Originally Posted by
alexM
Isn't there a diagram in the build manual showing where you may need to grind that corner off the master cylinders?
Yes, I found the note (as did Eddie):
Fit the inboard master cylinders and check the clearance between them and the torque tube. Modify them, if necessary, in accordance with figure E5.
(That's my emphasis.) But--there is no indication of any potential modifications in that figure. Since the manual said they can be modified, I went ahead and ground the corners back a bit with a Dremel sanding drum and find the situation much improved.
In the online manual (but not in my vintage 2011 manual), figure E5 has another bit of information that may indicate the source of my issue. There is a note that the space between the cylinder mounting bracket and the torque tube should be 0.125 (1/8"). In my kit, the brackets were placed by the previous owner/builder almost right up against the torque tube. I even had to remove one of them and file it back a bit because it was rubbing against the torque tube causing binding and removing the powder coat from the tube. I can now slip a piece of paper in the gap, but it's nowhere near 1/8 inch. This positioning causes the interference between the cylinder and torque to occur with less pedal deflection.
As usual, the forum has come through again! Thanks everyone!