From inside (document excerpt):
10- PARTS LIST No.Parts No. 9SGEB-05-20 9SKKB-04-10 Description SCREW SCREW CAP GASKET CYLINDER CAP GASKET PISTON RING PISTON RING WASHER ROLLER PIN, PISTON SEAL CLY CASE ASS’Y CLY CASE, LEFT PIN CLY CASE, RIGHT SCREW BEARING CRANK/ROD ASS’Y GASKET RING SEAL SCREW WIRE NUT SCREW COVER, MESH SPARK ARRESTER MUFFLER ASS’Y BAFFLE SCREW No.