Well on the minimoto I got the engine from it had an 8t drive sprocket and a 50ish t rear sprocket which gives roughy a 6:1 drive ratio. I was thinking that I should maybe half it and go for a 3:1ish as the won't be thee weight of the driver so maybe a 13t pinion bevel gear and a 43t diff gear. Maybe that would be optimal torque to speed ratio. Still nothing certain though might get a few bevel pinions and try them out. Thanks for the help though