Hi, I want to build a yard shifter kart. I already have built a kart with a Predator 212 but I really want to convert it to a shifter kart. The frame is not bad so I am really just concerned about the engine. What engine would be best for a small yard shifter kart? I'm not looking for anything crazy. Maybe something around 6-10 hp. Only looking to go 30-45 mph. I was already thinking about a 125cc Honda engine but I'm not sure if that will be best.