| To undo the sprocket nut......leave bike on side stand. Standing on the wheel side of the rear, put your right foot on the brake, lie your body weight over the seat, and with your right hand hold the socket on the sprocket nut, with your left hand pulling the wrench (I use my torque bar turned right up) feel the nut undo!
You do have to feel it as the nut is not very wide. Worked for me every time............ | 
Threaded Mode