Originally Posted by
SwtBadger
No idea, I'll check tonight. I "never" ride off the saddle except when at railroad tracks, excessive road debris or at certain bridges that don't mate with the road well.
Noises are hard to locate if you can't repeat them in the shop. It's worse when they are intermittent on the road. Lots of click/pop noises come from the seat and post. I also had a click I couldn't find so in desperation I took the bottom bracket apart and lubed it and that fixed it.
Take the wheels out of the frame and put a little lube where things interface. Lean on the saddle with both hands and try to twist it around. Turn the bike upside down and lean into the pedals and twist/torque things around. Check the chainring bolts. Lean/twist the handle bars and stem.
Good luck.