The top three riders sat within a few seconds of one another for the majority of the moto, but Webb and Musquin soon pulled ahead in what became a thrilling showdown for the win. As the leaders encountered lapped traffic, Musquin closed in on Webb's rear fender and was able to make an aggressive pass for the lead on Lap 10. Webb then removed his goggles, enabling him to continue the fight for the position. Musquin was forced to remove his goggles as well after losing ground to Webb, with the battle reaching its pinnacle on the final lap. With less than a bike length between the top two, lapped riders forced Webb to alter his line in the slowest part of the track, almost sending him to the ground and allowing Musquin to open a small gap that he carried through to the finish. Webb was second, 2.305 seconds back, with Tonus hanging on for third. Martin managed to work his way into the top 10, finishing ninth.