To show that I am fully and certifiably insane, I have begun the transplant. Taking a bland Chinese moped and removing the engine.
And transplanting it on a US made bicycle!
The big challenge is creating an extender from the crank to the pedal. The temptation is to just replace the really nice GT/Dyno crankset with a less substantial one. After all, this it to just provide human power. But I really like the nice GT stuff!
Hey- it's all good tinkering and mechnical fun, the engine is in excellent condition with very little wear on the friction roller.