i have a 2008 hd ultra i put a pair of basic v&h slipons on the bike about 15 mo ago the hd dealer told me if that was all i changed i did not need to do any thing else now i have a miss in it when i start the bike it does not idle right it acts like it is chocking and i have to rev it up a bit to make it idle right any one have any clue to what is wrong