Description:

Fitment - Compatible with the Chinese GY6 4-stroke 170cc 157QMI Engine (76mm bolt pattern); not compatible with 80mm bolt pattern engines. Material - Made of aluminum alloy, it boasts light weight, excellent heat dissipation, and high strength and stiffness to withstand cylinder pressure and loads.. Specification - Inner Diameter: 61mm and Outer Diameter: 65mm,.Outer Diameter of Piston Pin: 15mm. Package Including - Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,Intake&Exhaust Studs,Exhaust Nut.