How timely as this is on my list.
@sixpack577 from the point of making sure to straighten it out first, how much impact can the shaft take as one jams a punch or chisel between the nut and spindle? It seems that everything is at risk of damage no matter which method one uses?
There is a lot of advice out there to just spin it off with an impact like
@Bumblebee iterated. If the shaft is harder than the nut, that would not cause harm, yes? But we do not know?
Do you call this bend of the nut "staking"? Or what is the highly intellectual mechanic's term? I need to know!
Yes, I have heard it called staking.
Rotate the opening to the 6 o'clock position, and put in a punch or flat blade that fits.
The bigger and heavier the hammer the better, that will make it easier.
Knock the 'staked' ends back out where they should be(you will be hammering more downward, vs in).
@Bumblebee is correct that you can spin some off with an impact, but the nut is staked on the Busa and Gsxr shaft to where if you don't knock the stakes out, they can gouge the lead in thread on the shaft as the nut spins off.
The shaft itself(and of course the threads) are hardened steel, and very strong.
And, if you did damage the threads, a small, fine tooth, triangular file will fix them. Just start in good threads, and slowly work your way around and out.
I always hold the basket with clutch basket pliers, inside the basket(all plates out), and use an impact to remove the nut after knocking out the stakes.
For instalation, again hold with basket pliers, and use a torque wrench.
I keep the bike in neutral too.
I never remove the front sprocket nut or clutch hub nut unless the transmission is in neutral.
That prevents any damage to the shift forks.
No impact or basket pliers? You can take a piece of brass or aluminum, and let it jam between the basket gear and the gear that one meshes with.
This obviously jam the gears, and allows you to loosen or tighten the clutch hub nut.
The brass or aluminum is softer than the hardened steel gears, so the brass or aluminum will get chewed up a little, and the gears will be unharmed.
Old school dirtbiker's trick
lol