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HI, this is Beamer, and today we are taking apart a moped carburetor. Right now we’re
about to talk about all of the different pieces of a carburetor. This right here is your main
carb body. This is the float bowl. This is the float. This is the choke slide. This is
the jet. This is the main slide spring. The main slide and the main slide pin that comes
through the middle of it. And then the top of the carb. Basically, the main functions of
a carburetor are to mix air and fuel in the right ratios together before they’re sent
into the pistons chamber. This is where your fuel line attaches to. Gas pours into here
and comes out this main hole right here where this small metal fitting with the rubber tip
sits. This rubber tips connects to your float bowl. These pieces right here basically serve
about the same function as a toilet. When the gas comes in, it fills up in this float
bowl right here. It raises the float up, and once it gets to a certain level, the rubber
tip on that will plug the hole where the gas is coming in, not allowing any more gas to
come in. Once the bowl is full of gas, then you have your jet here, which screws into
the bottom of the carb, which sits just right above the gas itself. When air floats through,
this is where the air flows through. Air flows through here, and it creates a vacuum once
it enters, and as it flows through the middle of the carburetor, it sucks gas up through
the jet, and then out of here it sends it to the combustion chamber. Each jet is a different
size hole. There’s a tiny little hole in the middle of this so the gas flows through.
Imprinted on the top of each jet is the number. The number indicates what size the jet is.
And that changes how much gas mixes with the air. Your main slide, which comes in through
the top here, works in conjunction with all that. When you pull the throttle of a moped
or a scooter or a motorcycle or anything, it pulls this up against the spring that sits
in the top of it. As it pulls it up, it allows the air to pass through, creating the vacuum
which pulls gas into the chamber. Your choke slide, which sits in the back of it, is an
optional piece, usually sits up which has no purpose whatsoever. When you push it down,
the slide comes down and blocks all air from coming through. This helps it start up when
the engine is cold or when it hasn’t been run yet, which allows much more gas to pass
through, which is much easier to start up. And that’s all the parts to a small moped
carburetor.