Hi, I recently bought the XV2's (from AMAIN) for both the B5M and D413. Today I finally got around to installing them on the B5M.
The hole in the piston was too small for the shaft. I wasn't sure if it was a defect or I was supposed to ream it so I just reamed it. However, the washer holes were too small as well. I probably could have reamed them as well but when I was test fitting the piston, it didn't appear the Piston and the washer would fit, and still be able to fit on the e-clip to hold them down. I just left off the washer and kept the e-clip and it seemed fine.
THe D413 one I have yet to open but the shaft is even wider than the B5M's, and it appears the holes are same (too small). Just wondering if this is normal or what?
Edit - Just saw that the tip where you put the piston on is smaller for the D413 then the rest of the shaft, so it probably will be fine. GUess my question is just for the B5M. Wonder if the wrong hardware was in there?