The joy of rebuilding freewheels
One of the parts most often screwed up on dumpster bikes are the freewheels. And, older 5-speed units are difficult to find, and not getting any easier as time goes on. So, I've been collecting any 5 and 6-speed clusters I find, rebuilding them, and keeping them in a box. You never know when you'll need one of those vintage things. And when you do, having it cleaned, greased, and ready to go saves alot of time.
Recently, my search has yielded a pair of rare finds - two straight-block, 5-speed clusters (I guess everyone else calls them "corncobs"). You don't come across these everyday. They would be perfect for an older racer (with 120mm spacing) that has a shot cluster. Or, a single speed conversion that would allow fine tuning of the gear ratio.
On the left is an Atom, 14-15-16-18-21 The right is a SunTour Pro-Compe. 14-15-16-17-18
It takes a little bit of work to disassemble, clean, lube, and get back together. But I think they are worth it. And, when work is slow, it keeps me occupied!