Piston Kit - 53.94 mm - Yamaha YZ125
Piston is heat treated with a T-5 hardening and tempering cycle
Piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life
Gravity-cast aluminum alloy (not forged) with 18% silicone content
Cast OE replacement piston
Kit includes piston, rings, wrist pin and circlips