Hope this helps!
My brand new bike gave a click/pop sound while pedaling. After hours of troubleshooting, turned out a nut on a screw was too tight on the frame. The screw connects to the pulley system so each turn caused the nut to pop against the frame of the bike. For me, the screw was located under the second "c" in "concept" on the frame. Once I loosened the nut, the noise went away.