I just got a 04 rancher 400 4×4 from a buddy of mine. It only has 65 hours and 105 miles on it, so it’s practically brand new. It sat in his garage almost the entire time he had it. It starts but will only idle for 10-20 seconds before dying. If I hold the throttle down some it will run for up to a minute or two before dying. If I give it very much gas at all it revs up but then it is almost like it throttles down on its own before dying. I replaced the battery, and changed the oil (it wouldn’t start, and he told me he had not changed it before) both the main and reserve tanks were bone dry so the fuel is new. He said something about putting gas in the carburettor. I am new into atvs and need some help on this please