It is always recommended to make overtaking by the left lane since it is supposed to be the fastest lane. In the event that the motorcycle is on the left lane, its driver must be notified by means of light signals or horn so that it can run towards the other lane and thus be able to overcome it by the left lane (but this as the last option).
As a transport management code you always have to overcome vehicles on the left to avoid surprises in drivers who are exceeded
