Yamaha Drive Sprocket 13 Tooth 93812-13812-00. Overview. The Yamaha Drive Sprocket 13 Tooth 93812-13812-00 is a genuine original equipment manufacturer component designed to provide smooth and efficient power transfer within your engine or drivetrain system. Featuring a 13-tooth configuration, this sprocket ensures proper chain engagement and consistent rotational movement, helping maintain accurate timing and dependable performance.. Engineered to Yamaha's strict standards, this sprocket delive