Hey guys, So I have an 87 sportster 1100 and bike was running great like a top always started right up, one friday night did a burn out with it then parked it the next day went to start it up it cranks and cranks and nothing. I have spark and I have fuel getting to the carb but when i pull the plugs after cranking it they are bone dry. i took the carb apart everything looks to be in order can anyone help me with this? basically its not moving from the carb to the cylinders i know there is a vacuum line on that side of the carb connected to some type of switch or sensor which has wires going back to my harness could this be the problem? I do not even know what this thing is, and i know the top of the carb when i took it apart it some type of diaphragm with a spring and the needle? i have no clue i cant figure it out and i want to ride who can help???