My 2004 club car with regen was reprogrammed for top speed. On level ground it seems to have plenty of power, but on signinicant inclines it slows down drastically. Cart has aftermarket body which weighs 80 pounds, rear steel seat with floor, 80 inch top with windshield. I realize I am not giving any speeds or incline specs, but I have measured the flat speed with gps at 19 mph. I should mention that the cart will not do 19 with 4 adults, about 16 and on the hill in question it drops drastically with two adults-425 lbs total. I realize one of the answers is weight loss. Any thoughts on a very unscientific question?