This is part of the Ball Lift assemblies, both Kicker and PBL. The part bolts to the Upper Yoke & Pulley assembly and rides on a roller connected to the Tube and Support Assembly. This allows the Yoke assembly to move downward (compress) as a ball is being lifted by the belt. The area that the roller rides on wears over time allowing the Yoke to have too much side to side rotationCompatible with: XLi EDGE, 90 XLi, 8290 - 90 XL, 8270, 8230