KOSO Performance Variator Roller Weights 7 gram 16 x 13 mm for GY6 49cc 50cc Scooter Moped ATV Go Kart QMJ/QMI137 Taotao Sunl Roketa JCL Brand new KOSO performance variator roller weights set Fit most GY6 49cc 50cc scooter variators Fit mopeds with 49cc 50cc 4 stroke GY6 QMJ/QMI137 engines Dimensions: 7 gram; 16 x 13 mm