Dave
I rebuilt my Master cylinder 4 times and was very careful to do it right such as honing with steel wool as the factory said and so forth. They would last maybe 5000 miles or less so the last time I replaced it with a new one and no more trouble. Buy a new one and save time and money. Mine was under warranty the first 3 times but they never sent me a new m/c as they should have but the one I bought is good. Don't know about the rear caliper but unless it is leaking I would only flush and not take it apart.
Adrian
I rebuilt my Master cylinder 4 times and was very careful to do it right such as honing with steel wool as the factory said and so forth. They would last maybe 5000 miles or less so the last time I replaced it with a new one and no more trouble. Buy a new one and save time and money. Mine was under warranty the first 3 times but they never sent me a new m/c as they should have but the one I bought is good. Don't know about the rear caliper but unless it is leaking I would only flush and not take it apart.
Adrian