Maybe call Jim Carter and ask them about the expectations? It sounds like the pistons might have been made slightly oversized to account for expected wear in the bore when you are rebuilding it.

I would expect that to be called out in the listing if it was true, but maybe not? A measurement of 1.376" for a nominally 1-3/8" bore is what I would expect. Having 0.001" oversize on the bore and 0.001" undersized on the piston is pretty normal and gives you the clearance Jerry mentioned.


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