Motorcycle Engine Accessories Cylinder Cylinder Diameter 74mm For YBR250 2007 2009 Item Type: Cylinder Kit Material Composition: Cast Iron with Ceramic Coating Compatible Model: YBR250 2007–2009 OEM Number: 1S4-11311-00-A0 Special Features: Performance Engine Component Certification: ISO9001 Certified This motorcycle engine cylinder is designed for use with YBR250 models from 2007 to 2009.Constructed from cast iron, the cylinder features a ceramic composite coating applied to the inner.The ceramic particles integrated into the bore wall measure approximately 0.3μm in diameter, contributing to a tight fit and reduced wear.A Ni-SiC composite ceramic film layer is included to enhance resistance to abrasion and extend service life.The coating technology improves temperature resistance, corrosion resistance, and self-lubricating characteristics, supporting engine over extended distances.This cylinder kit serves as a direct replacement for components and is suitable for performance-oriented engine builds.It is compatible with standard engine configurations and supports function under varied operating conditions.