We have 2 powerheads to pick from which is the block w rotating assy
Oem part numbers 12000-zw1-L00ZA
130111-ZW1-000 std piston ,13201-PLM-A00 connecting rod w bearings, 13310-ZW1-L00 crankshaft
Can provide more pics and info. Local pick up welcome. Will ship. Call or text for info
8282426434