I have heard that if you go from standard bulbs to LED'S you have to get some sort of a voltage equalizer to put in line before the new LED bulb's or you can get feed back into the electric system and damage the charging system?
You might be getting feed back? That might be why you blew the head light and are blowing fuse's?
I don't have LED'S on my bike but have done some research on the subject? But can't say really one way or the other if this is true???