S&S Oil pump billet pre 1999 bigtwin models
S&S's new, 1981 thru 1999 style oil pumps for Big Twins are CNC machined from solid billet aluminum for strict manufacturing tolerances and high-gloss polished for that "different look". S&S oil pumps route surplus oil back to the main supply passage rather than the return to eliminate unnecessary filtering and offer the opportunity to upgrade earlier engines to the 1981-up oiling system. This oiling system splits bottom and top end oil supplies, increasing oil pressure to hydraulic lifters and top end. Another simple, optional modification will improve primary chain oiling in 1965 thru 1972 models. The oil pump cover is compatible with both OEM steel oil lines as well as conventional neoprene line to insure a simple installation and professional, uncluttered appearance. S&S oil pump assemblies come complete with all internal parts assembled, gaskets, drive shaft with keys and snap ring, mounting hardware, check ball and pressure relief valve assemblies. For those who want everything to be 101% there is an oil pump assembly complete with drive gear, breather gear and shim kit available.
note:
73-80 cases will require one simple drilling step
(for wich 518150 can be used)
part numbers
oilpump only
- 711471: 36-72 bigtwin (requires 73-77 breather gear)
- 711472: 73-91 bigtwin
- 750604: 92-99 bigtwin (no twincam)
- 711473: 84-99 bigtwin (universal)
