669-18-30 Drive Belt for 4 stroke GY6 49CC 50CC 1P39QMB 139QMB, such as engine Scooter, Go Kart, Moped, ATV. Brand new aftermarket Drive Belt. Diameter: 669 mm. Width: 18 mm. Pitch: 30 degrees. Compatible with GY6 49CC 50CC ROKETA TAOTAO VESPA JONWAY SCOOTERS, MOPED, GO KART & ATV Package includes: 5 x Drive Belts Please check your correct replacement parts before purchase, thank you Good Performance Made of excellent quality rubber material, it’s sturdy and durable in use. Designed for superior, high mileage and reliable performance. Select the Correct Belt 1. Determine the series type. 2. Measure the “Outer Diameter” (O.D.) of the driven pulley on the jackshaft. 669 18 30 CVT Drive Belt 5-Pack