S&S Cycle SS320-0352 4-3/8" Stroke Flywheel Assembly for Twin Cam Dyna 07-17/Touring 07-16This 4 3 8" stroke 8 1 2" diameter flywheel assembly replaces the original flywheels 2007 '16 HD big twin engines, when using stock pistons. Wrist pin end of connecting rods is tapered like stock rods. Sprocket shaft has the bearing race pressed on and is compatible with stock roller sprocket shaft bearing. Flywheel assembly is three piece design. Pinion and sprocket shafts are forged as part of the flywheel. The only joints in the assembly are where