Ok guys just finished this up on my 87 thought I'd share some info with everyone.
The first thing your going to need is a pair of hubs from a Banshee,later years are the best probably a arm 91ish up. Why u say? Well because the early ones use a different set of rotor bolts that don't sit flush with the rotor and they will hit the caliper mounting bracket. You can use the early style hub, but if you do you will need a set of rotor bolts from a newer Banshee and you will have to bore the top of the bolt holes out of the hub for the lip on the newer rotor bolts, and the rotors have a little bigger holes in them too. Also early Banshee hubs have shorter wheel studs so if you have a set of aftermarket aluminum wheels the studs are not long enough to get a flat washer and a lock washer on.
The next thing is this will require a lath, once you get the hubs apart (bearing and seals out ect) the rear bearing bore needs to be made .200 deeper. Once that's done the spacer that goes between the two bearings needs to be .200 shorter. Take it off the the side that faces the big inner bearing not the outer bearing. The bearings have the same od so get yourself a new set of hub bearings and seals for the Banshee hubs press them in and your done no shimming of the caliper required. One thing worth noting is that the banshee uses slightly smaller rotors so the very outside of the pad wont contact the rotor but i don't see this effecting much.
If anyone would like me to mod a set of hubs for them i can do it along with most other machine work I have a fully equipped machine shop. Pm me I'm always willing to help with what i can.
Thanks for taking the time to read through this.
Ben
This is the early Banshee rotor bolt and rotor

This is the later rotor bolts and rotor

The two side by side you can see how much more the early bolts sit up then the later ones





