87-05 kawasaki EX500(GPz) are 280mm, 6 bolt at 150PCD and 5mm thick.
pre-98 Yamaha TZ125/250 is almost direct bolt on. Used one on a 500t front wheel swapped into a cb360 last year. 280mm diameter, 5mm thick, 6 bolt at 80mm PCD.
I use this link for most of my rotor swap searches, and then if it fails I go directly to EBC's stock rotor PDF catalog online.
http://www.eurospares.com/graphics/brakes/mc-front-rotor-sizes.pdf