RE: 2-Stroke & 4-Stroke
They are using a honda gx31and 35cc I believe in the boats. And they also working on forced induction bigger cams ,valves etc. but currently 50's is tops compared to 20's a few years ago. Eventually I'm sure they'll make it over here. They also run really well on nitro in planes and have miny supercharges that work just like the full size.