So im almost done, i have the engine mounted successfully over the rear wheel, and ive disabled the rear suspension to alleviate any issues with the chain, and ive welded a 36 tooth sprocket onto the rear wheel from another bicycle. I know i need a 40 or 41 ansi chain for the rear sprocket to fit, but i need a clutch. Ive seen the 40 pitch centrifugal clutches and want to use one, but i dont know which one to get (Im using a 196cc HF greyhound if thats relevent). I need one that can handle the load with that gear ratio without melting, any suggestions or recommendations for a good and relatively cheap clutch, or should i just modify the design altogether.