this is what it does when its cold... http://www.youtube.com/watch?v=4_Gasm7uiR8 this is what it sound like running http://www.youtube.com/watch?v=S0b8s8zh1-E I have a problem with starting my old 1998 wolvy I put in a stage 1 cam and now it doesn't start to easily I tied starting with the choke still isn't any better. It also make a knocking sound while it turning over in the starter. Once it starts an warms up it starts perfect. Just can't figure it out. Tried cleaning out the carb I put a battery charger on the battery to make shure I had full charge. I have lots of power . And the power range is good from bottom to top end I get about 60 mph / 100 kmh easy with. Any thoughts?