A frenetic run of six European MotoGP events in two months gets underway at the Bugatti Circuit in Le Mans, France this weekend, round five of this year’s 18-race championship.   The French Grand Prix has been a fixture on the world championship calendar since 1951 but it has changed venue repeatedly. Albi hosted the debut event while Rouen, Reims, Clermont-Ferrand, Paul Ricard, Nogaro...