Swing Arm Bearing Kit 28-1230Hands down, the most complete line of swing arm bearing and seal kits! Kit contains all of the components required to properly rebuild the swing arm bearing assembly. Needle bearing shafts are made with SCM415 42 bearing steel that has been hardened and precision ground. All metal bushings are case hardened and plated to prevent wear and corrosion. Includes: Needle Bearing Shaft (4x) Needle Bearing (4x)