STD 94mm Air Cylinder Block Kit compatible with DR-Z400 E/S/SM models from 2000 to 201, LT-Z400 QuadSport models from 2003 to 2012, and K3-L2 models for KLX400.This kit includes a cylinder block designed for air-cooled engine applications, intended for use in replacement or performance.The cylinder bore size is 94 millimeters, supporting standard overbore configurations.Components are engineered to meet specifications for fitment and function.Suitable for motorcycle and ATV engine rebuilds where increased displacement or cylinder repair is required.