Scooter X-Max 125 52mm Cylinder Block Kit For Husqvama SMR SMS TE XRX 125 MBK Cityliner Skycruiser 125cc 4-Stroke This cylinder block kit is designed for use with 52mm bore engines and fits specified 125cc 4-stroke scooter models.It includes all necessary components for cylinder replacement or engine rebuild.The kit is compatible with the Scooter X-Max 125 and other listed models.Installation requires standard mechanical tools and knowledge.proper alignment and torque specifications during assembly for performance.