Highlights from the opening round of the 2016 AMA EnduroCross Championship, Atlanta.
Hillclimb events are famous for attracting big bore machines so when Alta rocked up with its electric bike it caught everyone's attention.
See what went down at the MXGP of Switzerland in the highlights package from an epic weekend of racing.
Take a look at what's behind the world's toughest motorbikes. These need to be built to undergo extreme conditions and take on extraordinary challenges.