- The screw-in connection is much stronger than the older design. This is especially beneficial to the drum half of the connection. Aluminum drums can easily stand up to big engines.
- The ball bearing has a thrust capacity. It prevents the sprocket from wobbling on the crankshaft which wastes energy and accelerates wear between the drum and clutch discs.
- The ball bearing fits sprockets of all sizes (including #35-9T) and pitches (#35, #25, #219 and #428).
- The bearing has seals that exclude dirt and retain grease.
- Fewer parts. There are no thrust washers, machine screws or external retaining rings.