I don't know about street bikes but after every race the bikes were stripped down and the engines worked on. It is a life style that's for sure. I was lucky to have a father and friends that were part of the CSRA. I grew up with the father of speedway hanging with my family. I learned alot about tracks and the workings. I didn't have a choice. Everything from my favorite, Speedway, to motocross (my sister raced that as well as my brother), half mile, enduro, trials and the list goes on. My whole family rides.