What is your voltage from the stator???You check that by putting your meter on AC.motor running and putting a lead on each of the out side spades(White & white yellow & yellow)It should read above 28 volts AC at full throttle.What is your voltage at the battery running???It should be about 13.5 to 14 volts DC.I doubt you got 4 bad VR`s.Could not get computer to down it did not have right software i guess engine man put some pages on here i used,igot 4 regulaters and i dont think all are bad would like to check them if possible imay not have it wired up right.