This kit fits most Chinese Scooters/Mopeds with 50cc, 60cc, 70cc, 90cc ... -Stroke GY6/139QMB engines!!! This will increase your p This kit fits most Chinese Scooters/Mopeds with 50cc, 60cc, 70cc, 90cc ... - Piston1 - Wrist Pin2 - Head Gaskets1 - Complete Ring Set Big Bore Kit Scooter GY6 100cc including Piston & Ring set and head gaskets ...