the engine has about 5 tanks through it, its still new. I have'nt touched the low speed at all. I did get the high speed to sound right. 3 or 4 clicks rich from peak rpm's. Yes I do know what a click is. Could this be a low speed problem. I have'nt touched it. it idles nice. I have'nt had anyone else look at it yet. I may end up having to get someone to check it out.