Hello all, I bought a 1990 xr200r, all original down to the chain, sprockets and tires. it was not abused or stored improperly. I changed the oil, rebuilt the shock, and off I went. It started okay, but had problems idling and mid-range bogging. I rebuilt the carb with a new pilot and main jet (stock size), new float, set float height, new needle (stock clip position) and generally cleaned the carb very well. Also put in a new spark plug. The bike now starts first kick, idles well, and revs out fine. The problem is in the mid range (1/3-1/2 throttle). If I hold it at steady RPMS there, it will bog and sputter. The plug was black, so i assumed rich condition. I dropped the needle one clip, and it got a little better but not much. I am not sure what to change, and I don't want to change everything at once and get much worse. Does anyone have advice as to what I can do to remove the mid-range rich condition? Thank you for reading!