A chain or belt drive assembly, including: a first sprocket with: a first plurality of radially outwardly extending protrusions; and at least one opening passing through material forming the sprocket and wholly surrounded by the material forming the first sprocket; and a second sprocket including a second plurality of radially outwardly extending protrusions, The assembly includes a continuous chain or belt engaged with the first and second pluralities of protrusions; and at least one pendulum mass assembly including: a first pendulum mass disposed on a first radial side of the first sprocket; second pendulum mass disposed on a second radial side, opposite the first radial side, of the first sprocket; and at least one connection element fixedly secured to the first and second pendulum masses and passing through the at least one opening. The connection element is displaceable within the at least one opening in radial and circumferential directions.