The 220R I just got has the 35mm KDX200 carb on it. The jets are stock 200. It is a little burbly of the bottom. Has anyone successfully rejetted for the 220r? Oh, it has the FMF Gnarly, Air box mods and turbine core silencer.
Try a 40 or 42 pilot, needle in #2 and a 152 main. Remember "canned" jetting specs are at your own risk - be alert to how your bike runs and check your spark plug.