Over here, many races do the MX2 class (125 2T / 250F) after the bigger MX1 class.
They had to make this change because usually the crowd would go home en masse,
after the MX2 races.
Over here the lites class bikes, do faster laptimes on 90% of the tracks,
and also the races are always more spectacular.
So now they are the last class of the day, to keep it interesting for the public so they don't leave early...