Once you’ve finished your first Main Operation, you’re able to begin a series of Motocross Races, signified by the previously shown icon, to engage in off-road motocross trials in and around San Francisco. You don’t need to purchase or find a motocross bike first; one is always provided to you (which you cannot change) for the duration of the race.
When you’re about to start a motocross race, your smartphone shows some helpful information: the times needed for gold, silver, or bronze medals; the length of the course; the difficulty; and the rewards (Followers and money). There are five courses to try, and a sixth (which runs the entire perimeter of the Bay Area) once you gain gold in the first five courses.
Beat the time-trial waypoint markers within an allotted time; move through lit arched waypoints to win gold, silver, or bronze. Let’s not embarrass yourself with some terrible times, okay?
As with other race types, practice makes perfect. They are a good way to also accrue Followers and money. As ever, go for gold for more Followers, and choose Hard courses for more money.