Last experiment......I hope.
Since it was time to check the valve clearances again, and all the side panels and fuel tank had to be removed, it was an opportune time to install the higher temperature (90 C) (194F) thermostat:
In order for the new thermostat to fit, part of the ledge inside the thermostat housing needs to be removed.
If you are worried about messing up the stock housing, you can order a spare from CSC:
http://www.cscmotorcycles.com/product-p/z24-100.htm
I have restored the OCS to the stock configuration.
Another 1,000 miles and another oil analysis.
Then will decide on the final configuarion of the thermostat and the crankcase venting.
jb