The thirty-eight Ks125 1974 Usa Canada Crankshaft/piston/rotary Valve ( component parts are all listed in this schematic.
Some items from this specific schematic: Bearing-needle,ur1412, Crankshaft,r.h, Bearing-needle,ur1412, Washer, Balancer.
With a quantity of two pieces, the Circlip-piston Pin is the most used part in the CRANKSHAFT/PISTON/ROTARY VALVE ( diagram.