An Al\u2014Si based brazing material is formed on one surface of a core material, and a cladding material is formed on the other surface of the core material with a cladding ratio of 6 to 30% with respect to an entire thickness thereof. A headlight line defined by a top surface of the headlight unit and a fuel tank line defined by a top surface of the fuel tank unit together extend along a fixed curved line in a side view of the motorcycle. The architecture enables implementation and management of a full range of non-judicial dispute resolution procedures between two or more adverse parties to a dispute.