A group of men in China recorded how to wash and dry hair with a motorcycle. One guy operated the bike, with its tire in a shallow pool of water, while another guy lies on his stomach on a wooden pallet. When the wheel spins, the dude’s hair gets wet. That was when man number three applied the shampoo.
They used the bike exhaust to dry the hair...smoky exhaust at that, so maybe your hair won't have that clean fresh smell...but it works! See for yourself!