Lost on what to do now

Hey, I put up threads a couple weeks ago about my 201r sportsman 570 and having trouble starting and keeping running, you guys mentioned the voltage regulator could be busted and it was so I got a new one off of Amazon which was cheaper than at the dealer. So after a week straight of running flawlessly this morning I went to take her to the barn and it just shut down on the road. No power to start up, so I charged it and still no use. Now when turning over it goes (and don’t laugh) wann wann plunk and it repeats without firing one bit. Any suggestions would be helpful I don’t even know where to turn now.