Well the PE250 Z uses same CDI as PE250 X, so if the RM250 CDI does nothing for the PE250 X, then is gonna do nothing for the PE250Z aswell. PE250 T uses different CDI to X/Z at least up till half way through the T model run anyway.
Just go with what Luke says and change the mounting slots. Stacks of 175 stuff out there and it will rev quicker withe the lighter flywheel.
the CDI unit? Why won't it work?
Only going by what oldfart told me
I too was gonna go the RM250 CDI route.