Can someone help me understand the basics when putting together a set up? The minibike kit I'm looking at (AZUSA) comes with a 72 tooth sprocket. I'm buying the motor from NR-Racing. Neither of these guys sell clutches. The guy at NR-Racing recommended a 12 or 13 tooth Max Torque clone clutch from APS Karting. My question is how do I figure out the optimal number of teeth for the clutch and sprockets. Thanks a million.