usual blackness is definitley rich, especially since you said the plugs were new. do you know what a WOT test is? (check top of jetting forum)
buy a set of new pipes and get rid of your stockers and i bet it will even out, im willing to bet the pipes get hot because there gummed up or may have had oil in em at one time. so your right there.
id like to say welcome to the site, and im glad to let you know you found the right addiction to small engine tweaking, your banshee will either love you or hate you :happy:
buy about 6 new plugs and do a proper WOT test and go from there, sounds big time rich and id partially agree with the shop, stock pipes may not work right with pods, thats alot of air and your pipes use resonance to send unburnt mixtures back into the cylinder so without some curvy bling it may either always be rich or lean somewhere.
anyone else on here running pods on stockers? Im running my own version of a pod (cut the airbox up and kept the intake part with my filter bolted to it all open around it) and im running 320 mains with 3rd pos needle on FMF pipes.
edit* i jetted it when i was 14 tho.... probley why shee blew up fuck only knows.