1150538 XS 1978 .015 OVERSIZE PISTONS AND RINGS Parts on group .015 OVERSIZE PISTONS AND RINGS: Pos. Part No Qty Parts name Comments  . 6694A 2 [6] PISTON AND PISTON PIN ASSEMBLY  . 78811A12 [2] RING, PISTON Parts catalog : BOTTOM COWL AND SHIFT LINKAGE CARBURETOR ASSEMBLY CARBURETOR LINKAGE AND CHOKE SOLENOID CLAMP BRACKET AND REVERSE LOCK COWLING AND FRONT COVER CRANKSHAFT, PISTONS AND CONNECTING RODS