sixteen components are shown in this Yz400f 1999 5gr2 France 295gr-100e1c Shift Shaft exploded diagram.
On this parts fiche the Pawl, Shifter is the most specified component.
A sample from the products for the Shift Shaft include: Pin, Shift, Pawl, Shifter, Oil Seal (12x22x5-371), Bolt, Flange(6u1).