Motorcycle Cylinder Crankcase Cover Rebuilding Gasket for CRF150R CRF150RB CRF 150R 150RB 12251-KSE-671 12191-KSE-671.This gasket set is designed to fit crankcase cover applications on specified motorcycle models.It includes all necessary gaskets and seals required for rebuilding the cylinder crankcase cover.The components are engineered to provide sealing performance during engine.Proper installation prevention of oil leaks and maintains engine integrity.This kit supports routine maintenance or repair work on compatible engines. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.