2000 King Quad 300 destroys regulator/rectifiers

[dvdclarksn]

 I have a 2000 Suzuki King quad 300.  I replaced the first regulator/rectifier when it was about 10 years old and had maybe 1300 miles on it.   I made the mistake of using a cheap part and had to replace it again with the factory part after just a few hours.  This regulator survived for maybe another 300 miles. I couldn’t get the bike to start and thought I had a weak battery and put it on a slow automatic charge for about 12 hours. It still wouldn’t start and the battery was about four years old so I replaced it with a larger battery that was also optional for the bike.   When I turned the switch I had nothing so I now have another regulator/rectifier that I am replacing.  Has anyone else had issues with this bike and this part? It’s really just a pain to take the rack in the front fenders off to access it for replacement. Dread doing this job over and over. Thanks everyone. 

[MarkinAR]

If the 2nd replacement was OEM, was it used OEM?  Pretty unusual for an OEM reg/rect to not last forever, but anything is possible.  I'd check the stator phases and make sure they're all within spec.