The amount of weight on the pedals has really nothing to do with the location of the center of gravity. Raising or lowering your body (sitting/standing) and moving equipment around (rack mounted trunk versus panniers for example) will have an effect of course. Applying weight differentially (outside pedal, inside handlebar) creates a torque which must be balanced by a restoring effect. Similarly, using your inside leg on a turn shifts the center or gravity; moving the knee to the inside of a turn moves the center of gravity causing the turn to tighten until the forces are in balance.