Gates Powerlink 669 18.1 30 CVT Drive Belt for GY6 49cc 50cc 139QMB Short Case Scooter Moped ATV Go Kart Roketa Taotao Vespa Jonway Brand new GATES POWERLINK drive belt Fit 49cc 50cc scooters, ATVs, go karts, and mopeds with GY6 139QMB short case engines Size 669-18.1-30