27.8 mm diameter intake valve for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 go-kart & scooter engines The valve This intake valve is used on a wide variety of go-kart & scooter models that have Chinese built 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 enginesDescription 27.8 mm diameter intake valve for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 go-kart & scooter engines. The valve This intake valve is used on a wide variety of go-kart & scooter 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 intake valve for your Chinese built 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engine. ? WARNING California Residents: Proposition 65 Warning Specifications Valve Head Diameter: 27.8 mmOverall Length: 65.6 mmStem Diameter: 4.95 mm