What ratio are the KZ gauges?

Been searching around for some mini-gauges. Ran across a guy on another forum selling a nice set, but what ratio are the KZ gauges? Specifically, the tach, but the speedo, too.

These would be for my KZ250 single, if that makes a difference.

Some gauges are electronic, but I suspect that for the mechanical speedo's the ratio varies from one model to the next. Seems like the tach would have to be 1:2 since cams always rotate at 1/2 the speed of the crank.

Except, of course, in two-strokes.