My son races his raptor 125. It has ran great all year,getting ready for gncc this year. Yesterday while he was riding it started popping and then quit. i found that the fuse on the battery side of the starter relay was blown. I replaced it and it blew when I turned the switch on. Can anyone please help is it the starter relay itself or is there another problem. I've been told to cut open wiring harness and look for a dead short but dont know where to begin. i am scared i will do more harm than good doing that, please advise.