are good. I think of all the engines I've ever jetted and only one comes to mind as to changing a pilot and I went DOWN on that one or backwards, the needle got changed by the factory and the transition to needle was too rich. I bought a brand new RM Suzuki for pennies based on the previous owner not picking up on that, he kept going UP and the bike ran worse and worse. I bought it and fixed to run perfectly instead of a solid bang out that ran like crap. Made $1000 on re-selling the bike and not the first time I did it either. I used to buy and sell Honda DOHC 4's based on people screwing the carbs up, typically nobody ever set the valves on them and they close up to then miss worse and worse and then the 'experts' rebuilt the carbs (richer of course) to run even worse. Buy one for less than $500 and set valves and put carbs back together while REMOVING the bigger jets and instant $1000 profit for 4 hours work if not more. Bike when bought by me missed outrageously at 4000 rpm or higher, when done it ran at 10,000 rpm every gear easy as spit.
Food for thought...........a DOHC 1100 Honda runs the exact same pilot as a DOHC 750, how can that be?
'...turning the pilot screws helped...'
You all say that, the only problem there is that the normal vacuum at idle of 10 inches or so at closed throttle drops suddenly to maybe 3-4 all the way down to 1 at anything with an open throttle, your pilots and mixture screws dropped flow like a rock then. More like what is happening there is off-idle got a little better and bike owner then thinks overall the bike runs better and how you melt the engine at higher loads.
I've seen those fuel delivery maps Mikuni and other carb makers publish to show you fuel overlap of various jet positions in carbs, the problem being they can be largely bullsh-t.
Of course yours and do as you will, it's just that this planet is a bit more complicated that people think. I'd bet nobody here has seen a big carb that put on a high output engine has to jet DOWN a whopping amount before it will run right.