An engine modification designed to increase displacement, this upgrade replaces the stock cylinders and pistons with components having a larger diameter. Specifically tailored for a particular air-cooled, V-twin engine platform produced between 1984 and 1999, it aims to enhance power output. As an example, installing such a modification on a 1340cc engine would result in a larger total engine volume, typically around 1450cc or greater.
The significance of this modification lies in its potential to substantially improve engine performance. By increasing the cylinder volume, the engine can draw in and combust more air and fuel, resulting in greater torque and horsepower. Historically, this upgrade has been a popular choice for riders seeking to improve acceleration, passing power, and overall riding experience without undertaking a complete engine replacement. The availability of aftermarket kits has also contributed to its widespread adoption.
