Question1, has anyone tried using the YZ needle verse WR when doing the mods. If so what are your settings? Question 2, Currently using the YZ on clip 3 from top with 170mj and 48 pj, and one turn on the fuel mixture. Seems abit fat at low end. Black around the pipe tip. Not getting more than 25-30 mpg. (need 35-40) Should I change to the WR adjustable needle or move clip location ?