I just rejetted my carb and put on a Hypercharger kit and am having weird issues. As best I can describe it I get a sound coming from my carbs that sounds like it is backfiring through them. I have Cobra Classic Deluxe Slashcut exhaust on there and am running the 134 and 138 jets that came with the Hypercharger. It runs great at Wide Open Throttle(WOT) but is essentially misfiring in idle and cruising situations. It also is having some problems with backfiring through the exhaust. I will be replacing the exhaust gaskets and am going to check compression on the cylinders in a day or two and see if it comes up with anything off. Any ideas or suggestions?