if you have a stiff link after rejoining a chain, you generally havent put the pin in the correct distance, either too far in or not enough, check that the connecting pin is sticking out the same distance of either side of the linkplate, if it is, and it's still stiff try flexing the link sideways to loosen it up a bit, and add oil.
if you have a stiff link after rejoining a chain, you generally havent put the pin in the correct distance, either too far in or not enough, check that the connecting pin is sticking out the same distance of either side of the linkplate, if it is, and it's still stiff try flexing the link sideways to loosen it up a bit, and add oil.