The picture in the e-bay listing shows a screw in idle jet/emulsion tube. I think the '70s CX carbs came with pressed in ones. What's the big aluminum plug with the screw driver slot for? Seems like about half the items in this kit are usless and it's missing some important "O" rings, new air cut valves and accelerator pump. Take a look at Randall Washington's web site. I think it's Randakks or something like that. He offers a very complete carb overhaul kit minus the jets. I've used his kit and it had everything I needed to replace all rubber parts and "O" rings in both carbs. plus new bowl screws. You should rarely need new brass jets. Larry has the drill bit diameters in his book to clean them out to origional dimensions.