Originally Posted by Mr. Minecraft
Lemme know what you think!
I think you should listen to the advice of some the other experienced builders who have experienced the mechanical and operational challenges of a larger sized engine. I know you have a 49cc, but maybe start with a 79cc Predator or a Honda GX120 and ride with that for a while. Then decide later if you want to go to a bigger engine.
You asked for opinions, you've got mine.