Gauge Cluster broken?
 

To make a long story short, I came home from work and found that my bike ignition was turned on. Of course, the battery was completely dead. So I hooked it up to the battery tender and left it overnight. I went out this morning and fired it up. I flipped the key on, and the tach needle didn't sweep, and my speedo and gas gauge don't light up. Everything else works as it should. Any ideas?

Have you checked the fuses? That is where I would start first. If that doesn't fix it then the manual says to: Measure the voltage the White/Black wire terminal (+) and ground (-). There should be battery voltage with the ignition switch ON. If there is no voltage, check the White/Black wire for loose connection or an open circuit.

Well I pulled all the fuses out and checked them. They were all fine. I put each fuse back in it's appropriate place and it worked. No clue what I did, but it worked.