6. You see even though the outside rim of the "flywheel" in the form of the Scorpion clutch basket is fractionally lighter than stock, this super stout hub assembly is anything but light. At 8 1/4 pounds, it's over two pounds heavier than the Harley hub. However, this heft is concentrated in the center of the rotating assembly. So, inertia is minimized. Since the clutch is the heaviest (and most unbalanced) rotating mass in the powertrain, other than the crankshaft itself, it helps to keep the weight centralized to the mainshaft.