I show how to disassemble and re-assemble a freewheel from a bike wheel. I also clean and lube the freewheel parts. I didn't replace the bearings. I just cleaned them and reused them. But if they show wear or damage, they are not too expensive to replace. The bearings in this freewheel were 1/8" bearings. I think that is the most common size in freewheels. I lubed the parts with marine grease.
If your freewheel is not working well, try cleaning and lubing it before taking it apart:
Some of the tools used were:
Park Tool SPA-2 Pin Spanner:
Park Tool Chain Whip:
Dualco Mini Grease Gun:
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