Pope Francis signs a motorbike as he meets members of an association of Jesus Bikers International who attended his weekly general audience, in St. Peter's Square at the Vatican.

Marc Marquez of Spain drives his motorcycle during a Moto GP practice run at the Termas de Rio Hondo circuit in Argentina.

Travis Pastrana jumps a row of crushed cars on a motorcycle in Las Vegas. Pastrana is attempting to recreate three of Evel Knievel's iconic motorcycle jumps on Sunday, including th...

Travis Pastrana jumps the fountain at Caesars Palace on a motorcycle in Las Vegas. Pastrana recreated three of Evel Knievel's iconic motorcycle jumps, including the leap over the f...

A man stops to smoke a cigarette on his motorcycle in Moscow, Russia, during the 2018 soccer World Cup.

Bikers ride past the State Hermitage museum during a bikers' parade in St.Petersburg, Russia.

A family ride their bike past military troops during a bikers' parade in St.Petersburg, Russia.

Britain's Prince William visits the Triumph Motorcycles and MIRA Technology Park in Hinckley, England.

Adrien Van Beveren, of France, rides his Yamaha motorbike during the second stage of the 2018 Dakar Rally in Pisco, Peru.

Paola Quattrino, Product Manager, Ducati Motor Holding and Sergi Canovas, Managing Director of Ducati India unveiling the SuperSport S bike in Pune.

Visitors look at a BMW Concept Link during the first media day of the International Frankfurt Motor Show IAA in Frankfurt, Germany.

A freestyle motocross rider performs a stunt with the swiss alps in the background during a performance at the Bike Fest event in Verbier, Switzerland.

Visitors look at the motorcycles on display at the Harley Days Festival in Hamburg, Germany.