Alright I am having a hell of a time trying to get my bike to idle. It has been running awesome all summer, however I took the backfire screen out as i noticed how restrictive it really is after some examination. After riding today, I noticed that the bike would run fine if I rolled on the throttle, however if i gave it any quick burst, EVEN if the revs were already up it would completely die. Still had plenty of power if i didnt let it get to that though. I figured it must be running a little lean, as I am getting more air to the carb so I put in a bigger (165 from 160) main jet. Now Right after I did this it seemed almost worse, so i started to adjust the air screw, turning it all the way in and then out .5 turns as a starting point. It obviously idled a little low so i started to adjust the idle knob. Not surprizingly, i completely lost track and have NO idea where that thing needs to be. This is not the problem i dont think though. I turned the idle all the way up, to the right, and it still wont idle, but it seems to run strong if I give it gas to get it started. Honestly i just spent more than an hour trying to get the thing to start up and idle, but it will not run, even with the joke unless i am giving it throttle. I tried going back to the original 160, and even a 155, making sure they were all clean, but it WILL NOT IDLE. I didnt touch the needle at all, so i dont think its a carb cleaning issue. Sorry for the long post, I just need to figure this out. Any help would be appreciated.