The oil collection pan is part of the dry sump system which is used in some motorcycles.
It replaces the sump in the wet sump system, but it is much smaller.
It collects the oil after it has circulated through the engine, and directs it to the pick-up strainer on the scavenge pump. Since no oil is stored in the engine in this system, a dipstick that is normally used to check oil levels in the sump is not needed.
