Speaking of wheels interchangeability...

Speaking of interchangeability...

I've come into a second KZ650B, and it looks to be a late 1970s model--and it's just crying out to be lowered! I have a complete KZ440 wheel, a mag, with axle and brake. It's a 16" replacing (I hope) an 18" wheel. Both have drum brakes. Is this going to be an easy swap, or is there something I should know? And will the KZ440 sprocket work alright or do I need a new KZ650 sprocket (the KZ650's has a bunch of teeth missing).

Also got a Honda CB750 for nothing, just haul it away. I would have hauled it, but since it started right up I just attached a plate and rode it home. I'm not sure of the year, but it's a dual overhead cam.