The engine alignment done by eyeball back in 2006 for the Honda repowering held out until 2013. During the summer, I noticed that the driveshaft's front rag joint was starting to disintegrate.
I bought replacement rag joint set (PN 922-3000) and the old and new parts compare like this:
The driveshaft fits inside of the repowering kit's adapter so I had to remove the engine to be able to change the rag joint.