RK Racing Chain 428MXZ-104 104-Links MX Chain with Connecting Link 428MXZ chains are made for the serious Motocross racer looking for the lightest, strongest Non O-ring Chain 428MXZ chains feature Chromoly steel construction with seamless rollers and bushings, and oversized special alloy pins for added strength All components are heat-treated using RK's exclusive HIT (Heat Induction Transfer) process 428MXZ Racing Chains are the strongest in their class giving you the best Value-Performance rating of any MX Racing Chain in the world today With a maximum tensile strength rated at 5800 foot pounds and weighing in at only 2.13 lbs., the 428MXZ is ideal for professional level 80cc to 125cc Open Class racing