I have a question about correct colors for Z50's. I just pick up a K1(69) and a K4(73) and both of them have been painted black. Does anyone know of a color chart out there for these bikes? What I mean is... I want to paint them the correct color but I don't know which color they were suppose to be by looking at the serial. I could not find the old color anywhere on the bikes. Looks like they were dipped and completely stripped. I've been looking all over the net and couldn't find a cross reference to what serials were what color. Thanks in advance.