Has anyone installed the coupling axle from a post 97 cat on a pre 97 cat to provide front to rear coupling?

you would have to change the slide rails on a 97-98 cat to use the cat coupling kit. your only option for a 97 is ad bovoin coupling kit. Installed them on a 97 zr 580 and 98 zr 600 works great.

I am talking about the aluminum cross brace in front of the rear arm. This provides front to rear coupling.