I had these clicks about 5 weeks ago with a set of FSK K-force cranks. The clicks only happened at certain positions of the pedal stroke. Turns out the metal inserts that the pedals thread into (I use Keo's) unbonded from the carbon crank arms (both sides!) and gave my pedals a little extra float that I did not need.

Check to make sure there is no play in the pedals relative to the crank arms.