I have an 81 HONDA CB750 that will not electric start. The battery is fully charged. One day I started it rode around for a bit and then stalled it (still learnin) and when I went to restart it it wouldnt do anything. I pop started it and it ran fine. But even after riding for 30 mins I shut it off and tried to electric start it again and it does nothing but a small click. It doesnt attempt to turn over or anything. I know the obvious make sure its in neutral have the clutched pulled in etc. I even had experienced riders try and nothing. Any idea what the problem is and how much it would cost to fix? thanks