The tach is in pretty good shape. I was planning on using it on my bike but I decided to use a trail tech vapor. $10 shipped.
(http://i7.photobucket.com/albums/y263/bugpower72/96KatanaTach.jpg)
does this come with a cable and will it work with a gs500f motor?
It's not cable driven. It would have to be wired to one of the ignition coils. I have heard some people use them on race bikes.
the gs500f tach should be electronic, so electrically, yes it will work. will it fit in the stock cluster, don't have a clue
It is smaller in diameter than the GS gauges.