Mirror polishing V-twin motorcycle engines is not a common practice. V-twin engines are typically made of various materials such as aluminum, steel, or a combination of both. The surfaces of these engine components are usually finished to specific tolerances and treated with coatings or finishes to enhance durability, heat dissipation, and overall performance.
While some motorcycle enthusiasts may choose to polish certain external parts of their V-twin engines for aesthetic reasons, such as the valve covers or other visible components, the internal surfaces of the engine are not typically mirror polished. Internal engine components require specific surface finishes to promote proper lubrication and reduce friction, which can be compromised by excessive polishing.
Additionally, mirror polishing engine components can be a time-consuming and labor-intensive process. It requires careful attention to detail and expertise to achieve a consistent, high-quality mirror finish. Therefore, it is more common to see V-twin engines finished with appropriate coatings or finishes that provide the necessary protection and performance characteristics rather than mirror polishing the internal surfaces.