Feature●The New Cylinder Body will replace the cylinder body of 2 stroke 66cc/80cc motorized bike engine kits,NOT compatible with 48cc 2 stroke kit;●New Design inside, Inner diameter of cylinder(bore):47mm, please refer to pictures listed; New Design on outlet to muffler and air intake to manifold intake;●40mm Intake Manifold Stud Spacing; Cylinder body Gaskets are not included;●G.W:0.7kg/Package, Inside wall of cylinder: Electroplated●Any questions,please contact us firstly! We can help you solve the problem until you are satisfied.Description