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The S&S CYCLE Super Stock engine case, part number 31-0052, is a precision-machined component designed for Evolution Big Twin motorcycles with a 3.5-inch bore. Constructed to accommodate strokes up to 5 inches and most stock-length connecting rods, this case offers a reliable foundation for high-performance engines. It features a machined oil filter mounting on the front of the case, allowing for straightforward maintenance and optimal oil filtration. All races are line-honed to ensure smooth operation and durability, while the breather cavity is precisely machined to enhance breather timing for maximum oil scavenging efficiency. This results in improved engine longevity and consistent performance. The kit includes essential components such as crankcase bolts, washers, nuts, cylinder mounting studs, a timing hole plug, magnetic drain plug, various breather and oil line fittings, oil pressure switch, oil screen, spring, and plug. Additionally, it comes with a sprocket shaft TimkenĀ® bearing assembly, oil seal, pinion shaft main bearing race, cam needle bearing assembly, oil pump drive shaft bushing, and detailed installation instructions. Designed for EFI fitment, this engine case ensures compatibility with modern electronic fuel injection systems. Made in the USA, the S&S CYCLE Super Stock engine case provides a robust and reliable platform for high-performance Harley-Davidson Evolution engines, supporting both race and street applications with confidence.
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