We highly recommend upgrading your stock leaf springs to heavy-duty versions which will help support the extra weight of the seat kit and additional passengers. Stock springs were designed to support a couple of golf bags. The addition of a rear seat kit can add up to 150 lbs. plus the weight of 1-2 passengers. Description Black golf cart flip folding rear back seat kit for Yamaha Drive2. Tech Tip: We highly recommend upgrading your stock leaf springs to heavy-duty versions which will help support the extra weight of the seat kit and additional passengers. Stock springs were designed to support a couple of golf bags. The addition of a rear seat kit can add up to 150 lbs. plus the weight of 1-2 passengers.