Yamaha - Gear assy, starting motor - 6BG-81807-00-00Yamaha Starting Motor Gear Assembly Starting System Component 6BG 81807 00 00 Overview When the starter system isnt engaging the way it should, this gear assembly is often part of the problem. It works with the starter motor to transfer motion and get the engine turning over cleanly. If its worn or damaged, youll hear grinding or feel the engine struggle to crank. Ive seen starting issues disappear right away after replacing a worn gear assembly like