i have a 2001 banshee with paul turner mid range pipes, runs great, i put cool head on it with 21cc domes and it ran like shit after wards, pulled the head and checked to make sure the o-rings looked good and they did so put it back together and same thing. if i pull one spart plug wire and it runs on one cylyinder, if i pull the other one plug wire after puting the the other one back one it wont run, but if i switch the wires it will run on the one wire but not the other, could the coil be weak on one side, or could it just be the boot, i would think that the coil fires both at the same time so if one is good the other has to be good. any help