My 7.2 FX is squeaking when I pedal. The sound doesn't have any grating in it, and happens irregularly every 4-6 cycles of the pedals. I flipped the bike over and cycled the chain while listening for the sound, and I narrowed it down to the front chainset and the rear derailleur. The chain is lubed with a light silicone grease and is fairly clean. Do I need to put on more chain lube, or could this be something else? The bike has less than 200 miles.

I can make the squeak happen by pulling on the rear derailleur lower pulley. It almost sounded like the noise was coming from where the pulley assembly connects to the knuckle joint. Is this normal or not?