Yamaha NMAX Aerox NVX 155 New 2025 Big Bore Up Kit. BRT Block Cylinder Assy 180cc. 63mm Forged Ceramic Cylinder Block. Top and Bottom Gaskets (Gasket Set). Advantages of the Ceramic Cylinder Block. Superior Heat Dissipation: The engine runs significantly cooler and prevents overheating, ensuring a much longer engine lifespan. Stable Performance: A cooler engine naturally leads to stable and consistent motor performance. Versatile Application: Suitable for use in Daily Commuting, Touring, and Competition/Racing motorbikes. The condition of these items are best represented by our photos. If you have bought the wrong items, then the return does not apply. Please understand that any delay due to custom clearance or postal service is beyond our control. We are available in 7x24 hours to respond your message. Please understand that any delay due to custom clearance or postal service is out of our control. We will do our best to solve any problems. Please do not leave negative feedbacks without contacting us to resolve problem.