The most reasonably priced component used on the Ys240tb Snow Blower 1990 Crankshaft - Piston is the Circlip (22f).
This CRANKSHAFT - PISTON assembly utilises two Bolt, Connecting Rod(s) - the highest specified component.
A sample from the products for the Crankshaft - Piston include: Connecting Rod Assy, Piston Ring Set (2nd O/s), Bolt, Connecting Rod, Piston (0.50mm O/s).