I've got a '74 Honda Z50 Stock with a stock carb. I has 655A stamped on it. I orded a part #3 (16012-120-004) it is a 4 part package. For the life of me, I can't figure out were the tubular piece goes. I have removed part #17 in the diagram. Does the part#3 tubular piece go in before the main jet #17? If so, how do you get the old one out? Thanks
Part 3 in that diagram is called an emulsion tube and can usually be popped out with a moderate push from above. It pokes up into the venturi of the carb and the needle pokes into it.