Your just trading in one problem for another. You need to just order a jet kit and do the duty of tuning the carb. No one can tell you what jet to get. Everyone lives in different enviroments. Altitutde,humidity modifications. If you put pipes on I get your running too lean so you have to go up on your jets. You just have to take off the carb put in one step bigger jet put it back together adjust the mixture. Run it for a little check the plug. Do this over and over going up just one jet size up until you get it right.