Yes they are stock mufflers, I have checked the exhaust while I had it off and seemed to have minor leakage around the Y of the right side, I used some steel putty stuff around it just in case.
I have checked that I put the vac tubes back on securely also but yes I am going to spray check the intake system.
I am thinking a bit of cause and effect here, the AIS disconnect is 90% cure, a couple little pops out of it on way home tonight running it very hard. I can smell a bit of raw fuel someplace so although it is much much better I don't think this is the end of the investigation.
I know very little about carburetors, even working on cars for years I never did carbs but something is still not correct I think.
I am going to get the valves checked in the off season, not willing to try it myself alone for first time during riding season, so a mechanic I know is always good about fair rates in the winter when his shop is dead quiet.