S&S Cycle 4.125 Inch Bore Crankcase for Dyna - Stock Bolt Pattern, Wrinkle Black Finish (Part #310-0856)

Product type: Bottom End Components

SKU : 0920-0157

Regular price $2,245.95 USD

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Crankcase - 4.125" Bore w/Stock Bolt Pattern - Wrinkle Black - Dyna The S&S Cycle 4.125 inch bore crankcase is designed to...

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Crankcase - 4.125" Bore w/Stock Bolt Pattern - Wrinkle Black - Dyna

The S&S Cycle 4.125 inch bore crankcase is designed to serve as a robust foundation for custom engine builds or as a direct replacement for models like T111, T124, or T143. Crafted from superior 356-T6 aircraft-grade aluminum, this crankcase offers a combination of strength and durability while maintaining a stock appearance. Its thicker wall sections and reinforced front motor mount provide enhanced structural integrity, making it suitable for demanding applications. The crankcase features a tough powder coat finish in wrinkle black, giving it a sleek, professional look that resists corrosion and wear. Included with the crankcase are studs, cam bearings, a pinion, and a Timken® bearing, ensuring that the assembly is ready for installation and reliable operation. The crankcase is specially machined to accommodate the new S&S oil line installation kits, sold separately, and is clearanced for strokes up to 4-3/16 inches and cams with up to 0.720 inches lift, providing flexibility for performance tuning. Made in the USA, this crankcase is also equipped with a reinforced front motor mount and a Timken® sprocket shaft bearing—features that cater to the most demanding and high-performance motorcycle builds. The inclusion of the Manufacturer's Statement of Origin (MSO) guarantees authenticity and traceability for custom or commercial projects. Whether used as a replacement or as part of a custom engine, the S&S Cycle crankcase offers a reliable, high-quality solution for serious builders seeking durability and performance in their engines.

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