What does it act like ?

O.K. guys I have a question for all you spodes. What does it act like when you are running lean or rich in the mid range ? My 83' KDX200 is had to get the carb slide out and the easiest way I have found is to remove the airbox. So, I would like to get this on the first time. My mid range is lacking , it sounds like it is blubbering (due to lack of words) like blubber,jerk,blubber ,jerk. It doesn't really act like it is lacking fuel like when it runs out of gas and bogs down. When I get about 3/4 throttle it comes out of it and rips ! I am under the assumption that it is too rich . Would this be your guess ?
I am just asking because I would like this to be a one time deal of tearing it apart.
Thanks,
Raz