What age do I have to be to ride on the back of a motorcycle
There is no specific age for one to ride on back of motorcycle. It is not recommended for a child ever to ride on the back of a motorcycle. If the child is young enough then he/she need a harness. Read more: http://www.ehow.com/about_6658574_safety-harness-children-motorcycle.html#ixzz1mBSArmmn.
I rode on the back of my grandpas motorcycle when I was 10. So basically, whenever you want to. Oh and btw, no my family isn't a biker gang