California is one of the states that requires all motorcycle passengers and motorcycle drivers to wear a helmet.
The same law also applies for non-motorized vehicles like a bicycle. For a list of state-by-state helmet laws see this post from Consumer Reports. For California specifc laws and codes check the Bikers Rights site.
If you were not wearing a helmet in an accident - you cold risk not getting medical treatment or compensation.
Motorcycle Accident Medical Costs
Medical costs following an accident are high, especially if you injured your head. The injuries that you suffer can be long-lasting and expensive in rehabilition.
Medical experts will be able to tell if you were wearing a helmet based on the type of injuries you suffered.
Not telling the truth about this in court can get you in real trouble. Even a good lawyer may not be able to convince your insurance company that they must pay for your medical bills if you have broken the law.
However, if your lawyer can prove that another party was responsible for the accident, you may still be able to claim compensation, even if you were riding without the required helmet.
What Type of Helmet is Needed? If you are motorcycle rider, your helmet should meet the standards set by state law. Wearing a helmet which does not meet guidelines or failing to wear a helmet at all may result in a fine besides a serious injury.