An amazing forum member (anonymous until he wishes to be revealed
, pics of his craftsmanship below) has welded a new fitting on to my master, so the project is still alive. Leak tests are pending.
In the meantime, I have gone back to stock master and mechanical left hand rear brake.
I am trying to figure out if I have air, water, or just insufficiently high temp boiling point DOT 4 in the system.
At the beginning of the ride, my left hand rear brake is sort of mushy feeling. After an hour of hard and heavy use, the lever becomes very firm.
As the fluid heats up is it causing water to boil, brand new Castrol DOT 4 to boil, or is that air heating up and expanding?
To rule out air and water, I could bleed it again with fresh fluid of the same type.
To rule out the inadequacy of the fluid, I could then bleed with better quality brew.
I may do both.