Still rolling a Shimano EX MF-6208 6sp (14-24) on my '84 Raleigh Prestige and a SunTour "Perfect" 5sp (14-34) freewheel on a '80 Motobecane Grand Jubile. All original setups (FD, RD, shifters) all running as good as day one. Until recently, the Jubile even had an original Sedis chain.