Wow, mine had a metal tang. Can you add shims under the seat in the body that the needle goes against. But finding washers that small may not be feasible. Steve from SISF may have the answer as he works on carburetors all the time.
Wtf???
Man, I don't know where you came up with that, but please, refrain from carb assistance from now on.
As for that photo, I have no clue as to what carbs that came from, but it isn't a Kehein CV carb from a Concours....
If it was in your bike, sombody severly hosed you up....
My Photobucket host site is messed up, as soon as its corrected I'll post a photo for you...