What classes run on Sat v. Sun? (Pacific & SW)

[raptorduck952]

I am wondering what classes are typically run on Sat vs. Sun. From what I can tell GTs are run on Sat. But what about GP and other classes?

Thanks

[raptorduck952]

Also, will Sportbike be run on Sat or Sun?

thanks again

[TiffineyIngram]

I would love to be able to answer your question, but the schedule for out west is going to change drastically...I would hate to tell you inaccurate information.  Hopefully I'll be able to go into detail very soon.