im having the same problem, U was told its the reg/rec on the bike why it wasn't charging, I ran another test and found its the stator, just removed it from the bike and thank god I found a nice burn't bit, I can only find the early model stators on ebay at the moment, will have to keep looking, im away in ireland next week so have 10 days or so before I need the bike running

here is what I have found