Kaptain Krunch
Pro Junk Collector
50 hp Wankels seem to be the hot setup in some classes of go kart racing, here's a link to bunch of rotary powered race kart videos. These little engines haul-A: http://video.google.com/videosearch...AA#hl=en&view=2&emb=0&q=go+kart+rotary+wankel
From my research, the unique power curve of these rotary kart engines seems to really help karts put more power to the ground without wheel spin. The power curve of piston-type race kart engines with similar power levels tend to cause more wheel spin resulting in slower lap times.
I also learned that Norton built a rotary powered race bike back in 1993.
Suzuki made a rotary powered bike in the 70s, wasnt a big hit i think it only went for 2 years before they stopped making them. Called the RE 5, cool looking bikes but i hear the gas milage wasnt the best.