Crankshaft BGM Evolution 52mm Stroke, 105mm Connecting Rod, D=90mm Cheeks For Piaggio Maxi 2-stroke, Aprilia SR125, Gilera Runner 125FX, 180FXR, Italjet Dragster 125 / 180, Piaggio SKR, TPH, Skipper, Hexagon 125 / 150 / 180cc