Truth is that unless your parents currently allow/encourage such activities as: base jumping, car surfing or hunting while intoxicated – it’s unlikely that you will be able to find anything more statistically dangerous than a 17-year-old street riding. Perhaps competetive cheerleeding has a higher incidence of neck injury, but you’d need to research that.
I know that when I was your age, my parents were accepting of my having a muscle car (which I paid for), rock climbing 200-foot cliffs without adult supervision and surfing alone. But they forbid motorcycling. Part of the problem is that you rarely hear about or see people injured in these other supposedly dangerous activities, but we have all seen accidents involving motorcycle riders — so it hits home.
I’d be willing to bet that if someday you told your parents that you and some friends were going to ride your motorcycles to Seattle and base jump off the Space Needle, the response would be: “Please ride safe, wear your helmet and watch for crazy drivers… and call us when you get there.”