It has been a long time since I have worked on a Honda clutch. But memory serves me that it isn't that difficult.
my dad and i had to replace my clutch in my 300ex and it was not that hard at allif you have replaced anything that has a clutch basket they should be relatively the same or at least I would think so..The hardest part for me was always getting the friction disks and springs right, other than that the 250x and 300 ex are the same.