removing front sprocket

[Cb Boy]

I reckon CB if you can break the box doing that then the 180 Hp + going thru that box is going to break a damn lot more then

You're probably right..... But usually the power coming from the motor is through a clutch, or at least the gearbox is unloaded by rolling slightly off the throttle... (when changing gears of course)
It just doesn't sit well with me, giving a short sharp blow with a hammer on a breaker bar when that force is being taken directly by the gearbox

It's kind of a moot point anyway, as having a bike in gear will not be enough to stop the output shaft rotating with that kind of force on the nut, as the motor will just turn over.... hence why I suggested a block of wood through the back wheel, which negates the need for having it in gear at all