Funny clicking noise...

[bike4ever]

Do you use clipless pedals? They are often a culprit of unidentifiable clicks.

[SadieKate]

The link on the chain where you re-pinned it. Did you get it good and loosened up? Is it still stiff?

Have you checked your chain ring bolts lately? Just asking. These tend to get ignored (I'm not immune).

[BleeckerSt_Girl]

Does the click always happen at a certain spot in your pedal stroke no matter which gear you are in? If so, then the problem is more likely with the shoe, the pedal, or the crank and axle....not with the chain or gears.

I know this sounds ridiculous...but more than one person has discovered that their mysterious click on their pedal stroke has been the hard end of a sholace ticking against a gear ring on each stroke. Just something to check on.

I just had to change one of my pedals (it's a "regular" bike pedal, not clipless) due to something INSIDE the pedal axle being loose after several thousand miles use. It made an annoying little snap/thunk sound and a snapping vibration every time my foot was at 1:00 starting each downstroke. DH kept saying it couldn't be inside the pedal, someone else said try it, they had had the same problem...and when we finally changed the pedal the problem was instantly gone.

If these things seem unlikely, then ask your LBS to check to make sure your crank is not loose. Unless you know what to watch for, it's not always easy to know what a slightly loose crank feels like.

[SouthernBelle]

I had a clicky sound that turned out to be the sensor for my cyclometer had turned a bit and the magnet was clicking it. Easy fix.