S&S Cycle 99-06 BT 4-3/8in Stroke Flywheel Assembly w/ Sprocket Shaft Bearing

S&S Cycle has been a well-known name in performance motorcycle parts for decades, especially for Harley-Davidson engines. They're known for building robust components that can handle the demands of high-performance riding. This 4-3/8 inch stroke flywheel assembly is a prime example, designed to give your Big Twin engine a significant increase in displacement and power when you're rebuilding or upgrading the drivetrain.

This assembly comes complete with the sprocket shaft bearing race already installed, which is a notable convenience during a complex build. It's specifically made for 1999 through 2006 non-balanced Harley-Davidson Big Twin engines, though it excludes 2006 Dyna models. By increasing the stroke to 4-3/8 inches, you're effectively increasing the engine's displacement, which translates directly into more torque and horsepower. This is the kind of foundational component you'd look at when aiming for a substantial performance improvement in your engine's bottom end.

When undertaking a project like this, it's important to ensure all related components are in good condition. This flywheel assembly is a critical piece for the heart of your engine, and its proper installation is key to achieving the performance gains and reliability S&S Cycle is known for. Always refer to the manufacturer's installation instructions for specific details regarding assembly and setup.