[FLTRI]

Try cleaning the contacts for the main fuse. Pull the fuse, and sand off any corrosion. Clean the female contacts with a thin nail file (disconnect the battery first, if you're using a metal file, but that should be self explanatory). Put some dielectric grease on it, and button everything up.

I was having the same issues, left me stranded three times. I had the same solution, pull the fuse, wait, put it back and ride on. After I cleaned it a few years ago, it's never happened again...