The Haymaker
Veteran Member
The most comprehensive study of fatal motorcycle accidents was the Hurt study in California in 1981 (it doesn't seem possible it was almost 30 years ago). I really recommend that you read it. It is fascinating. They looked at the accidents from every possible angle (e.g., did the rider have tattoos). It is a long and detailed report with many tables. I am sure it can be found on the internet.
Summary is HERE.