Not Ranked
Simon:
two things;
1/ get a second opinion on the bore/piston clearnce measurements in your exisitng engine.
2/ check the rod side clearances, to ensure they are large enough to give sufficient splash lubrication to the bores. Someone elsewhere mentioned the fillet radius at the "ends" of the crank pin journals being large, which can cause this rod side clearance to close up - a good point.
HTH
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Wilf
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