Included in this big bore set  is: 1 - Cylinder Engine Head, (64mm  valves) 1 - Cylinder (47mm ID) 1 - Piston 1 - Wrist Pin 1 - Complete Gaskets Set 1 - Complete Ring Set 6 - Qmb139 Roller Weights,16*13 1 - Oil Pump (42.5mm bolt hole  spacing)