Your buying 1 Brand new replacement fuel petcock for the 1970-1975 kawasaki f7, f5 , f9 175 & 350cc 2 strokes, this is not a vacuum petcock like the original, its a simple on/off, if your wondering what to do with your vacuum line, you just plug it, and all u have to do is turn the fuel on off, these petcocks are guaranteed to work and fit only the models listed above. we have been using them for years and they work great.  if you have any questions ring 2174540492. We can answer any question, and we have a large selection of hard to find parts. Thank you!