Scooter 57.5mm Cylinder Kit For Outlook150 Outlook 150cc QJ158MJ 4-Stroke 100080440 This cylinder kit is designed for compatibility with the Outlook150 and QJ158MJ 150cc 4-stroke scooter engines.It features a 57.5mm bore diameter and is engineered to replace the cylinder assembly.The kit includes all necessary components for installation, such as the cylinder, piston, rings, and wrist pin.Constructed for and consistent performance, it supports engine efficiency and power output under regular operating conditions.This part is intended for use in engine rebuilds or performance where improved compression and combustion are required. Compatibility Clarification: This part is not made by the brand.Mentioned models are for reference only.