I was working on the Guzzi last weekend, had the seat and side panels off .
I had a lot of electrical issues when I first got the bike 12 years ago, easy fix once I found that the majority of ground wires were not in contact with the frame .
The previous owner had neglected to put the grounds on the negative battery cable where it bolted to the frame .
The diode board is located under the left side panel in a good airflow area .
I saw the large diameter wire lead that I made and thought I'd pass this on .
There are two output terminals on the diode board, I added this extra wire from the board to the battery, improved charging system performance .
If you have the area around the diode board opened up, it's an easy addition to make .
If you have not been in this area before, the output wire from the diode board goes to the positive terminal of the starter .