I have an issue with sportsman 90cc, 2003. It only runs with good power if the choke is on a little bit. , I’ve cleaned the carb to what I think is good. just got the bike and the carburetor was loaded with filth from fuel sitting in it. i’m new to 2 stroke engines so any help would be appreciated. THe machine does not have an electronic idle enricher. Anyone know how many turns the idle enricher screw should be set at?