I have a 77 sportster that dies when it gets hot. I have eliminated coil, plugs and wires as well as wiring as problems. i reset the timing and points. The flyweights etc are new and ok. It seems to be hard to start as well sometimes. I was wondering if anyone knows what the generator output should be at idle and when revving up to about 2000 rpm. Would it have an effect on the way it runs if it is around 12v charge when running. It seems to backfire a bit before it dies as well. I,m scratching my head on this one so any help would be greatly appreciated. Thanks in advance to anyone who can help me out. Bye for now.