This insulator will work on 1982 and 1983 passports. It is just a small tad bit thicker, but that will not be a problem hooking up the rubber boot to the backside of the carburetor.
THIS WILL ALSO FIT THE 1982 THRU 1994 CT70'S 82-MUST USE 31L
*ORING FOR 31L INSULATER 91304-GB0-910 20.6_X_1.9 1/20M (R2060)
This insulator O-ring will work on ALL YEARS OF PASSPORTS.