I am going to give you a mother's and a nurses view of dirt bikes and motorcycles..One of my sons was extremely athletic. You name the sport and he could do it.Perfect eye to hand co-ordination. I accompanied him once three wheeling and it was fun and we laughed like crazy but it was in a safe flat desert. He went dirt biking in the woods up on a mountain , hit a rock , the bike fishtailed and he slammed into a tree split his helmet in half and somersaulted over the handlebars, landed on his back and broke his femur, had he not been with another fellow he would never have been able to get help it was far into the woods. They tried to pin him couldn't operate because he had deveoped blood clots so he had to lay in traction for a couple of months taking coumadin(a blood thinner)He deveoped further complications the bone wouldn't meld He was then transferred home and had to lay in a body cast in a bed in the living room for six months We had to transport him ouselves after the insurance wouldnt pay for ambulance rides any more to the hospital for x-rays and examinationsTotal cost for us out of our pockets 16,000. and a year lost out of his life He almost went crazy lying there. Needless to say he sold his bike.In the hospital where I worked (surgical floor) I saw young heathly people with one leg shorter than the other from bike complications , faces scarred, bodies wrecked and some people who would not be able to enter their profession because they had put thier lives on hold some temporarily some permanently The orthopedic people had a saying "support the orthopedic department ride a motorcycle. " Not funny but true. Auntie