My fuel pump DIY experience...
So if anyone's been following the forums, you know that my fuel pump died outside Sturgis, etc.
Anyways, the symptoms were that I could hear the fuel pump running, but it wouldn't build any pressure. So automatically I relate the problem to the fuel pressure regulator. I pull the pump out of the tank and sure enough the FPR wiggles around in its mount completely loose. I remove the two screws holding it in and the o-rings surrounding it are naturally hardened and flaking away. (Thanks ethanol!)
To the point... I searched around different part stores for a day and found that a 1994 Jeep Wrangler uses and almost identical fuel pressure regulator except it has a vacuum plug on the back. I ordered the o-rings for it for roughly $11 and the fuel pump works perfectly again. ~52psi running and under load.
In the end... At first I was quoted $650 for a new pump(is it gold plated?). Then I was faced with a $200 rebuild(which is a great deal). But I then found this fix for $11.
If anyone else is troubled with this unfortunate fuel pump problem, please look into this simple fix if it applies to your situation. I've rebuilt BMW engines from the ground up and still choked over the cost of parts on this American bike... Hopefully this helps somebody.