Inner valve spring for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines This inner valve spring is used on a wide variety of scooters and ATV brands and models that have Chinese built 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines Description Inner valve spring for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines. This inner valve spring is used on a wide variety of scooters and ATV brands and models that have Chinese built 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines. Please check the dimensions on the Specs tab to see if this is the correct inner valve spring for your Chinese built 150cc and 125cc GY6 QMI152/157 and QMJ152/157 engines. WARNING California Residents : Proposition 65 Warning Specifications Inner Diameter: 12.3 mm Outer Diameter: 16 mm Height: 32.6 mm