Lloyd, hanks for the help. Is the NOZE a single-taper? I'll pick up at least a needle and go from there, I think the needle is the source of surging, too. I had a 42p, and after a WFO section, it would surge at idle, changed it to a 45, and it helped. I wonder if a 42p/NOZE would eliminate the idle surge vs. 42p/NOZG or even 45p/NOZG(still surges on occasion). Will jetting alone help the decel knock, or will I need to run race gas, too? BTW, do you have a dirt bike anymore?