hey guys I just bought a buell and the bike will fire right up no problem sometimes then other times it will just turn over. I pulled boot off one plug stuck another plug in boot and not getting fire. every now and then you will see a spark . the guy I purchased from said he had replaced wires, plugs, coil pack, and a few more things only thing he hasn't done is the cam sensor sorry if I get that wrong. would that be the cause of this problem?