Motorcycle Engine Part Air Cylinder Block For 125 SX 2016-2018 125 XC-W XCW 2017-2018 The motorcycle cylinder is the core of the engine.By burning the mist-like oil and air in it, it pushes the piston inside to move up and down, converting chemical energy into mechanical energy to generate power.The motorcycle cylinders are made of aluminum and produced by leading manufacturers.They are designed with materials that provide a long service life and low coefficient of friction, delivering power in various riding conditions for a comfortable experience.Item Type: Air Cylinder Block Material: Aluminum Package Includes: 1 x Cylinder Fits: 125 SX (2016-2018) 125 XC-W (2017-2018)