Loosen the stem bolts and try tightening the top cap while the stem is loose as this will push down the all the rings and close the gap. If you fully tightened the stem prior to the top cap, when you tighten the top cap, this will put pressure only on the rings that are on top of the stem and not the ones below it, including the last one (with the FSA logo).
Last edited by princo; 05-26-20 at 12:34 AM.