|Cycle Magazine 1976|
Kenny Roberts parlays his Flat track victories into commercial products. According to The Dan Rouit Museum gallery page Kenny Roberts, Sparky Edmonston and Jerry Griffith developed the frames.
With a lot of consideration for rigidity, this must have been a very heavy frame, compare to the Harley Davidson XR750 frame of the time- that one seemed to work well with a lot more power. I haven't seen many pictures showing KR on that bike so I wonder how successful it was.