Originally Posted by
T-Mar
snip . . . Significant improvements can be made to friction shifting by installing a HyperGlide compatible freewheel or cassette and chain.
+ 1 but I tend to run suntour winner freewheels; they shift pretty well but not as well as a modern freewheel and/or cassette. Shimano makes modern freewheels but their selection of sizes is limited; IRD has a good selection of sizes but they are pricey.