Pistons Appraisal

Harley-Davidson Engine Cylinder and Pistons

The item displayed consists of one engine cylinder head and two pistons, likely for a motorcycle, specifically a Harley-Davidson. The cylinder head is made of a light-colored, possibly aluminum alloy, given its matte silver-gray finish, and appears to be sand-cast or die-cast. It has a large central bore for the piston, surrounded by six bolt holes for mounting to an engine block. The surface shows some minor scuffs and marks consistent with handling and removal from an engine, but no significant damage like cracks or deep gouges are immediately apparent. There's a visible manufacturing stamp on the bottom flange, which includes the numbers "161303 ACS 413" and "H-D 16503-00", clearly indicating its Harley-Davidson origin and a part number suggesting a manufacturing year around 2000. The inside of the cylinder appears unmarred, exhibiting a smooth, honed surface, indicating that it may be in good, reusable condition or recently reconditioned. The two pistons are also made of metal, likely aluminum alloy, displaying a bright, shiny, machined finish on their crowns and sides. Each piston features grooves for piston rings (which are not present in the image) and a central bore for a wrist pin (which is installed in both pistons). The undersides of the pistons show a ribbed or latticed structure for strength and weight reduction. They appear to be standard, possibly OEM, components. Visible condition includes some carbon residue or discoloration on the domes of the pistons, suggesting prior use within an engine, but no major scuffing or damage to the skirts or ring lands is discernible from this view. The overall quality appears to be consistent with durable, precision-engineered engine components.