From Motorcyclecruiser.com:
Get a group of motorcyclists talking about crashes and safety, and you will almost certainly hear some of them—popular misconceptions, incorrect assumptions, urban legends, and intuitive explanations about motorcycle safety that turn out to be wrong when you actually check out the facts. The problem is that believing these misconceptions can increase your chances of being involved in an accident or getting hurt when you do crash.
Myth 1: Other Drivers Don't Care About Motorcyclists
Myth 2: Loud Pipes Save Lives
Myth 3: Motorcycle Helmets Break Necks
Myth 4: Helmets Block Your Ability to See or Hear Danger
Myth 5: A Helmet Won't Help in Most Crashes
Myth 6: A Helmet Will Leave You Brain Damaged in an Crash When You Would Have Simply Died
Myth 7: A Skilled Rider Should Be Able to Handle Almost Any Situation
Myth 8: If You Are Going to Crash, Lay It Down
Myth 9: One Beer Won't Hurt
Myth 10: It's Better to Stay in Your Lane than Split Lanes
Read more.