On this parts fiche the Circlip (22f) is the most specified component.
The Yamaha CRANKSHAFT. PISTON has eighteen products enlisted in the schematic.
Parts such as the Crankshaft. Piston: Piston (0.50mm O/s), Crank 2, Spacer, Piston Ring Set (std) are included in the Ttr90 2001 5hn6 France 115hn-100e2 Crankshaft. Piston parts fiche.