An exact reproduction of the Original Equipment 4 Speed Big Twin oil tank for all FX and FL models from 1965 thru 1986. It features triple chrome plating and is inspected and cleaned before shipment. Fitted with the pre-1982 large diameter filler opening, the tank will accept the "in-tank" style oil filter. The side filler/dipstick location makes it possible to add oil or check the level without removing the seat.