Some items from this specific schematic: Ring Set,piston, Rod,connecting, Pin, Crank, Key Word Ruff.
This E-10 Crankshaft - Piston diagram displays the required parts for the C90z2 General Export (kph) E-10 Crankshaft - Piston.
On this parts fiche the Roller, 2.5x10 is the most specified component.