Hi I own a 74 rd 200 that runs great......after I charge the batter all night. I have put in a new battery inspected the brushes and replace the ignition switch. the damn thing just won´t charged. I have also inspected the set of points under the seat and they have been cleaned. I tried to hook up a voltmeter to the bike but it literally started to glow and stopped working. also if the bike is off and I manually close the cutoff points the main fuse will blow. what is going on with this thing???