Motorcycle Engine Accessories Bore 65.5mm Cylinder Assembly For SL230 CRF230 FTR223 230 XR230 The Motorcycle Engine Accessories Bore 65.5mm Cylinder Assembly is designed as a direct replacement for select motorcycle models including SL230, CRF230, FTR223, and XR230.Constructed from cast iron with a ceramic coating, the cylinder provides improved wear resistance and.The inner wall features a performance ceramic composite material layer along with a Ni-SiC composite ceramic film, offering enhanced temperature resistance, corrosion resistance, and self-lubricating characteristics that support consistent engine. This is not an part.All brand mentions are used strictly for compatibility reference.