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

S&S Cycle has been building performance engine components for Harley-Davidson motorcycles for decades, known for their robust construction and improved power output. This 4-inch stroke flywheel assembly is a prime example of their commitment to the rider looking to enhance their Big Twin's performance. It's designed to increase displacement and torque, giving your motorcycle a more powerful feel off the line and through the gears.

This assembly is a well-built unit featuring a 4-inch stroke, which is a significant increase over stock for many Big Twin models. It comes complete with a sprocket shaft bearing race, ensuring you have a critical component for proper drivetrain function. The flywheel is intended for non-balanced Big Twin engines from 1999 to 2006, excluding 2006 Dyna models, offering a substantial upgrade for riders seeking more power. Installing a flywheel assembly like this is a major engine modification, and it's crucial to ensure all related components are in good condition and properly balanced for optimal performance and longevity.

When undertaking an engine build of this magnitude, it's important to consider other drivetrain components. This flywheel assembly is a foundational piece for a larger displacement engine build. Ensure you consult with a qualified mechanic or refer to S&S Cycle's detailed installation instructions to confirm all requirements and compatibility for your specific motorcycle model.