Hi all, We don't see all that much talk about the early BMW K bikes around here, probably mostly because there isn't a K-GS. Well, I've gotten the fix-it-up bug, and am looking for something I can tour on that I can also work on. Everybody loves the R airheads, but what about those Ks? I keep hearing that they are bulletproof, but that assumes that they run well in the first place. What if it's a little tired and neglected, how much of a pain in the ass is it to rebuild, compared to an airhead? Parts costs and availability? Also, what about the fun factor? Do the Ks feel much more top heavy? What about the power band (I know there's more power overall)? And what about aerodynamics and comfort? Is the K100RS comparable to the R100RS? And the K100RT to the R100RT? Two-up? Thanks!