A synchronous rear belt drive system for belt driven motorcycles and a method of altering the final drive ratio of such motorcycles utilizing the present rear belt drive system is disclosed. The controller also divides the desired fuel quantity between the three shots. The first input end is disposed collinearly with the first central axis, and the first output end is disposed at a radially offset distance from the first central axis. In addition, by connecting the circuit having source followers to the output side of a signal line driver circuit, it can be prevented that luminance unevenness of a striped pattern is recognized in a display portion of a semiconductor device. The recommendation platform then causes, at least in part, a recommendation of the one or more content items to the at least one device based, at least in part, on the popularity information.