There's a new 80cc kit on the market made by the same people who made the 4 cylinder bike. It's prices are on par with the 2 fast prices and it can be a complete kit of Cylinder, Crank and Exhaust. Here are some pictures of it compaired to a 2fast. And here is a quick dyno sheet. Running a custom built exhaust but an untuned cylinder. 30mm carb too. That's 29.3PS aka 28.8bhpish. :drool: