This one-way starter clutch bearing gear assembly is compatible with engine models 821 and 2017.It includes components corresponding to part numbers 17310291A (gear), 27610901A (starter clutch), and 70140471A (beads).The assembly is constructed from strength steel and features a hardened and ground roller design for engagement.Each unit undergoes functional testing prior to shipment.Designed as a direct-fit replacement, it supports smooth power transmission from the starter motor to the engine crankshaft during ignition cycles and is suitable for motorcycle maintenance and repair applications.