content: Seat belts on motorcycles are a terrible idea. You don't want to be attached to a 300-600lb machine that's only stability is due to the "gyroscopic effect" and only having two wheels.  Bikes can be flipped pretty damn easy.  You also have the fact that a human on the pavement is going to stop a lot faster than a bike made out of metal and plastic in a sliding instance.  With a seat belt you also lose the ability to stand up on the bike and see over traffic to plan ahead and avoid obstacles and make a better decision for safety of efficiency.  Most countries and most US States have laws that require wearing a helmet. Just as car drivers are required to wear a seat belt.