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Oil tank replacement cap
Replacement filler cap, fits 1970 thru 1984 FL, 1980 thu 1986 FLT, 1971 thru 1985 FX & FXE, 1982 thru 1983 FXR, 1970 thru 1978 XLCH and 1979 thru 1999 XLH Sportster and most custom oil tanks with side-fill (OEM 62644-84T).