Viñales remains MotoGP™ ’ s greatest enigma . All preseason he was unable to keep team-mate Espargaro ’ s pace , yet was the star of Round 2 in Portugal and unlucky not to walk away with a pair of podiums . Last year showed him to be incredibly fast on his day . But too often the results didn ’ t match his potential . Now in his third full season for the Noale factory , the 29-year old is approaching his best ever form , as witnessed in Austin where he became the first rider in the MotoGP™ era to win aboard three different manufacturers . Expect similar challenges in the races to come .