I bought a 77 electric Harley Davidson golf cart and it seems to run pretty good on flat ground. Unfortunately our lake area is not flat. I know pretty much nothing about the cart. Thought the guy that I bought it from said batteries were 4 years old? This thing bogs down so slow on any kind of incline to the point that u feel like u need to get out and push. Trying to see what I can do to power it up a fuzz or at least where to start. Any and all suggestions appreciated!