I was stumped on this one too, I hit up Google and came up with a rare 1987 750. It appears to be a one of two hundred race version of the Paso (Hello Elton?). Looks pretty cool, but no idea what it's actually worth.
http://www.bikepoint.com.au/portal/alias__bikepointau/tabID__5760/ArticleID__118630/DesktopDefault.aspx