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A zero-bore dial gauge was used to measure the cylinders before boring them out. The gauge was set to the standard specified by the piston manufacturer (JE, in this case) and the gauge was used to determine the correct running clearance we needed inside the cylinder. He took his measurement 0.500 inch inside the top of the cylinder, where the ring path started. From there, Page bored and honed the piston, until the clearance was right where we wanted it. The whole boring process is a very exact science with minimal room for error. View Related Article
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