The State of Tennessee has had a helmet law since June, 2005. The law is listed as 49 CFR § 571.218 from Senate bill 928, Chapter 459.
If there is no helmet law in your state, the cost of motorcycle insurance is the same whether you wear a helmet or not.
2003
Motorcycle rider and passengers are required to wear a helmet in california. It is a good law since chances of surviving a motorcycle crash without a helmet are slim.
1979
Currently Missouri requires motorcycle riders to wear a helmet. In 2009 the Governor vetoes a bill that would have done away with the state's helmet law. Since then the House and the Senate have continued their attempt to do away with the helmet law.
New Mexico law requires that motorcycle riders and passengers under 18 must wear a helmet.
1980
New Mexico law requires that motorcycle riders and passengers under 18 must wear a helmet.
No, Wisconsin does not have a bicycle helmet law, but it is good to wear one to protect your head and your brain from severe damage.
You are not required by law to wear a crash helmet in Florida however i would highly recommend that you do! Florida does not require a helmet while driving a motorcycle. http://www.edgarsnyder.com/auto-accident/motorcycle-accident/helmetlaws/florida.html
If your state requires that motorcycle riders wear a helmet, and you were not wearing a helmet when you had an accident, insurance companies may use that against you to reduce any settlement. If your state has no helmet law, then insurance companies are prohibited from reducing your settlement by federal law.
Helmet is most essential part of motorcycle riding for the sake of rider's safety. Even its illegal in Texas for passenger to travel with none helmeted rider.