Measuring and extrapolating as best I could, I went with the S&S spec for the treble hammers: 2 9/16". This produced a even blow distance with the bass. Regards, Jon Page Sorry. Ray wasn't reading far enough. The spec is 2 1/4 bass and 2 5/8 tenor with 6 or 7 degrees of rake. He says the bore can vary a little. What a shock. Dale Erwin R.P.T.
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