Re: Sprocket question.
I was thinking of a freewheel rear sprocket too, to eliminate the engine resistance, making it easier to pedal my bike. I got to looked at your idea HybriPed. That's what I was thinking but simpler, maybe just a 1 way sprocket to bolt on the 44t would work. Not sure though.
Maybe some have made this already, searching this site now as I write this down.
So did you solved your problem regarding engine noise you have that you posted in youtube?