thanks for the carb info, it is definatly running lean, the exhaust is turning red hot from the jug all the way back, and that was with a 170 jet, so now i'm kinda scratching my head on it, the only other thing i could see possible is some trash in the carb, restricting the orfice holes and causing it to run lean, so tomorrow i plan on completly taking the carb down and cleaning it . should i go in with a bigger jet than 170, i have a 175 left?, and also where should i set my top pin?