Thank god I read your post Jimmy, I was ready to change the trans oil in my Stock Motos tonight after reading others.
I only change the trans oil every 2 years when I do a bottom end rebuild. That is around 24x race meetings at about 1 hour racing each meeting.
I use Castrol MTX which is 2 stroke trans oil for wet or dry clutch, no problems.
Our seasons would see a low of 40F – 100F and no snow so don’t have extreme outside conditions like some parts of USA to consider condensation in the transmission. Pretty much we are like LA California conditions here.