S&S Cycle Super Stock Alternator Style Big Bore Engine Case For Harley Big Twins 1984-1991

S&S Cycle Super Stock Alternator Style Big Bore Engine Case For Harley Big Twins

This 3-5/8" bore crankcase is designed for both stock replacement and high-performance Big Twin builds. It features machining for a crank position sensor and is compatible with stock flywheel assemblies, primary covers, and gearcovers, with clearance for 38-amp alternator stators.

Features:

• S&S complete engine cases come set-up with the cam and sprocket shaft Timken main bearing races installed and pinion shaft bearing race pressed in and line honed, ready to fit
• Offers substantial labor savings and eliminates the need and expense of "line boring and honing"
• Cast from 356-T6 heat treated aluminum alloy and CNC-machined for consistently superior quality
• Additional material has been added in key areas for strength without requiring modifications for frame clearance
• Clearances for any stroke up to and including 5″ with stock or beefy S&S rods
• Ported breather passageway/cavity optimizes oil scavenging efficiency while providing maximum timing specifications
• Crankcase assemblies include left and right cases, case bolts, nuts and washers, cylinder mounting studs, timing hole and drain plugs, assorted case fittings, sprocket shaft Timken bearing assembly, drive sprocket spacer and oil seal, pinion shaft main bearing race, cam needle bearing, oil pump drive shaft bushing and installation instructions
• Shipped with oil scraper machined for stock diameter flywheels
• Requires S&S Cycle Billet Aluminum Oil Pump or OEM 26190-73 oil pump
• Made in the USA