S&S CYCLE Crankcase - Black 31-0052

A quality crankcase is the foundation of any reliable Harley-Davidson engine build. The S&S Cycle crankcase delivers precision-machined construction with optimized oil scavenging and proven Timken bearing assemblies, giving you the durability and performance needed for demanding street and track applications. This U.S.-manufactured unit comes complete with all necessary hardware and internal components, saving you time sourcing individual parts.

• Material: A356 T-6 aluminum alloy
• Heat-treated for durability
• Cylinder bore: 3.4375"
• Timken sprocket shaft bearings
• Line-honed bearing races
• Precision-machined breather cavity
• Optimized oil scavenging design
• Magnetic drain plug included
• Oil seal and bushings included
• Cam needle bearing assembly included
• Sprocket shaft bearing assembly included
• Includes all bolts and hardware
• Breather and oil line fittings included
• Timing hole plug included
• Top end oil screen assembly included
• Tapped 1/4"-20 for accessories
• 5/16" generator mounting bolts
• Compatible 1958-later flywheels
• Fits 63-65 models (with notes)
• Made in U.S.A.
• Installation: Professional recommended
• MPN: 31-0052