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

Upgrade your Harley Davidson softail or FX motorcycle with the S&S Cycle Part Number SSC31-6295 oil pump and gear kit, designed for 78-91 model years. This comprehensive kit includes a complete oil pump assembly, mounting hardware, fittings, gaskets, and detailed instructions to facilitate easy installation. The kit features a pinion shaft pump drive gear, oil pump drive shaft gear, and breather gear, ensuring a reliable and efficient oil flow throughout your engine. The oil pressure regulation bypass routes excess oil directly back to the supply side of the pump, reducing foaming and cavitation by minimizing oil return to the tank, which enhances overall lubrication performance. This setup is especially suitable for custom builds or engines requiring a full overhaul, particularly when working with aftermarket crankcases or older engines.
The oil pump is machined with an oil pressure relief bleed-off passageway to prevent pressure buildup on top of the valve, maintaining consistent oil pressure for optimal engine operation. The inclusion of S&S pinion and oil pump drive gears increases potential oil volume delivery by approximately 25 percent over stock components on 1972 and earlier engines, providing superior lubrication capacity. The standard pump cover offers flexibility for various oil system configurations, accommodating multiple feed and return options. The gears maintain the same width as the stock Harley Davidson aluminum pump, ensuring compatibility and seamless integration. This kit is built for durability and performance, promoting engine longevity and reliable operation across a range of Harley Davidson models from 1990 and 1991.
Designed for direct fitment, it ensures a straightforward upgrade path for experienced builders and mechanics seeking to improve oil circulation and engine reliability.

Features:

• Complete oil pump assembly with mounting hardware, fittings, and gaskets

• Includes pinion shaft pump drive gear, oil pump drive shaft gear, and breather gear

• Oil pressure regulation bypass reduces foaming and cavitation

• Machined with an oil pressure relief bleed-off passageway for consistent pressure

• S&S pinion and oil pump drive gears increase oil volume delivery by 25%

• Standard pump cover offers flexible oil system configuration options

• Same width gears as stock Harley Davidson aluminum pump

• Designed for 1990-1991 Harley Davidson FLST Heritage Softail, FXLR Low Rider, and other models

Fitment:
Harley Davidson FLST Heritage Softail Base 1986
Harley Davidson FLST Heritage Softail Base 1987
Harley Davidson FLST Heritage Softail Base 1988
Harley Davidson FLST Heritage Softail Base 1989
Harley Davidson FLST Heritage Softail Base 1990
Harley Davidson FLSTC Heritage Softail Classic Base 1988
Harley Davidson FLSTC Heritage Softail Classic Base 1989
Harley Davidson FLSTC Heritage Softail Classic Base 1990
Harley Davidson FLSTC Heritage Softail Classic Base 1991
Harley Davidson FLSTF Fat Boy Base 1990
Harley Davidson FLSTF Fat Boy Base 1991
Harley Davidson FXLR Low Rider Custom Base 1987
Harley Davidson FXLR Low Rider Custom Base 1988
Harley Davidson FXLR Low Rider Custom Base 1989
Harley Davidson FXLR Low Rider Custom Base 1990
Harley Davidson FXLR Low Rider Custom Base 1991
Harley Davidson FXRS Low Glide Base 1982
Harley Davidson FXRS Low Glide Base 1983
Harley Davidson FXRS Low Glide Base 1984
Harley Davidson FXRS Low Glide Base 1985
Harley Davidson FXRS Low Glide Base 1986
Harley Davidson FXRS Low Glide Base 1987
Harley Davidson FXRS Low Glide Base 1988
Harley Davidson FXRS Low Glide Base 1989
Harley Davidson FXRS Low Glide Base 1990
Harley Davidson FXRS Low Glide Base 1991
Harley Davidson FXRT Sport Glide Base 1983
Harley Davidson FXRT Sport Glide Base 1984
Harley Davidson FXRT Sport Glide Base 1985
Harley Davidson FXRT Sport Glide Base 1986
Harley Davidson FXRT Sport Glide Base 1987
Harley Davidson FXRT Sport Glide Base 1988
Harley Davidson FXRT Sport Glide Base 1989
Harley Davidson FXRT Sport Glide Base 1990
Harley Davidson FXRT Sport Glide Base 1991
Harley Davidson FXS Low Rider Base 1977
Harley Davidson FXS Low Rider Base 1978
Harley Davidson FXS Low Rider Base 1979
Harley Davidson FXS Low Rider Base 1980
Harley Davidson FXS Low Rider Base 1981
Harley Davidson FXS Low Rider Base 1982
Harley Davidson FXSB Low Rider - Belt Base 1983
Harley Davidson FXSB Low Rider - Belt Base 1984
Harley Davidson FXSB Low Rider - Belt Base 1985
Harley Davidson FXST Softail Standard Base 1984
Harley Davidson FXST Softail Standard Base 1985
Harley Davidson FXST Softail Standard Base 1986
Harley Davidson FXST Softail Standard Base 1987
Harley Davidson FXST Softail Standard Base 1988
Harley Davidson FXST Softail Standard Base 1989
Harley Davidson FXST Softail Standard Base 1990
Harley Davidson FXST Softail Standard Base 1991
Harley Davidson FXSTS Springer Softail Base 1988
Harley Davidson FXSTS Springer Softail Base 1989
Harley Davidson FXSTS Springer Softail Base 1990
Harley Davidson FXSTS Springer Softail Base 1991
Harley Davidson FXWG Wide Glide Base 1980
Harley Davidson FXWG Wide Glide Base 1981
Harley Davidson FXWG Wide Glide Base 1982
Harley Davidson FXWG Wide Glide Base 1983
Harley Davidson FXWG Wide Glide Base 1984
Harley Davidson FXWG Wide Glide Base 1985
Harley Davidson FXWG Wide Glide Base 1986