# S&S Cycle 78-91 BT Oil Pump and Gears Kit Kit Includes:Complete oil pump assembly, Mounting hardware, fittings and gaskets, Instructions, Pinion shaft pump drive gear, Oil pump drive shaft gear, and Breather gear. - Oil pressure regulation bypass routes excess oil directly to the supply side of the pump & reduces the amount of oil returned to the tank, less foaming and cavitation - Ideal for scratch built applications where the builder is starting out with aftermarket crankcases, or older engines where a complete overhaul is required - Machined with an oil pressure relief bleed off passageway & relieves pressure build up on top of the valve to maintain consistent oil pressure - S&S® pinion and oil pump drive shaft drive gears increase potential oil volume delivery by 25 percent over stock on 1972 and earlier engines - The standard pump cover allows total flexibility for oil system configuration with a number of oil feed and return options - Same width oil supply and return gears as the stock HD® aluminum pump This Part Fits: Year Make Model Submodel 1986-1990 Harley-Davidson FLST Heritage Softail Base 1988-1991 Harley-Davidson FLSTC Heritage Softail Classic Base 1990-1991 Harley-Davidson FLSTF Fat Boy Base 1987-1991 Harley-Davidson FXLR Low Rider Custom Base 1982-1991 Harley-Davidson FXRS Low Glide Base 1983-1991 Harley-Davidson FXRT Sport Glide Base 1977-1982 Harley-Davidson FXS Low Rider Base 1983-1985 Harley-Davidson FXSB Low Rider - Belt Base 1984-1991 Harley-Davidson FXST Softail Standard Base 1988-1991 Harley-Davidson FXSTS Springer Softail Base 1980-1986 Harley-Davidson FXWG Wide Glide Base ## Details - **Price:** 1010.76 CAD - **Vendor:** S&S Cycle - **Type:** Oil Pumps ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1010.76 CAD | In stock | ## Images - Photo - Primary - User 1 --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-78-91-bt-oil-pump-and-gears-kit) > Updated: 2026-07-01