Well I've got my muzzy super pro on and when I ran it I was running way rich. I pulled the plug and it was black. I jetted down to 182/182 and ran again and had the same result. Down to 180/180 and still bogging down bad until I get towards the top end and then it runs like a bat out of hell. Each time I jetted down I would work the fuel air screws from 1/2 turn out to 2 1/2 with no help. I have the needles shimmed with the #4 washers, could this be part of the problem? I started with 185/185. I have the twinair powerflow and 12 hole mod. Anybody got a clue whats going on?