To give another data point, my daughter (with my guidance) is building a 3.4 and we are changing the rod bearings and bolts. She is home this weekend, so we grabbed the bearings and measured them the same way as Onevoice in the first post.
We used a calibrated snap gauge and a drill to do the measurements and they came out excellent. The bearings were manufactured 07-09 in Germany. I have read here that these are the only reliable bearings and that any from the other countries do not measure up. I found these online for $25 from someone's "new old stock" and took a risk that they would be good.
We have only random sampled them so far but here are the details of the 4 measured so far. The same way it was done before and in the same places. All measurements are in inches and they are very consistent.
Bearing package, exactly the same as others have.
Country made in is a sticker on the outside of the box
Cal sticker. It's old but the tool is rarely used. Mostly for Ducati valve adjustments.
Mitu snap gauge; calibrated
How we measured on the edges, I used a drill but a ball bearing might have been even easier.
Allie concentrating to get the drill rod vertical and the bearing rocked to the lowest reading
It gets easier with repetition. and she was able to get very solid measurements.
Tomorrow she begins the major portion of the build. Rods, pistons and heads. We hope cam towers. I will take pictures and post in another thread.