11Pcs Cylinder Piston Kit 47mm Bore Aluminium Alloy High Strength for Dio50 ZX50 AF34 AF35 70cc 1. Applicable Model: Cylinder piston rings gasket kit fits for Dio50 ZX50 AF34 AF35 70cc, and the cylinder bore is about 47mm / 1.85in.2. Piston Function: In an engine, A piston is to transfer force from expanding gas in the cylinder to the crankshaft through a piston rod and or connecting rod.3. High Performance: The cylinder is easy to operate, easy to control, effectively improve engine displacement and performance, increase horsepower and torsion.4. Long Lasting: The cylinder is made of aluminum alloy with high strength and not easy to deform, which can reduce the vibration of the engine and make the driving more stable and smooth.5. Complete Repair Kit: Top end rebuild kit includes 11pcs esstential parts,compact structure, exquisite workmanship, high reliability.Specification:Item Type:Cylinder Piston KitMaterial: AluminiumAlloyCylinder Bore: Approx. 47mm / 1.85inCylinder Displacement: 70ccApplicable: Fits for Dio50 ZX50 AF34 AF35 70ccPiston Function: A piston is a cylindrical engine component that slides back and forth in the cylinder bore by forces produced during the combustion process. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft through a piston rod and or connecting rodPackage List:1 x Cylinder Piston Kit (11Pcs)