Put the game on the easiest settings with full assists.
Go to:
Quick Race -> Milford Street Circuit -> Mass Start -> 1 lap
Press
Select Superbikes, then press
once to select the Norton V4 RR.
During the race, you'll pass through some shipping containers, then turn square left at the end. From here, hammer it at full throttle all the way, ignoring the racing line telling you to slow down. Once you pass the finish, press
to complete the race.
The achievement will pop on the loading screen.