I just changed the bars on my K75s to RT bars I borrowed of my R80, all was fine but could do with a little longer brake hose to the master cylinder, It does reach but the master cylinder is no longer horizontal, I will get a slightly longer one someday 35mm should be enough, so i guess going the other way would be even easier. Also having recently changed the clutch cable I found I could tape the new one to the old one and pull it through, bottom to top, one good yank was all it took, no need to remove the tank or the fairing.