kz 400/kz1000 wheels

I need a set of hubs ot build a set of custom rims for my 1000. I found a set of rims from a 400. Are the hubs the same width? brakes etc......

400 are smaller in many ways, axel dia would use 650 on up front hub,for the rear 750 twin,kz900\1000 will work they use a 20mm axel

I'm using a rear 18 inch from a 400 on the front of my 77 1000.

donthekawguy, im assuming your using the rim itself, not the spokes or hub?