So I've been continually upgrading my '83 z50r that started as a bin of parts a few years ago. This time I've got a set of 10" ct70 wheels, I believe from 1979 with a 35 tooth sprocket. I'm just having a little trouble wrapping my head around the ratios and was wondering if anyone had any suggestions. I've got the stock front sprocket (12 tooth) so I have some room to make that smaller and I have room to put a larger one on the rear too. Ideally I want it to be about the stock ratio so a top speed of 25 or 30 with enough grunt to haul me around.