Moto 4 Carb Problem

So we own an older Moto 4 350 and It started dripping gas out of the overflow drain of the carburetor about a year ago. We thought it would be the needle and seat (sorry don`t know the right way to spell it) and we replaced that. After a month or two, it did it again, we did the same thing and replaced it. Worked good for a couple months until it was leaking again and we replaced again. We recently just decided to try to work it in a little bit because it seems really tight and it seems like it might being hung up. Anyone else have an opinion on this?