Harley-Davidson's famous racing boss Dick O'Brien was looking in the 1960s to strike back at Triumph and its 500cc twins that were winning Daytona. With the help of star tuners Jerry Branch and Neil Keen, plus some clever work at the Caltech wind-tunnel, Harley came back with a race-winning flat-head 750 AND tested a strange prototype called the Midget that was even faster but is lost to history. Find out about the $60,000 Goodyear tires as Kevin Cameron and Mark Hoyer talk about this amazing story.