Though you are in the wrong section I'll help you anyways: I had the same problem, with almost the same boat (95 sportster) here is my posting and this can probably help you:
http://www.seadooforum.com/showthread.php?41407-Broke-my-Shift-Reverse-Cable-1995-Sea-Doo-Sportster
http://www.seadooforum.com/showthread.php?41407-Broke-my-Shift-Reverse-Cable-1995-Sea-Doo-Sportster