Scooter drive belt is not toothed like on motorcycle. Over 400,000 miles with rubber band drive scooters---my advice change with OEM belt at their recommended intervals, or in the case of age Walking sucks. I always carry spare, new drive belt---as dealers will not have them. My record, now 11 new maxiscooters, following makers recommendation on miles and using OEM belts=one broken belt underway in VA with Helix...and Helix you could change belt at roadside without taking front pulley off.