This piston is 75,00 mm, must be turned down to your measurements, piston bolt included, not piston rings Cyl.dia STD 72,00 mm. Comp.height 29,30 + 7,20 mm. Piston length 82,55 mm. Piston bolt Dia. 15,87 mm. Length 63,00 mm Piston rings 2,38 x 2,38 x 2,38 mm.