caliper/master cylinder

help please, i started restoring 1977 kz1000a and have spongie front brake and not rear brake. i thing i need to rebuild both master cylinders along with both calipers, how hard of a job is it to rebuild caliper and mastercylinders

calipers are pretty easy,mstercyinders can be a little tough to take apart;)

they are not that hard to rebuild, I would go back with dot5 when you do it

not sure what dot5 is

dot 5 is the synthetic, sp, it dosent absorb water and it will not eat paint, plus it has a higher boiling point than dot 3, just make sure you clean the whole system out of the dot 3, you will like it a lot