Camshaft stopper plate for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines This camshaft stopper plate 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 Camshaft stopper plate for 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines. This camshaft stopper plate 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. WARNING California Residents: Proposition 65 Warning