fits  73-91 Big Twin (NU)

Fully CNC machined to maintain close tolerance and strict quality control. This pump is not equipped with a rear chain oiling provision. Offers several options for oil line placement. All S&S billet pumps comes complete with everything you need to replace the stock pump and include mounting instructions. Machined with an oil pressure relief bleed off passageway & relieves pressure build up on top of the valve to maintain consistent oil pressure. 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. Note: There may be more differences in Harley-Davidson crankcases than you might think. Plugging or drilling a hole is sometimes necessary. S&S offers a drill jig as MCS 518150. This is a special tool that is mounted on the crankcase and used as a guide to help you drill holes correctly.

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Home > Parts > Engine > Lower End > Oil Pumps > S&S, billet oil pump. 73-91 style

fits  73-91 Big Twin (NU)

With top feed & return oil lines. CNC machined from billet 6061-T651 aluminum, with a clean custom appearance. The Jims Flow-Pro 1 oil pump increases oil scavenging (return) when compared with stock pumps. Less oil dragging on the flywheels is more power to the engine. All four oil pump feed and return gears are individually matched to each oil pump body, creating a maximum efficiency pump. Note: 73-81 cases will require one simple drilling step, for which the S&S oil pump drill jig (MCS 518150) can be used. No provisions are made for front or rear chain oiling.

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Home > Parts > Engine > Lower End > Oil Pumps > JIMS, ‘Flow Pro 1’ billet oil pump kit. Polished

fits  73-91 Big Twin (NU)

With top feed & return oil lines. CNC machined from billet 6061-T651 aluminum, with a clean custom appearance. The Jims Flow-Pro 1 oil pump increases oil scavenging (return) when compared with stock pumps. Less oil dragging on the flywheels is more power to the engine. All four oil pump feed and return gears are individually matched to each oil pump body, creating a maximum efficiency pump. Note: 73-81 cases will require one simple drilling step, for which the S&S oil pump drill jig (MCS 518150) can be used. No provisions are made for front or rear chain oiling.

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Home > Parts > Engine > Lower End > Oil Pumps > JIMS, ‘Flow Pro 1’ billet oil pump kit. Black

fits  73-91 Big Twin (NU)

Polished aluminum. OEM style replacement.

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Home > Parts > Engine > Lower End > Oil Pumps > Daytona, Oil pump assembly. 73-91