Back in the dim and distant I remember a couple of people turning up to the start of a race with the bike fixed to a makeshift rack on the back of a motorcycle, one of those a scooter.
I once got a lift home from a clubmate who had a rack for two bikes on the back of his Francis Barnett sidecar outfit. I had to ride pillion because the floor on the chair had given way. We were both still in our racing kit and one of my socks was covered in oil from the gearbox.
Happy days!