DOP11159JO2159 Jonsered Cylinder Kit, Gaskets and Bearing for model 2159. This is a quality aftermarket kit that includes cylinder, piston, rings, wrist pin, cir clips, exhaust gasket, base gasket, and pin bearing. It has a 47mm bore. Replaces original part numbers 537 15 73 02 and 503 91 99 71.