I have a 2005 V star 1100. when at idle it has pauses or hesitations. I am not sure if you could call it a miss. It also pops on deacceleration. It has done then since owning it. the previous owner told me the ais system needed to be bypassed but it appears it has already been done. I even disconnected the bypass hoses to see if it would change anything, but didnt. I have changed the plugs on it. What might be the problem?