I have a 1998 G-19E Yamaha which I keep at a campground that has many steep hills. The cart runs okay but when on a steep grade is slows to a crawl. I want a more powerful motor upgrade with more torque for climbing hills. I've shopped a few websites however some more powerful motors specify that a lift kit is necessary. I do plan on adding sone slightly larger than stock wheels in my upgrade but no lifting unless it's unavoidable. Also I'm interested in what effect a more powerful motor will have on battery life and charge duration. Should I install heavier cables? Will I need a new controller or any other additional parts? Uphill power is a higher priority than speed (although speed is fun), so I'm open to suggestions. Also, what is the approxamite speed of this stock cart and what change would a given motor produce?