Pointers with the ZX-12R, check the instructions careful for assembling the rear end of the fairing above the tail-light.
4 parts are involved but only 2 need to be glued together, the cross-spar will end up on the rubbish heap. DON'T cement that one into place, neither cement the rear seat cover into place.
You might want to assemble/putty/paint those in place, it is not a very strong joint and sanding, etc might snap it apart again if you are not careful.
Clear Plastic tends to be harder and a bit more brittle.
Also the lower fairing will need a bit of wiggling when putting it on.