S&S Cycle 2007+ BT 4-3/8in Stroke Flywheel Assembly w/ Sprocket Shaft Bearing Race

This S&S Cycle flywheel assembly gives you the actual components to rebuild your 2007 and later Harley-Davidson Big Twin engine's drivetrain. It includes the flywheel assembly with the sprocket shaft bearing race already pressed on, ready for installation. This assembly is designed to work with high-performance pistons that accommodate connecting rods with full-width wristpin ends, offering a robust upgrade for your engine's core rotating assembly.

What sets this assembly apart is its construction and precision. The flywheels are CNC machined from heat-treated, closed-die steel forgings, making them significantly stronger than stock steel flywheels. This well-built assembly is trued to an impressive runout of less than .0005 inches on the pinion and sprocket shaft bearing surfaces. This level of accuracy allows for higher RPM operation and ensures full compatibility with gear-drive cams, a critical factor for performance builds. The assembly is fully put together using S&S heavy-duty connecting rods, which feature full-width wristpin ends, and it's dynamically balanced for smooth operation.

The design incorporates forged-in pinion and sprocket shafts, and the connecting rod crankpin is pressed into the flywheels, minimizing potential failure points. This three-piece design is a solid option for anyone looking to enhance the performance and reliability of their Big Twin engine. When installing, remember to consult the manufacturer's instructions for proper procedures, especially regarding the use of specific pistons and connecting rod types.