We're going to install the vacuum slide in the needle and I'm going to show you the little tricks and tips about this and this is going to be really universal on multiple carburetors not just Harley-Davidson. We've already went ahead and inspected that there's no tears on this and what I'm going to do is I'm going to go ahead and build this up now. First thing I'm going to do is I'm going to slide my needle down in place. Do you see how there's six fingers if you will? So what do you want to bet that these have to line up in there? And see how I believe right now I did not get it to line up? You got it. See how you see them now? Boy is that tension in detail or what? That hole right there will get into that when we talk about theory. You see the hole on the top of the slide there? That's what determines how fast this is going to lift up and down. It's called a slide lift hole. So now I'm going to go ahead and put my spring in here and then what I'm going to do is I'm going to go ahead and just put my finger on this assembly and that baby's not going anyway. Listen, on all these slides here this should have a little bit of spring tension and it should not be rigid. If it's rigid or locked in place, see how this is flopping around? That's a good thing. If it were like this, it's side loaded real heavy, something's wrong. You need to be able to take it back apart. It's jammed, it's cocked. Maybe there's a burr on the slide or the needle. Something's not right on that. So we want to be able to have that play in there like that. That's inspection number one. With this just sitting on here, I'm going to go ahead and slide it into the carburetor. It only goes in one way. So if you try the first way and it's not working, you just flip at 180 degrees. That's the case of what I'm going to have to do here. And then I'll show you from this side, I need to make sure I'm aiming the needle into the emulsion to hold there. Does that make sense? Okay. I don't need to hold pressure on the spring anymore. Things are good. If I try and put that cap on and that's not in that groove, this will not function. This is a sealed chamber. We have air above and below this on that lab sheet that I gave you guys last night. We're going to identify these different areas between low pressure and high pressure. The hole that's drilled in that slide actually lets air go through here. It fills this cap in here. And as we run the motorcycle, the pressure in this cap is going to get less than in the carburetor. And it allows it to overcome the pressure in the carburetor is more than up here. So the carburetor air pressure will actually push this slide up. That's how this moves up and down on its own. Lower pressure up here, higher pressure down below and that's what pushes it. Okay. But I have to have the sealed because I have to be able to have the ability to have a pressure difference. If I take it, set this all the way down. Sometimes the slide is shrunk and it will not go in this groove. And you're going to find it very difficult. The trick is to have the diaphragm expanded. And then you're going to just kind of go up and down with this a little bit and you're going to find a sweet spot that you kind of see how it didn't. It doesn't want to sit very good right there. It was kind of wanting to go off. Okay. As I go ahead and put this in, I'm happy now. I'm seated all the way around. You notice there that there's a locator for the spring. Okay. Look at the cap here. And you see how there's a couple raised dolls. So look at the carburetor. And you see how there's only two that have it and two that don't. So I want to be intentional when I go ahead and put this on. And then the next thing I'm going to do before I put my bolts in is I want to go ahead and give it a quick test. Do you see how that returns on its own? Let me show you something else that you can do to really give yourself that verification that this is working. For all purposes here, I'm going to go ahead and I'm going to put two screws in. Once I just have two of these in here, it's good enough to, I don't have to hold it anymore. And this shouldn't bend enough to where you'd have some type of leak or whatnot. But check this out. This is really cool. A lot of people don't realize this. You remember how I said that how this lifts is a higher pressure and a lower pressure. So the pressure through here is atmospheric. So atmospheric pressure is going in here and we have that lower pressure that's going in here and the higher pressure, the spring wants to push that down. Watch this. Air gun, low pressure, very low pressure. Watch what I can do. I can test the carburetor's function. It's not smooth, it works. But by doing this, and you can do this on multiple cylinders, if I had a pinch slide, would I catch it now? Yep. I'm going to finish up a couple of things here. We're trying to be really super diligent with service manual usage, right? Yeah. Okay. YouTube, all you carburetor people. The majority of the people that watch these might be entry-level texts and the people that probably need to see some of this aren't watching these beginner videos, are they? Once the top is installed correctly, install the collar and the screws. On an FXSTD model, apply lock tight thread locker 243 blue to the four carburetor top screws before installation and then tighten 17 to 23 inch pounds. Okay. 17 to 23 inch pounds. That pretty small number. Yeah. Pretty small, faster. Yep. Now, what do you think is going on here? They just have that on one model. Okay, guys, when installing the choke cable here, once again, we got a rubber seat on here. I highly recommend some lubricant. And this is plastic. Even the aftermarket world has come to the rescue for how many people have broke this fitting with it just being plastic. Just going to thread that in by hand. It's nice to do this now instead on the motorcycle to not let any junk get in there and then also because you have a little more room to work. And then just a little snug like that and that's it. You don't want to break that. That is how you assemble a Harley Davidson carburetor.