Outer valve spring for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines This outer 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 enginesDescription Outer valve spring for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines. This outer 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 outer valve spring for your Chinese built 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engine. ? WARNING California Residents: Proposition 65 Warning Specifications Inner Diameter: 17 mmOuter Diameter: 22.3 mmHeight: 35.5 mm