Yamaha ranks third among constructors in winning MotoGP season championships — with 17 — and Hall of Fame Collection is fortunate to have race-worn items from the factory team’s past two season champions. A helmet worn by Valentino Rossi is among the rarest since “The Doctor” has almost everything he has ever worn in MotoGP in his personal collection. Rossi (on the right in the above photograph) won four titles for Yahama (2004, ’05, ’08 and ’09). Jorge Lorenzo is another of...