Robert William Hannah is an American former professional motocross racer. He competed in the AMA Motocross Championships from 1975 to 1989, most notably as a member of the Yamaha factory racing team. He was one of the most successful motocross racers in AMA history, with 70 AMA race victories and seven championships.

Yamaha Motor Co., Ltd. is a Japanese mobility manufacturer that produces motorcycles, motorboats, outboard motors, and other motorized products. The company was established in the year 1955 upon separation from Nippon Gakki Co., Ltd. and is headquartered in Iwata, Shizuoka, Japan. The company conducts development, production and marketing operations through 109 consolidated subsidiaries as of 2012.