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I documented this work here.
1973 BMW R75/5 Rebuild: Measuring Cylinders, Pistons and Installing New Rings

It contains a link to the web page I wrote up with the details of what I did.

I hope...

Thanks for the input. I also confirmed that the published clearance is the total clearance (diameter of cylinder - diameter of piston) and NOT the clearance on one side of the annulus created by the...

Yeah, and I've said those words before; usually just before I learned something very important about life :banghead

Well, sure, I suppose, if you cut 25% out of a circle and then tried to close the remaining 75% into a circle, you wouldn't be happy with the result. However, in this case, a cylinder bored one over...

Ah, well sure. But, I'll be grinding the ends to get an exact fit, so no worries.

Folks,

The facts:

This bike has 97,500 miles on the engine.
The cylinders and pistons are original size, not bored out.
The left cylinder is an "A" group, the right cylinder is a "B"...