I looked on the Cruisemount site and they list them from 1998 and on? Could be related to the mounting setup? Go here and talk to this guy He is most likely the one to help you. motorcycle cruise control
Hope it helps. I sure love my cruise.
Oops Cruisemount actually does have cruise setups for Roadking police back to 1996 . Sorry. Just re-checked. The front page says they don't but inside further it states that they do.