Hi there! I'm in SLC, too. I saw that bike on Craigslist, almost posted it here yesterday, but it was already gone.

Good to see who it went to.
Unless the rear cowl and exhaust were replaced, I don't think that is an LS. There is no such thing as a R65RS. I'm a newb myself, so I certainly could be wrong (but I don't think so).
I'm currently working on getting my R65 (former basketcase frankenbeemer with a 74 R90/6 frame, but mostly 81 R65) road worthy. I bought it last spring and have had to do way more work to it than I expected. I've installed a new rear main seal (the bike didn't have one! Damnedest thing I ever saw), lubed the splines at the same time, installed a HeliCoil in a crankcase stud hole, replaced the carb floats and needle valves, installed neoprene float bowl gaskets, flushed the tank, adjusted valves, replaced the ignition switch, replaced the throttle cables, replaced all fuel lines, replaced the battery, replaced and rewired the oil pressure switch, rigged up a rear brake light switch and wiring (the bracket is missing from the frame so I had to be creative), bled the front brakes (they still need work, the master cylinder leaks and the discs are grabby), rebuilt the petcock, bought and installed the absent crossover tubes (I have now removed and installed the exhaust 4 times), replaced and liberally anti-seized the exhaust finned nuts, bought and painted some side covers, replaced the crankcase breather, replaced many bulbs, and many other things I just can't remember now - not in that order. How's that for a long sentence?

After 3 trips to the DMV, being told something different each time, I finally got it registered just today (never buy anything without getting a title!) I should have gotten this all done last summer, but I got busy with several 60+ hour per week gigs in a row right after I bought it and never had the time. Finally I'm on the road!

Someday I'll start my own thread about my bike and probably copy and paste much of this post, but that will be another day.
The best sites for information are this one, the Boxerworks forum, Snowbum's site, and Duane Ausherman's site. I use Max BMW's fiche for all my part number needs, and occasionally order parts from them. Visit Motorcycle Repair & Rendezvous in Midvale and chat with the boys there, they can get you all the parts you need in under two days and their prices are very reasonable (take your part numbers with you that you got from Max's fiche, it makes things go smoother). I'm not a fan of Accolade (formerly BMW of Salt Lake). Never order from Chicago BMW, the slight discount isn't worth the wait, you won't get your parts for months.
I'll be glad to lend you any tools you need.
Let's go for a ride!