Originally Posted by bmwktmbill
I would check the ground connection at the battery for tightness, then the positive connection.
Wiggle the main fuse, make sure the contacts are tight.
Do you have issues with the dash lights?
If you do I would consider the ignition switch, not a bad idea to unplug/plug that connection to the main wiring loom.
Do you have a kickstand switch?
Last winter I lost all electrical and eventually traced it back to a connector with two wires that looked scored/burned. A few weeks ago I had some trouble with the headlight failing due to a loose fuse connection.
I wouldn't be surprised if something else is wonky with the wiring.