Don Castro, Champion Flat Track Racer and AMA Hall of Fame Inductee, was the definition of form and function.  His bikes performed amazingly well on the track and looked like they could be dusted off and taken to a concourse bike show the next day.  Even with his factory Triumph ride, ther …

  The Don Castro Red-lined framed, Tracy Fiberglas Triumph only raced once, pronounced illegal for slipstreaming by the AMA and then retired in 1972.  The bike could have disappeared after that.  And without Don Miller, it probably would have.  Miller has been a flat track fanat …