From what I read in my manual, it would appear that there are specific tests to be taken IN ORDER to determine if a STATOR needs replacement. Same thing with the Regulator. I don't have it at hand, but I was deep into it diagnosing* a starter issue recently - all up and running now!
If tests to date indicate a bad regulator, accept those results and see about returning the one customer purchased before pulling the engine (BTW there is only one motor on the 330 and it is the starter motor - the device that helps start the engine!).
Look in the SPECS section and the Troubleshooting section to see if you can find the diagnostic checklist. There HAS to be one 'cause CanAm has to be able to fix what they sell! By now (what 20 years on) they should have run into just about everything that might go awry and has.
At least three CANAM dealers however, told me "We don't work on ATVs that old." One wanted $125 to 'diagnose' the problem when I asked "How much to R&R the starter?" When I told him I wasn't looking for a second opinion, just a price for the R&R, he (Schronce Powersports, Taylorsville, NC) told me that there likely weren't any starters available!
Best you can hope for is a fellow mechanic with a link to a great repair manual and electrical system checklist. I would also search Diagnosing electrical issues on" 2004 CAN AM Outlander 330" with two fingers crossed. Just possible that mechanic with the checklist did a video!
I found a list of repair manual files on this page - but have NOT d/l'd anything from it. http://files.brptuning.ru/Bombardier/Manuals/ATV/
Let us know what you discover!