I'm doing a mild re-build on my 2008 FLSTC. To cut to the chase, I haven't got my service manual yet and I am wondering what a certain part is and how to remove it or if I should worry about it. There is a screw in fitting on the bottom of the tank that runs a fuel line to the throtle body. Chrome, threaded, has a black fuel line on the bottom, and a clear plastic fuel line inside. So... what is this, how does it work, do I need to replace it sometime (ie is it a filter) and if so how do the fuel lines come off?