. It's an '83 R65.
Slow turns are definitely a bit wobbly though, the steering head probably hasn't been greased for 20k miles if ever. Up on the centerstand the front end's got a significant lock-up going straight ahead. Should I plan on replacing the bearings/races? Or just greasing 'em? Getting that bottom bearing off w/o trashing the dust cover looks to be a pain.
Order a couple of dust covers, they are real cheap. You won't get it off without damage. You only need one, but have one for the next time or bike.

Agree with others, clean out the old bearings, and if they don't look real notched try the regreasing. If they are notched replace them. As someone commented that aren't a major cost. I did my bearings this spring in a few hours, no real problems. ( I drilled the steering head and centre punched the bearings out, but proper tools (Ed Korn) are available for the more fastidious, or a welder works great.)
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A tangent of that fix is needing to replace the oily brake shoes as there's not much grab at all. (There's a decent drip of gear oil from the drum bottom.) Anybody get their shoes resoled anymore? Sure seems cheaper that a $70 set of new ones. Bad idea?? There's a shop nearby w/ a 2 day turnaround for 1/2 the cost.
Hard to find places that re-line shoes anymore, so if you have a place give it a shot. But I understand you should really give them the wheel as well, so they can match the curvature properly. The company I contacted wanted the wheel and final drive, so everything could be properly aligned. (Wasn't practical as cost of shipping out weighed and savings)
If the pads have meat, I would consider Sue's ideas on cleaning them.
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Where to order from? How long does it take a Motobins package to get to the US? Quicker than Chicago BMW would send out it seems. Hucky's? Bob's? Boxerworks?
I like Moto-Bins personally because I can work my way around on their on-line catalogue. It is rare they are out of stock on anything, and stuff arrives to my small town in Western Canada within a week to 10 days. Best has been 4 days.
I have also dealt with Matt at Boxerworks and had great service
Re final drive leak. As Rob commented, clean it up first and find where the leak is coming from first. Either the big seal or the brake rod O-rings.