The piston takes the pressure of the burning mixture and transmits the force through the pin to the connecting rod; this item is sold without rings. The 47.25 mm size is an oversize (larger than the standard 47.00 mm). Brand: YOG. Country: China.
It should be replaced if it is scored or burnt, the clearance in the cylinder has increased, or compression is lost. Choose by the cylinder diameter given in the name; the rings are bought separately.
