Too bad you are in Southern Cal, because I have the original tool to do that job. Michael has a good idea about bending a Craftsman wrench. I wouldn't use a much cheaper tool, because if you round those nuts, you are really screwed. By the way they should be 12mm. Also it is too bad you don't have anyone dow there to go through those carbs, because you won't get any better carbs than those Zeniths.

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