Large selection of replacement drive and starter belts for EZGO TXT, Marathon, and RXV gas golf cart models. Your starter belt is the smaller one that connects the drive clutch to the starter generator. It should always be snug so that the starter can turn over the crankshaft of your golf cart engine. The drive belt is the larger of the two and connects through your clutches. This belt is usually loose and tightens as the clutches expand or contract.