2000 Polaris sportsman 500 charging question

I have a 2000 sportsman 500 and my charging system is giving me fits. I replaced the stator and regulator last week due to it would only charge for about 15 minutes or so then stop and start again after a few min but the charging would get less the longer it ran. So I replace the stator and regulator last week and noticed it was doing same thing as the other set would do. Plus once it got warmed up good and you killed it the unit would not restart till the next day so I put the old stator on it with the new regulator and it ran great no mater how much you ran it it would restart but it still only would charge for a little while then stop and start charging again. Just like the other one. So went ahead and road it over the weekend and melted my regulator. Any ideal on what's going on with it ???

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2000 Polaris sportsman 500 charging question

I have a 2000 sportsman 500 and my charging system is giving me fits. I replaced the stator and regulator last week due to it would only charge for about 15 minutes or so then stop and start again after a few min but the charging would get less the longer it ran. So I replace the stator and regulator last week and noticed it was doing same thing as the other set would do. Plus once it got warmed up good and you killed it the unit would not restart till the next day so I put the old stator on it with the new regulator and it ran great no mater how much you ran it it would restart but it still only would charge for a little while then stop and start charging again. Just like the other one. So went ahead and road it over the weekend and melted my regulator. Any ideal on what's going on with it ???