What kind of ski you ride ?
I mean, the old 750 (1992 to 1996) does have a bump in the front hull... This bump pushes the waves and make the ski jump. Since the introduction of SxiPro in 1998, Kawasaki changed the front hull by shaving the bump.
Anyway I have a SxiPro myself and I performed this:
1) I extended the rear hull with hand made fiberglass extention 2inchs long.
2) I weld 2inchs extention on the stock ride plate.
3) I put 8 pounds of lead on each side of the gaz tank (Into the foam wich I've cut 2 insert.
I can tell you... This mods changed the ride in waves and on tight turn. My skis sits on rails now
If you need pictures, let me know.