Thanks, Yinz and all. I'm so stoked about the whole thing. Unfortunately it caused me to spend more than I really wanted to right before Christmas, so I sold my triple yesterday, but I wasn't really all that into it anyways. I'd rather have an RD or CB400F than the S3, to be honest.
When I got the Beemer, the wiring in the headlight was a bit of a mess due to the previous owner's removal of the touring fairing. I was able to get that cleaned up the other night and got the headlight to work as it should. I didn't realize these bikes had a "flash" setting on the headlight, as well as off, low beam and high beam. Kinda neat. I'm not sure the headlight I have for it is correct, though, as it really doesn't want to mate up easily with the bucket. That, or else I'm missing some hardware.
Still missing front signals (ordering this week), but once those arrive I suspect they'll work fine, assuming the flasher is good.
Since I know the bike runs, but it won't be running again for a bit, I went ahead and drained the tank while I was in the garage working on it.
Plans for the next couple weeks are to clean up the front end. Steel wool to the rims and spokes, soda blast and paint the front hub and fork legs, new front tire, new brake shoes, fork gaiters and seals, change fork oil, new grips and cables, new rubber trim rings for the gauges, clean up or replace rusted bolts, etc. Also going to repaint the Krauser cases and hit the insides with some bed liner.