[coolhandcountry]

You may have to make sure the spur gear will fit on the trans as well. I think my jato has a 40 tooth jato spur on it. It was run with a 32 pitch pinion with no wear. 15 tooth pinion with 40 tooth spur 40000 rpm 2 speed trans is like 50 mph. That is not fast enough. Or you want faster?