Get the rec/reg here: https://rover.ebay.com/rover/1/705-53470-19255-0/1?mpre=https%3A%2F%2Fwww.ebay.com.au%2Fitm%2FRegulator-Rectifier-Voltage-For-Ducati-Monster-600-620-696-750-796-800-900%2F153230800025%3Fhash%3Ditem23ad447499%3Ag%3A0JUAAOSwNmxb0Fm-&campid=5338450048&toolid=20008
After finally fixing the starting issue on this Ducati Monster 620, I had another, much more complicating one to wrestle with. I eventually traced down the problem thanks to a forum post by "Brad".
Here it is here: http://www.ducatimonsterforum.org/index.php?topic=55776.15
It was surprising that this was the only thing on the net that actually explained the full process and how exactly to troubleshoot the problems. Probably down to my searching skills, but there you go.
So, after numerous hours of searching, reading, looking for information left right and center, I finally got there. Then I tested the monster's stator, rec/rec and battery and away I went.