My '03 is having problems.
I took the plug off of the R/R & tested the AC voltage with the bike running. One leg has around 25 volts on it, and the other 2 have less than 10 volts.
With the bike running, the output from the R/R is about 13.1-13.2 volts, but at the battery, I am only measuring about 12.4 volts.
Is there another plug before the one at the R/R, for the stator, that could possibly have bad connections?