When I rev my 2007 Hammer it stalls and turns off. Also, I put my hand over vented air filter cover and when I rev air is forced out. If I roll on gently it sounds fine. I have Victory perf shotguns with K&N and Lloydz VFC II. I have been having starting/idle issues too. After I installed VFC, startup idle is about 500rpm. It's 2 1/2 hours to closest dealer. Any ideas as to the problem is greatly appreciated.