This cylinder kit is designed for compatibility with ZS174MN-5, NB300, and NB350 engines.The set includes a cylinder block, piston, piston pin, piston rings, and gaskets required for engine assembly.Constructed from aluminum , the cylinder features a 77mm bore size and utilizes a 16mm piston pin.The included piston rings are RIK competition style components.This kit serves as a replacement part to restore engine specifications.Total weight is approximately 2103g.Please verify your motorcycle model and measure existing parts before purchase to ensure proper fitment.Minor dimensional variations may occur due to manual measurement.