Help with my trx200 (same as 84 200es shaft) when I first bought the bike it was running okay. Cleaned the carb and jets just because who knows when it was done before. I was a little confused when I found the air fuel screw all the way in. When I got the carb back together to factory specs it would bog on a quick shot of throttle but okay if I slowly pressed it. It also would die after idling down a long hill. Doubled checked all my adjustments and everything was good. I slowly turned the screw in giving it quick shots. It cleared up when the screw was all the way in. Should I be worried running like this? What could cause this? Thanks.