cyrogenic is actually fairly cheap. Theres a very good guy near Emu Plains that does it, including crack testing, xraying etc.

Its designed to increase the hardness of a metal by changing the crystal structure of the metal itself. My gearbox in the RSV4 was cyro treated but now in the new RSV4 gearbox they DLC coat the gears and I suspect modified the dogs/metal/design to improve the durability as the old box has alot of issues.