Wingsmoto Roller Performance 6 Gram Weights 16X13 GY6 50 139QMB 49cc 50cc Scooter Moped Jonway Dropship Performance 6 Gram Roller Weights 16X13 For GY6 50CC Engine we have 4g, 4.5g, 5g, 5.5g, 6g, 7g weight. Weight: 6 Gram Package : 6 pcs rollers