Help! What is this tube!?

Hey guys, I just purchased my first quad. It’s a Polaris Sportsman 800 efi 2005. It’s in great condition, though there are what appear to be a couple minor things I need to take care of. Right below the compartment that houses speedometer, handlebars, and top light is a tube that runs down into the main body of the quad. This is my first quad so I don’t freakin know the names of any of these items and I have been searching for this forever. Any ideas what this is and how to fix it?

Attached Thumbnails

Click image for larger version

Name:	image_1461948984881.jpeg
Views:	N/A
Size:	1.03 MB
ID:	43314