Wiseco 1.00mm / .040" oversized 76.00mm bore top end kit. Includes (2) pistons, (2) sets of rings, (2) pins, (2) pairs of C-clip, (2) top end bearings, and (1) top end gasket set.
ITEM FITS:
550cc Twin Cylinder
1989-1991 550 SX
1982-1988 JS550, JS 550
(1) WK1013