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, and converts chemical energy into mechanical energy to generate power. Produced by advanced manufacturing processes, these cylinders are made of materials with long service life and low coefficient of friction.They can provide performance in a variety of operating conditions. Item Type: Air Cylinder Block Material Type: Aluminium Size: 76.80mm OEM Code: 12100-KRN-A60 Package Includes: 1 x Cylinder Fit for: CRF250R 2010-2017 This is a replacement part from a third party.All brand/model references serve only to show intended compatibility.