Can you mix and match? Or do you have to site both on the same cc?
I doubt you can do half the DAS on a 125. The whole point of the module 1 is to show machine control. And it was originally designed as a single test to be done in two parts in one day so it would make no sense to swap bikes half way through.
I don’t think they have to both be on the same cc bike but they have to be in the same category, i.e. in order to do a module 2 “bigger bike” test, you have to pass a module 1 “bigger bike” test - passing the module 1 on a 125 wouldn’t suffice.