It's been a while since I have messed with my Tornado. I also have a Tsunami I bought off a buddy with the same problem.
Transmissions keep stripping. Not sure why, I have been making them tight and feeding paper through to make sure it was not too tight, but I still just stripped a transmission again. Has there been any upgrades to a steel transmission? I would love to go steel single speed and let her rip.
Maybe because I was doing donuts in the grass when the transmission tore up? I wasn't going full throttle, but it shaved it.