Material Type: Nodular Cast Iron Size: 78mm Diameter Certification: ISO9001 Model Compatibility: 250 SX-F, XCF, XCFW : Kit Configuration: Piston Rings Set The Motorcycle Engine Parts Piston Rings Kit is made from nodular cast iron and designed for use with 250 SXF, SX-F, XCF, and XCFW models.The rings have a bore size of 78mm and are engineered to fit standard specifications.This kit includes a complete set of piston rings intended for direct replacement of components. manufacturing consistent dimensions and function within the engine cylinder.The rings support effective combustion by maintaining compression and heat loss during.Designed for durability under demanding conditions, they contribute to sustained engine performance. This set is compatible with part numbers 79030507000II, 79030207000II, and 77730007100II.Installation requires no modifications and follows standard procedures for piston ring replacement. This is a compatible aftermarket component.Brand names are cited solely to show which devices it works with.