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Engine Code: "BN157QMJ" 150cc stock, 12-Pole DC Fired, GY6 (A-Block) 54mm stud spacing longcase 20" fit 13" rear wheel, Chinese scooter model "ZNEN ZN..

Engine Code: "BN157QMJ" 150cc stock, GY6 (A-Block) 54mm stud spacing longcase 20"Locate and Decipher GY6’s Engine CodeWhere do we locate GY6's e..