I like the 850!
I had a project-bike '77 750 not long ago. Got it for next to nothing, and it needed almost everything, mechanically. I rebuilt the carbs and finally got it running, and it smoked worse than any two-stroke I ever owned! Of course, it had 60K miles on it, so.....
But, it had the (as I later learned) infamous problem of jumping out of second gear. Had it bad, as it wouldn't even stay in 2nd at all. Whoever put all those miles on it must've just shifted right on thru from 1st to 3rd...
I finally gave up on 'er and parted it out on flea-bay. Feel kinda bad about that, even now.
Anyway, yours are looking good! Looks like nice weather that day, too!
Enjoy 'em!
Kirk