S&S CYCLE Super Stock® Alternator Style Crankcase for '84-'91 Big Twins with 3-5/8" Bore - Natural - 31-0001

Perfect for stock replacement and high performance applications in 1984-' 91 Harley-Davidson^® big twin models. This 3-5/8" bore crankcase offers some unique features. Besides being machined for a crank position sensor, they are also compatible with stock flywheel assemblies, primary covers, gearcovers, and are clearanced for 38 amp alternator stators. Includes all required hardware, fittings, and bearings natural aluminum finish. CARB Compliant- EO# D-355-5

• Cast from A356 T-6 heat-treated aluminum alloy
• Machined to accept an oil filter assembly that mounts on the front of stock motor cases
• All races are line-honed and breather cavity is precision-machined to optimize breather timing for maximum oil scavenging
• Additional parts include; crankcase bolts, washers and nuts, cylinder mounting studs, timing hole plug, magnetic drain plug, assorted breather and oil line fittings, oil pressure switch, oil screen, spring and plug, sprocket shaft Timken bearing assembly and oil seal, pinion shaft main bearing race, cam needle bearing assembly, oil pump drive shaft bushing and installation instructions
• Machined for EFI fitment
• Made in the U.S.A.
  
  NOTES: 1984-'91 style oil pump. Machined for 1984-'99 alloy primary. Machined for stock or S&S EFI crank position sensor. Stock diameter only.

Specs