Phoenix Motorcycle Accident Lawyer, Chris Zachar of Zachar Law Firm answers your personal injury questions. Visit http://www.zacharassociates.com to live chat with our support staff 24/7, or call us directly at 602.494.4800 to schedule a FREE no obligation consultation. Get answers to your questions: There is no law or requirement in Arizona if you are an adult to wear a helmet while riding a motorcycle. However if you suffer injuries in an accident that could have been prevented if you were wearing a helmet, the law could deny you any recovery for those injuries as a result in failing to wear a helmet.