This 300MM engine assembly is a compact 49cc power unit designed for motorcycle applications requiring a water-cooled system. It offers reliable performance with efficient cooling to maintain optimal operating temperatures during extended use. Built for durability, this engine is suitable for various small-frame motorcycle projects and replacements. Available at a competitive wholesale price, it represents a cost-effective solution for enthusiasts, repair shops, or small-scale assemblers. The package includes the core engine assembly as specified. Please verify all measurements and compatibility requirements with your specific motorcycle frame and components prior to purchase to ensure a proper fit. Taizhou Jinyi Machinery Co., Ltd. supplies this product directly, providing a straightforward source for this essential mechanical component.