This is something great. I like how people use old details from cars and try to reuse them in different ways. Building an electric bike is a great idea. I would also like to build such things, but I don't have any education in this domain. For me, everything related to engineering is very complicated. I am contributing to recycling by
selling scrap old metals. I work in a car repair shop, and there are cases when people don't take the old details from their cars. In such cases, we have a junkyard where we sell that details for the recycling of metals.