Now the weather is calming down (mid 20s, has been mid 30s for 6 weeks until recently) I took it out for a ride to check if the jets made a difference to slow speed running. The original 17.5 jets in the Mikunis made it cough and stumble off idle.
The new 20 pilot jets have totally cured that problem and it carburates perfectly now. Result!
I also road tested the new bar end mirrors. Being weighted they reduce vibrations in the handlebar and also give a clear view, even if they are smaller than normal.
Time to get riding now.