Amazon.com: Hoca 169-149 QMB139 16 by 13 4 Gram Roller Weights for 50cc and Larger Scooters : Automotive
Amazon.com: Racing Driving Wheel Roller 5.5 Gram Weight Set replacement for GY6 50CC 139QMB 49cc 50cc Scooter Moped Jonway ATV : Automotive
Amazon.com: Racing Driving Wheel Roller 6.5 Gram Weight Set replacement for GY6 50CC 139QMB 49cc 50cc Scooter Moped Jonway ATV : Automotive
Amazon.com: Glixal ATKS-041 High Performance Racing Variator Kit with 6.5 gram Roller Weights for Chinese Scooter Moped ATV 4-Stroke GY6 50cc 80cc 100cc 139QMB 139QMA Engine Front Clutch : Automotive