VERTEX 2-stroke pistons are crafted using gravity casting with an aluminum alloy containing 18% silicon. The silicon component reduces thermal expansion at operating temperatures, resulting in a piston that is less prone to knocking and breakage. Additionally, silicon imparts improved wear resistance, thereby extending the piston’s lifespan. This piston kit, compatible with YAMAHA models, comes complete with piston rings, piston pin, and circlips. Offered in different variants: Replica (matches original form), Race (performance-enhancing), and Pro Race (special forged piston). Perfect for maintaining your motorcycle's engine performance.