Glixal ATMT1-040 GY6 150cc 57.4mm Piston Set with Rings for 157QMJ Engine Scooter Moped ATV Go Karts JONWAY,JMSTAR,ROKETA,SUNL,TANK,PEACE,TAOTAO,Dongfang,Kazuma,JCL,BMS Used for GY6 150cc 57.4mm Cylinder Block GY6 150cc 4-stroke Piston, Rings, Pins and Clips Diameter of Piston (Bottom):57.4mm Height of Piston (Bottom to Top Middle):38.6mm Diameter of Piston Pin: 15mm