Originally Posted by
Lazyass
Buy a Sunrace freewheel with ramped teeth for 15 bucks. Shifting is a hundred times better, especially with friction shifters.
+1 this. Modern freewheels with profiled teeth (required for reliable indexed shifting) work noticeably better, even with friction shifting.
N.B. be prepared to replace the chain at the same time, as worn chains often have a difficult time meshing with new sprockets.