Reuters | Marquez is MotoGP's youngest four times champion Reuters VALENCIA, Spain (Reuters) - Honda's Marc Marquez won his fourth MotoGP world championship in five years on Sunday after the Spaniard's only rival Andrea Dovizioso crashed out of a dramatic season-ending race in Valencia. FILE PHOTO: Honda ... MotoGP: Dani Pedrosa wins Grand Prix of Valencia, Marc Marquez clinches 2017 title Miller Time: Saying goodbye Marc Marquez wins fourth MotoGP title on last race of season |