Parts such as the Crankshaft - Piston: Crank 1, Washer (152-11685-00), Oil Seal(8v7), Brg,cyl-cal Roller 20g Tm are included in the Br250tw 1996 Crankshaft - Piston parts fiche.
The Yamaha CRANKSHAFT - PISTON has twenty-four products enlisted in the schematic.
The Crankshaft - Piston is made up of components including this Crankshaft Assy which is the most expensive.