125cc GY6 Piston Rings, Part #164-91

Complete Ring Set for 125cc GY6 4-stroke QMI152 QMJ152 engines. Fits 125cc GY6 Cylinder with a bore of 52.4mm. Black Ring Outer Diameter: 55mm. Black Ring Inner Diameter: 50.8mm. Silver Ring Outer Diameter: 54.4mm. Silver Ring Inner Diameter: 50.4mm. Black Ring Thickness: 0.98mm. Black Ring Width: 2.1mm.