I've gotten to the point of my project where i need to begin turning the ideas and theories into a list of materials, and have come across my first question. What size of a jackshaft should i get? My two options are 5/8 and 3/4. A chainsaw engine with 6 teeth will connect to a sprocket with ~30-40 teeth onto the jackshaft, and from there a ~9-17 tooth sprocket on the jackshaft to the rear tire sprocket, with ~36 teeth. Would 5/8 be enough to handle it?