Im thinking I have a junk weber, ill go to webercarbsdirect and see what they got, no wonder I didn't like the performance of it when I had that weber I had on to begin with, didn't seem right. Yeah secondary might be the problem on the Mikuni. If only the 30 year law that made cars require smog, I think they go rid of it in 2005 sadly, wouldn't have to worry too much on this stuff.