Parts such as the E-11 Crankshaft - Piston: Ring Piston(0.25), Key,woodruff25x18, Piston 0.50, Piston 0.25 are included in the Xr350r 1985 (f) E-11 Crankshaft - Piston parts fiche.
eleven components are listed in the schematic for this Xr350r 1985 (f) E-11 Crankshaft - Piston .
On this parts fiche the B/brg Rad N/com is the most specified component.