Originally Posted by Dustykat
.... after I got the bike running, the volt meter showed 12.75 with the engine reved up and a full charge on the battery. ...
That is a FAIL, not a pass.
12.75 is not a good result and means you have a phase down at minimum - you either have stator or R/R fail - do the tests per the sticky reference thread.
You say you diagnosed to the regulator and replaced it, but now appears it was more likely the stator - was the R/R plug n play, or did you do any wiring yourself to connect it up?