Answer: 1.375" on mine. I already (previously) had my damper honed to fit. This question had to do with how my crank gear was fitting and how I was planning to make a fixture to hone its ID, slightly. I was at work, was making the fixture and didn't have the dimension handy.
In your experience, how tight should the crank gear be? Or, how much force should be used to mount it? Thanks.