Quote Originally Posted by Bitsyncmaster View Post
From what I have seen, it's always both springs are bad and you can tell they are bad just by looking at them. All the photos of bad springs show the same two or three coils that are spaced wider than the rest of the coils.
Both springs were bad in my case. Also it wasn't a "catastrophic" failure, but a slower one with the idle slowly creeping away from 750 over several thousand miles..like the springs were losing their tension with each use.

Was the butterfly valve assembly a supplied unit or was it assembled at the DMC factory?