My brother rode for years as well as taught. He hit the smallest spot of loose dirt on the road after dump trucks had been through. He went one way, his bike another. He was giong slower than the speed limit at the time because school was out. I was on the bus when I saw his accident. It takes so little on motorcycles particularly 'crotch rockets' but any bike. You don't have to be speeding it is also road conditions. Other drivers on the road are just as much a problem to motorcyclists as what happened to the son of a friend of ours. A driver turned in front of him causing him. He died from that.