This upgrade represents a modification to the engine of a Honda Trail 90 motorcycle. It involves replacing the existing cylinder and piston with components that have a larger bore diameter. This change effectively increases the engine’s displacement, measured in cubic centimeters (cc), resulting in a larger combustion chamber volume within the engine.
The increased displacement generally leads to enhanced engine performance. A key advantage includes greater torque, providing more pulling power, particularly at lower engine speeds. This is beneficial for off-road riding and tackling steep inclines. Historically, such modifications have been popular among enthusiasts seeking to improve the performance of their vintage machines without drastically altering the original design.