Re: Mongoose XR-75 MTB Weed Eater Friction Drive
The Ryobis are popular with RC aircraft builders, since they are cheap and plentiful. There are bolt-on prop-mount kits that might work for you, to use with a drive wheel instead of a prop. Hate to tell you, but when that rope frays or when the rope pully clutch is done for, you probably will not be able to use your motor anymore unless you want to tear it all apart and source parts from another one. If you are using direct drive though, you can just pedal start it.
1" roller Dax Friction Drive and Tanaka 3300 with mods.