Piston, handwritten code 7650

Description A cylindrical metal engine piston—close-ribbed skirt, flat top with machined cutouts at the top skirt, likely for oil control or ring cooling. Label “7650” handwritten on masking tape adorning its upper circumference.

Weight Not visible in photo; typically small iron/aluminum pistons weigh between 200 g and 500 g, depending on engine type.

Highest Price Reference A performance piston (e.g. Wiseco 76.50 mm bore) is priced around US $144 ; some automotive pistons (e.g. CP‑Carrillo racing sets) run as high as US $885 for a set of four .