Material Type: Aluminium Size: 74mm OEM Code: 1S4-11311-00-A0, 1S4-11311-01-A0 Package Including: Cylinder, Piston, Ring Fit for: YBR250, YS250, XT250 1YB 2007-2015 The 74mm Motorcycle Engine Parts Air Cylinder Block & Piston Ring Kit is designed for compatibility with YBR250, YS250, and XT250 1YB models.Constructed from aluminium , the cylinder block is engineered to support engine function under regular operating conditions.The 74mm diameter cylinder is machined to match specifications, allowing integration into the existing engine setup.The kit includes a cylinder, piston, and ring, components intended to function together to maintain combustion efficiency and consistent engine.engineering supports dimensional accuracy for alignment with standard assembly requirements.This kit suits riders looking to replace or replacement engine components on compatible motorcycle models.The design focuses on functional and adherence to standard mechanical tolerances.ISO9001 certification indicates that the product has undergone external testing for quality management standards, reflecting structured manufacturing processes.This component set is suitable for use in maintenance or rebuild projects by experienced users or professional technicians.