Yeah lemme know if you have any specific questions on how to build one up if you are going to use a basic centrifugal clutch and that 72T sprocket let me know I'm about to have a barely used max torque clutch, and that tensioner assembly I made for sale/trade. I'm looking for a torque convertor if you know anyone who wants to sell/trade for one.
When I'm 100% done you'll have to come by and check it out in person some time.