Vertex stempel Race Evolution - 85 SX 2003-2024

Race Cast piston developed with Vertex technology and race shape profile All pistons are heat treated with a T-5 hardening and tempering cycle All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life Cast piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston Kits include piston, rings, wrist pin and circlips Replacement two-stroke piston rings sold individually; four stroke piston rings sold as a set