Motorcycle One Way Bearing Starter Overrunning Clutch Kit For TTR125E TTR 125 E TT R125 TTR125 TTR125R 2003 2007 5HH E5517 00 This one way bearing starter overrunning clutch kit is designed for use with specified motorcycle models.It replaces the part number 5HH E5517 00 and fits TTR125 series motorcycles manufactured between 2003 and 2007.The component functions as a starter clutch mechanism, allowing unidirectional rotation to engage and disengage the starter system.It is engineered for direct installation without modification.The kit includes the necessary parts for replacement of the existing overrunning clutch assembly. Compatibility Statement: This is a third-party replacement.Brand/model references serve only as compatibility indicators.