S&S Cycle 31-0010 S&S Standard Bore Engine Cases

• S&S Big Twin Generator style crankcases are designed to appear like stock original H-D cases• Alternative to costly repairs when attempting to fix fatigued, broken, worn-out stock crankcases• In spite of the stock appearance, these cases incorporate updated design features that improve overall engine strength and reliability• S&S crankcases use Timken style sprocket shaft bearings 1956-99 Style and 1958 and later pinion bearings• These cases will not accept stock 1957 and earlier flywheel assemblies• Use 1936-69 Style oil pumps• Includes primary scavenge port machining• Machined for the 1965-69 alloy primary