Guys, I am currently re-reading Behe's 'Darwin's Black Box' and one of his examples stuck on my mind. In page 44 he asked whether we can evolve bicycles into motorcycles by using only random variations and natural selection. He allows for a factory and a blueprint to simulate bicycle reproduction and blueprint (which can be mutated). However, Behe said the motorcycle is an irreducibly complex system and the bicycle cannot be a functional precursor to a motorcycle.
So I challenge my friends evo and cre: If I start with a factory that produces bicycles from a mutable blueprint, what evolutionary steps would be needed to achieve the final product of a motorcycle?