Athena 2004 Aprilia MX 50 40mm Bore 50cc Standard Bore Cylinder Kit

Athena has invested over ten years in improving the production and performance of their aftermarket replacement cylinders. All cylinders are engineered in Italy by Athena’s R&D Department, utilizing strong internal expertise and advanced tools for design and testing. They are coated with motor-nicksil, a nickel-silicon coating developed by Athena for optimal smoothness and wear resistance. Athena’s cylinder kits are recognized globally for performance, durability, and reliability. This Standard Bore cylinder kit offers the same performance as original spare parts, extreme reliability, and optimal smoothness due to its lightweight aluminum cylinder, nickel-silicon coated barrel, and a friction-reducing piston. The kit includes a high-quality aluminum cylinder with standard bore, a cylinder head with an interchangeable central dome, a complete piston with pin and rings, and all necessary gaskets. All components are designed to withstand high temperatures, pressures, and stresses, validated through rigorous bench and road tests by Athena technicians. This kit can be installed without modifying the engine crankcase.