Tightening the chain?

[Quick281]

I tried to tighten the chain the other day while doing a variety of other things to my bike. I was sure to make sure that it is evenly matched on each side of the swing arm but I fear that I may have over tightened it.

I am going to loosen it up today but I was wondering if there is a sure fire way to know how much slack is good for the chain. I am probably over paranoid about slack in the chain and therefore tightened it when I didn't need to.

I noticed that it was making a loud zipping noise and seemed to make an odd vibration at about 10 mph when slowing down.

I was out of town all weekend so I haven't been on the bike or able to work on the bike but I was thinking about spending the day trying to get everything back to where it was.

Lesson: Don't fix what isn't broke.