One Way Start Clutch Bearing Set constructed from forged steel for enhanced strength and function.The set includes 16 beads that are hardened and ground to improve and smooth engagement during startup.Designed with a reinforced roller structure for increased under conditions.This bearing is built for direct replacement and requires no modifications, allowing for straightforward installation on compatible models.machining proper fit and consistent with the motorcycle's starter clutch system.Certified under ISO9001 standards for quality assurance through external testing.Suitable for use on select sport motorcycle models from 2003 to 2006.This is a replacement part from a third party.All brand/model references serve only to show intended compatibility.