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I could really use some help identifying some disconnected components on a Yard Sport YS400. The first part is this pipe, which comes out of the exhaust port area or the cylinder. It looks like it had a piece of rubber hose on it, but the hose is gone, and I have no idea what it was previously connected to. The second item is this vacuum valve looking thing. Again only one line is still attached. What is it's function and what other lines should be connected to it? The last thing is this hose, which exits the side top of the fuel tank (not the fuel line hose) but is not connected to anything Any help the community could provide would be greatly appreciated. This UTV belongs to a friend, and I am trying to help him get it running correctly for his kids.