I posted earlier asking about ignition module but i think i have side tracked the thread with too many variables. so lets try this again. I have a 2007 vstar 1100 that i have changed to vance and hines slip ons, rejetted the carb, and removed the ais system. for the first few weeks after doing all this work the bike seemed to run great. two weeks ago i forgot to turn the ignition off and left for a few hours. when i got home the battery was completely dead and i tried to boost the battery to get it running. the boost didnt work and i went a bought a trickle charger and charged the battery. after giving it a second charge it seemed to be running a little rough. I noticed at higher speeds that if i accelerated it would gutter and get loud not producing much power. /this has gotten progressively worse until now it does it everytime i accelerate some times quite a bit and others just a little. \any help would be greatly appreciated. i have changed the plugs, checked the fuel cock removing it from the tank and flushing out the tank. tried running it without air filter to see if it was an airflow issue.