Honda didn't make the 200S in '83. Guess you mean just the ATC200.
Check the intake for restrictions.If the air box is attached to the frame, make certain the frame isn't plugged up.
Cleaning the carb isn't just taking apart what is held together with screws. It's knocking out all of the brass, which includes the needle jet, low and high speed air jets. Then it's really getting in there with things to get all the muck out, which usually includes a ultrasonic cleaner. Really nasty carbs aren't going to be cleaned with just a can of carb cleaner. There are small passages that carb cleaner alone isn't going to clear.
The story of three wheels and a man...