so did you figure out anything with your jetting. I am running a Nibbi PE24 and it runs great on any main or pilot. I'm at 950ft and currently running 130 main and 38 pilot. I think tomorrow I am going to step up to a 42 pilot until i go rich, Right now I can't get a plug to change colors. Just stays pretty much brand new looklng after 10 hours of riding and idling. RPM when WOT stop at 3800 rpm