What causes a world championship-winning rider/team owner to quit the factory racing world and build his own engines and chassis? FREEDOM! Kenny Roberts took the considerable talent of his Yamaha factory team and forged ahead alone, first with the Modenas KR3 and then the Proton KR5. Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer talk about the development of these bikes, and manage to get a few other Alternative Engines in such as the Aprilia Cube three cylinder. Listen now!