1990 TRX200 rough idle; high then low with popping

Before I get into it, I just wanted to see if anyone had this similar problem. When riding it seems to do fine. It’s just rough idling and popping. I adjusted the air intake screw and he helped nothing at all. I was told the carb had been rebuilt quite recent. Here’s a video.

https://www.youtube.com/watch?v=fkW7OolfG8o