572978 Internal retaining ring, pivot shaft swingarm

This internal retaining ring is a small but vital component for the swingarm assembly on 2006 to 2017 Dyna models. It is designed to secure the pivot shaft components within the swingarm, ensuring everything stays properly aligned during operation. When performing a swingarm service or replacing pivot bearings, these retaining rings should always be inspected and replaced if they show any signs of distortion or loss of tension. This MCS replacement part provides the factory-spec fitment required to keep your Dyna's rear suspension assembly tight and secure, preventing lateral play and maintaining the handling precision you expect from your machine.