What process does honda use to harden cranks generally? They do it via nitriding, induction or that other dipping process I can't recall the name of right now?

I'm looking at undersizing my motorbike's crank but if I reharden specs are different to if I say **** it and don't do that. 0.010 or 0.25mm should be ok if it's induction, possibly nitride but not dipping. No idea how model specific they were about doing it, google has been no help.

 

Shotpeening?

 

Shotpeening is rods not cranks lol.

 

Theyre nitrided.

Edit
Motorbike? Dont know. Probably nitrided too. I know b series cranks and probably all their car cranks are nitrided