THIS IS THE CAP THAT HOLDS THE OIL SEAL IN PLACE, SOME HAVE TWO AND SOME JUST HAVE ONE ON THE EXHAUST VALVE. 56C @ *INNER SPRING SEAT EXHAUST GUIDE CT90KOto79 ATC90_ALL MOST_CT70'S 14776-028-000 1/20M (R2112)THIS GOES ON THE LITTLE CUP THAT HOLDS THE EXHAUST VALVE GUIDE SEAL IN PLACE. ONLY ONE PER UNIT. R2112 @ VALVE GUIDE SEAL 50/70/90'S ATC/TRX70'S ATC110's_TO_85 1/21M (B22H)FITS ALL Z50'S THRU 1987,, 1982 TO 1987 TOOK 2 EACH, OLDER JUST ONE. ATC70'S 1981 AND OLDER TOOK ONLY ONE GUIDE SEAL. 82 AND NEWER TOOK 2 THESE SEALS WILL WORK ON ALL THRU 83. SOME OF THE NEWER YEARS TOOK 2. BUT MOST OF THE OLDER ONES ONLY HAD 1 ON THE EXHAUST VALVE. THESE WILL ALSO FIT ALL ATC90'S AND 110'S THRU 1985 ALL C70 PASSPORTS TOOK 2 EA OF THESE SEALS B22H