+1
The smaller front tire improves the rake angle, especially combined with the larger Bridgestone Excedra Max 240/55R16 rear!
How Rake and Trail Effect Your Motorcycle's Handling - Motorcycle Superstore
The smaller front tire "steepens" the head tube angle which makes for quicker steering - A more "slackened" head tube angle increases straight line stability & comfort
With the 140 on the front, mine absolutely has a difference that can be felt in the nimbleness of the bike. Although it now manuevers much better/easier, IMO it is no less stable or comfortable on the long haul. just did 1160 miles doing the 3 sisters ride in Leakey, Tx with many very tight twisties & ups/downs in the twisties - the 790 miles Down there & back were no less comfortable either.
Go 140/75R17 Avon Cobra front with the Emax rear - lots on here have & report the same results