I kid you not my brother got a "scooter" at age 15...got past my mom and the secy of state...but engine size, it was a motorcycle. Later, in his hell raising days around 18-21, he got a cafe' racer...back in his "i live with a bunch of guys in a rented house and we drink and party like crazy" days.
His cafe' racer got over 100 mph STAT...all I could do was shake my head and pray....and if that didn't work, I took out life insurance on him as a get-rich quick scheme. He made it through those days, praise the Lord. I just rambled just cuz your post made me remember how scooters can be motorcycles in disguise.