Got the same front sprocket bolt you are talking about on both my ZX12 and ZZR1400 without a bit of 4x2 through the swinging arm. Incredible power for the money.Not convinced. My air impact wrench didn't come close and it is 1/6th of the torque of the breaker bar I used. I know impact helps, so you can't directly compare, but not that much! It probably does a better job than my cheap air wrench, though!