My mixture screw is turned out about 6 turns and the bike idles ok sometimes kind of up and down but if I turn it in to 3 or 4 then it idles like crap. I think I need a new pilot jet. Where could I get one at? The dealer said they only carry stock size. I have the dynojet kit it with the needle on 4th notch and a DJ 148 main in if that helps.