Thanks. I should have thought to check there.Couldn't find anything from Kawasaki but I found an online catalog from jtsprockets that mentions this.
The Z125 was listed under 43 Teeth and I assume the Pro has the same amount.
Front Sprocket 14
Rear Sprocket 43
So, that gives the Z125 a really low gear ratio of 3.07 as compared to the Grom's 2.27.
Should mean the Z will have much better acceleration but lower top speed. That's a trade-off I could live with.