Riding without a helmet is not universally legal in the US. In the past there was pressure from the federal government on state governments to enact more unive

Riding without a helmet is not universally legal in the US. In the past there was pressure from the federal government on state governments to enact more universal laws about wearing helmets. Now many states only require that young riders wear helmets and a handful don't have any rule. Here is an overview with a map, too: http://www.iihs.org/iihs/topics/laws/helmetuse/mapmotorcyclehelmets http://www.iihs.org/iihs/topics/laws/helmetuse/mapmotorcycle...