Okay quick update. Removed tire, broke bead, lubed tire and tried to re-seat the bead. I didn't hear an audible pop, but no air seemed to be leaking from around the tire. Should I remove again and try to re-seat until I hear the pop? The bead lines looked a lot better than before but still not quite perfect. I reinstalled the wheel onto the bike, and still noticed some wobble. Debating whether or not to take it to a shop so that they can check that the rim is true and properly seat and balance tire. I'll be out of town this weekend and won't have time to tinker until the first of next week. I guess that'll give me the weekend to decide whether or not I want to wuss out

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HOG & SF- I brushed on a bunch of tire lube, maybe I should have used more? Or it just didn't seat? Do you pull the tire to clean the rim? There was some buildup that may have inhibited from seating correctly, I may try to pull tire clean the rim a little better and re-seat.
UK- I've found a few places that have the cables here's one on amazon
https://www.amazon.com/Yamaha-341-83560-01-00-TACHOMETER-CABLE-341835600100/dp/B00AJQJNYY assuming the '82 and '83 used the same cable. Ebay also has used ones but not sure how much life they'd have in them. I found a NOS tach on ebay for $140 and haven't been that desperate to pull the trigger yet lol. I've had a blast on the bike so far. I've replaced fork seals, rebuilt front caliper, new brake lines (old lines were the originals from '82

and my were they spongy), replaced master cylinder, switched out to LED lights, and maybe a few other small things that escape me. Did you replace your rear mono shock at all?
Thanks again for all of the information!