Originally Posted by
Maddogatc
I may have to replace my vintage Shimano 600 6 speed 13-25 threaded freewheel. Comes from a vintage 1983 Bianchi road bike with shimano golden arrow components.
I took the old one apart, cleaned and re-greased the 90 odd bearings. Seems to work fine but won't know till I ride it. So if I have to replace it what do i get? See picture below.

[MENTION=251447]ThermionicScott[/MENTION] too...
One advantage of those Shimano freewheels with the twist tooth sprockets is that when they wear out they cane be removed and reversed. It requires the tools to take the sprockets off.
I have a low mileage 13-26 twist tooth Shimano freewheel off of my 1987 Bianchi. PM me if you need a replacement.
If you replace the chain try to find an older style one made for 5-6 speed freewheels. I've had problems with the narrower 6-7-8 speed chains on twist tooth freewheels and cassettes. They hang up on hard shifts and the side plates can twist.
verktyg
Chas.