Chain Mail

Since I'm using the back-end of a 1994 Ninja 250 as the frame work for my hybrid adapter, I need to know what type of chain & sprockets to use to connect to my DC motor. So -- I need to calculate what MPH will be produced for a given motor RPM -- so I can choose. Before I do this I need to know the diameter of my wheel, or it's circumference -- aka the roll out

This link will help you do the calculating:

http://www.vmar.com/java/gear.html