150cc GY6 Piston Rings, Part #164-99

Piston Ring set for 150cc GY6 4-stroke QMI157 QMJ157 engines and 150cc GY6 4-stroke ZNEN engines commonly found in Bintelli Gorilla Motor Works (GMW) and Puma scooters. Thin Ring Thickness: mm. Thin Ring Width: 2mm. Middle Oil Ring Thickness: 2mm. Piston Ring Inner Diameter : 56mm.