The official Yamaha motorcycle page is located at Yamaha-Motor.com. From the official page, the subpages for its cruiser motorcycles and sport bikes can be reached at StarMotorcycles.com and YamahaMotorSports.com, respectively.
Yamaha is a Japanese motorcycle manufacturer based in Iwata, Japan. Currently the company markets eight different sport bikes under its Yamaha brand name and eight different cruiser bikes under the Star Motorcycles brand name. Originally, Yamaha built its motorcycles exclusively with two-stroke engines; however in 1968, Yamaha introduced its first 650cc four-stroke engine. This paved the way for the wildly popular 750cc four-stroke engines of the 1970s. As of 2015, all of Yamaha's motorcycles contain four-stroke engines.