The VERTEX 2-stroke pistons are crafted using gravity casting from an aluminum alloy containing 18% silicon. The inclusion of silicon reduces thermal expansion under operating temperatures. This offers the advantage of making the piston less susceptible to clattering and breaking. Additionally, silicon enhances the wear resistance of the pistons, thereby extending their lifespan. The piston kit includes piston ring(s), piston pin, and piston pin lock. Piston types for 2-stroke engines: Replica (matches original shape), Race (performance-enhancing design), Pro Race (forged special piston).