The piston is heat-treated with aT-5 hardening and tempering cycle The piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston life Forged replica piston is a forged OE replacement Replica piston and all rings are OEM replacement Piston kit includes piston, ring, wrist pin and circlips Brand VERTEX Vendor part number 24122B Compression Ratio 13,75:1 Compression Ratio Imperial 13.75:1 Cylinder Diameter 77,00 mm Cylinder Diameter Metric 77.00 mm Displacement 250 cc Engine Type 4-Stroke Piston Diameter 76,96 mm Piston Diameter Metric 76.96 mm Piston Material Forged 2618 Aluminum Product Name Piston Kit Skirt Coating Molybdenum Disulphite Style Forged Replica Units Kit