Motorcycle Engine Parts Block Air Cylinder Kit compatible with models using part numbers 1C3-11311-00, 1C3-11351-00-00, and 93450-16068-00. Designed for use with YZ125 and YZ 125 models from 2005 to 2022. Includes components necessary for the air cylinder assembly, intended to support engine functionality and performance. This kit provides a complete set of parts for replacement or repair of the engine block system. Note: This part is made by an independent vendor. Any brand/model mention is for compatibility purposes only.