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450 petcock tubes

  1. Engine, Carburetor, Fuel System & Exhaust
    On the back of the petcock valve I have 3 outlets. One, larger tube obviously feeds the carbs. One goes into the top of the cylinder on the left side of the bike (if you're sitting on it) and the other does nothing. Hopefully from the pics you can see it. Can someone tell me if I'm missing a...