its the pilot jet im trying to tune and i dont know how to tune. its idle it wont do. oh yea it idles. ok. with the pilot jet at 50 now. the air fuel mixture screw, screwed in to 0 turns. its just screwed in. then it will run. turn the screw out, i get lower rpms, and worse idle. and it will sit and run with the a/f screw turned totally in. itll run with it turned in all the way, with a 44 pilot makes me think, that and being at a 50 pilot. not to mention, on a 72cc and not a 90 cc is whats making me think that something else is wrong. or hell i coujld wait 5 days, aybe a week, buya 70 pilot, biggest they make, then see if they work. right. that aint going to work. that guy didnt help me and only led me on to my own conclusions i kept doing and know they arent working. he's just a prick. the pilot i heard should be around 42 44, 46 highest.