So i just picked up a new to me 2000 KX500AF scoot. Took it out for the initial run and it is a major dog compared to my CR500. This thing will barely, i mean barely pull the front wheel in first. So I start looking into things including the jetting. It has a FMF Fatty pipe with fmf silencer...rest is stock. 162main, 52pilot. Seems reasonable to me, but it runs so crappy i think maybe it is lean. Put a 168 main in it and it wouldnt get out of its own way at all, now runs like a pw80. Check the compression it is 150 after a few kicks with shoes on cold. So then i decide to check the needle and i find a n4we needle in it. Never heard of that needle before and from what i can find it belongs in a kx250? Does anyone know why that needle would be in there and if that probably has something to do with why it runs like a pile of crap. Is 150lbs acceptable comp? Any help would be appreciated!!