QuestionI am having problems with my 1978 cb550 k. there are two lines that go into the second carburetor from the left, the petcock has only one outlet. Can you tell me what to do with both the lines?
AnswerJoel, the illustration on bikebandits is a little vague
http://houseofmotorcycles.bikebandit.com/Honda-Motorcycle-CB550K-1978/o/m9449
One line, that you can see more towards the inlet part of the body should be the fuel line from the petcock. All the carbs are tied together through the interconnecting lines between the bodies.
A second line isn't really shown there, but I suspect that it is tied into the float bowl venting system and may not connect to anything.
More resources for your bike are at www.sohc4.us
Bill Silver