The Yamaha CRANK - PISTON has thirty-two products enlisted in the schematic.
The Pin,dowel (137) is the lowest priced item on this Crank - Piston schematic.
Parts such as the Crank - Piston: Pin,dowel (137), Piston Ring Set(std), Washer, Spring, O-ring(3kx) are included in the G7s 1970-1972 Crank - Piston parts fiche.