Yeah, you're both right. If I'd been zoomin' down the street, it could have been ME that had to be hauled home along with the broken bike. I noticed that the red frame was not of the best build quality, yet I chose to motorize it because I didn't want to un-friction-drive the black Schwinn frame. The Schwinn is heavier, and more sturdily built. The down-side to that is the fact that I DRILLED through the frame.
How can I reinforce those holes? Maybe I could weld some flat bar to each bar?