Compression Ratio: STD, Cylinder Bore: 47.50mm, Piston Diameter: 47.45mm, Displacement: 85mm

• Gravity-cast aluminum alloy (not forged) with 18% silicone content
• Cast OE replacement piston
• Top end kit includes piston, rings, pins, circlips, top end gaskets, and wrist pin bearing
• The piston is heat treated with a T-5 hardening and tempering cycle
• The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life