Yup. Definitely. I got that PWK to run well, but a little rich. Trying to tune out that last bit of richness meant tipping the scales to not running well. Maybe a slightly lower (or higher? Can't recall which way) main jet would do it. Plugs get black. Not terribly sooty, but black. Exhaust opening has quite a bit of black stuff on there too. But like I said, when I try to tune out that last little bit I end up not running well.
I think most folks with these PWKs have mentioned running a bit rich.
And yah, a great feeling for sure. Thanks.
*Hope you are doing ok in NYC with all the Hurricane madness. What a mess.