Parts such as the Transmission: Collar,spline 25x, Pin, Shift Fork, Gear,m-3,m-4, Cir Clip,25mm are included in the Cbr400rr 1994 (r) Japanese Domestic / Nc29-110 Transmission parts fiche.
On this parts fiche the Washer,spline,25x is the most specified component.
The Bolt,flang,6x16 is the lowest priced item on this Transmission schematic.