Motorcycle Engine Parts Bore 95mm Air Cylinder Block & Piston Rings & Base Gasket Kit Fits For YZ450F WR450F 2S2-11631-20 Material Type: Cast iron / ceramic CylindernDisplacement: 250cc Model Name: YZ 450 F WR 450 F 2S2-11631-20 No.of Cylinders: 1 Cylinder External Testing Certification: ISO9001 Special Features: Direct replacement of parts 2S2-11631-10 2S2-11311-10-00 This cylinder block kit is designed for use with YZ450F and WR450F motorcycles.Constructed with a cast iron core and ceramic coating on the cylinder walls, it provides increased wear resistance and reduced friction, contributing to improved engine efficiency and performance.The material composition supports stable under varying thermal conditions and offers resistance to corrosion, suitable for diverse riding environments.The kit includes the cylinder, piston rings, and base gasket, providing a complete set for engine rebuilding.It serves as a direct replacement for part numbers 2S2-11631-10 and 2S2-11311-10-00, compatible with YZ450F models from 2006 to 2009 and WR450F models from 2007 to 2011.Installation may require mechanical expertise, but the components are designed for straightforward integration into the engine system.Certified under ISO9001 standards, the product meets established requirements for consistent manufacturing and performance.Features such as the Ni-SiC ceramic film coating enhance durability and operational characteristics compared to conventional materials.This kit supports engine performance while maintaining compatibility with specifications.