There might not be a spec. I adjusted my pedal free play to about 3" at the top and ended up smoking a bearing and tearing up the pp fingers. It only takes 1/16" in the wrong direction at the t/o bearing to do damage. With the pedal out, the bearing is not supposed to ride on the pp fingers. PERIOD. Adjust it right down below and the free play will be what it is. It all has to do with pp finger height and how good or worn your linkage is.