FITS : ALL S90 CM91 CL90 SL90 CT90K0 TO CT90K4 ATC90'S WITH A ENGINE SERIAL NUMBER'S SMALLER THAN 1113934 OR ABOUT 1971 AND OLDER 313i @ NEW TYPE (OR_OLD) OHV 90CC BIG BORE HEAD GASKET 1/21L (335T)FITS THE FOLLOWING ORIGINAL ENGINES: CT90'S K5, K6, AND 1976 TO 1979 ALL YEARS OF ST90'S ATC90'S WITH A ENGINE SERIAL NUMBER'S LARGER THAN 1113934 OR ABOUT 1972 AND NEWER 54.60MM ID 64.20MM OD .032" THE POINTED GASKET REPLACES THE NOTCHED ONE YES IF YOU NEEDED TO GET THE OLD TYPE HEAD GASKET JUST GRIND OFF THE POINTS AND BINGO !! 335T @ UNIVERSAL BIG BORE HEAD GASKET 335T