On this parts fiche the Screw (4h7) is the most specified component.
A sample from the products for the Transmission include: Gear, 3rd Pinion, Gear, 5th Wheel, Washer (5h0), Brg, R-b (7h4).
The twenty-four Yfb250fwj 1997 Transmission component parts are all listed in this schematic.