I'm not sure the guard will ever totally work with that kit.
It matches the style well, but ultimately breaks up the flow of the body kit. This is because the straight lines of the guard, particularly the top edge, clash with the smooth arc of the body.
It also disrupts the wave shaped negative space created by the leading edge of the body and the back edge of the fender. The frame, for example, enhances that negative space by following similar lines.
You may have more pleasing results with a round chain guard that attaches only to the sprocket. Or some other mostly curved guard that fits entirely within the space.