Scooter Engine Accessories Cylinder Kit Bore Diameter 38mm For YN50F 4ST YW50F YW50FX BX50N BX50S CE50D CE50 Upgrade scooter engine performance with the Scooter Engine Accessories Cylinder Kit.Designed for YN50F, YW50F, YW50FX, BX50N, BX50S, CE50D, and CE50 models, this kit serves as a direct replacement for existing parts, allowing straightforward installation without the need for modifications.The cylinder features a bore diameter of 3.8 cm (38 mm), precise fitment for compatible engines.The cylinder is constructed from cast iron with a ceramic coating.This performance ceramic coating consists of a Ni-SiC composite ceramic film applied to the inner wall, providing enhanced temperature resistance, corrosion resistance, and self-lubricating properties.These characteristics help reduce friction and wear, supporting engine over extended use.With a displacement of 50 ml, the kit is engineered for and long service life.The kit includes a cylinder, piston ring, gasket, tubing, and oil filter, offering a complete set of components for engine maintenance or rebuilds.Suitable for multiple model variants, this cylinder kit supports improved engine efficiency and sustained performance for compatible.Compatibility Note: This is a third-party part.All brand/model references are for fitment purposes only.