I am looking at a basket case KZ650 on eBay (1978) — Bikez does not list a KZ for 78, but the specs for this Z650 show duals, the photo shows a single — the KZ I am looking at has dual disk in front and cast wheels instead of wire. From what I can see, the differences between the KZ and the Z are cosmetic... beside the dual disks on the front, wheels, the saddle and exhaust seem a little different.