by dickie » Sun Mar 03, 2024 7:56 pm
It's difficult to state an absolute minimum as 5 plate clutches are all different.
For example, if you use different steels, then the minimum thickness varies. The same is true if you use different springs, different gearbox or your motor produces different torque.
So the best way to tell, in my opinion, is that if it slips under load up and incline, they're goosed.
Sorry for half-arsed answer.