I have a 2001 Polaris Magnum 325 4x4 it starts up first crank and idles fine. When I would ride it through the level field below my house it would run fine. When I take it up the road I live by, I get so far up the mountain and it shuts off. So I rebuilt the carb and I can ride it with no issue with the airbox off but when I put the airbox back on it bogs and loses power. I’m stumped PLEASE HELP!!