twenty-eight components are shown in this Cr250r Elsinore 1996 (t) Australia Transmission exploded diagram.
On this parts fiche the Washer,spline25mm is the most specified component.
A sample from the products for the Transmission include: Gear,countershaft, Bolt,ubs,8x33, Washer,spline25mm, Washer,25.2x30.