When i picked up my bike from the dealer...the mech. un-hooked the grey wire, then when he tried to start the bike......no spark. he hooked the grey wire back up, and it started. is there any way to unhook the wire wrong to cause this ? it had to be the right grey wire, because its the only grey wire on the bike. and to those of you that have unhooked the wire, does it make a noticable difference in performance ?