Motorcycle Main Countershaft Gearbox Shaft for YongYuan 350 YY350 YY350-6A YY350-9A 350cc Engine Sets of Teeth YY 350 Specifically built for compatibility with YongYuan 350 models including YY350, YY350-6A, and YY350-9A, the gear matches specifications for precise fitment.Its dimensions are 10 cm in length, 10 cm in width, and 10 cm in height, allowing installation without modification. This is an aftermarket spare.Brand and model mentions do not imply manufacturer association.