There are a few things that can really make a difference when resurrecting an old bike. I kind of go for the "make ride-able again classification", and not Restoration. That means replacing with what ever I have on hand things that are broken. As far as making the bike lighter in weight I change out solid steel seat posts and of course go for aluminum wheel sets. I also commonly replace steel stems and bars and cottered cranks. So what do I keep? The frame, brakes, shifters, derailleurs, and some times the pedals. Do note that the first priority is to get the bike rid-able. Of course this is just a way and not the way.
Doing an old bicycle "Restoration", that's a whole nuther bailiwick...
Originally Posted by
eldercycling
...Ultimately I will sell the completed bikes and need to make my money back but I am not interested in making much of a profit if any...
Well everyone knows your supposed ta fix um up and keep um... Right?