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Author Topic: M91 water cooled vertical H&M. A recap.  (Read 2093 times)

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Re: M91 water cooled vertical H&M. A recap.
« on: July 23, 2021, 07:24:02 am »
Good idea AJ !!.....Wonder if Tightened up exhaust rocker arm Lash for Later valve closing timing would accomplish similar Reduced CR simulation effect ??
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