Ken, for those who like to ride the F6 and the Wings like we do, I make a rear shock clevis that is a 1/4" longer than stock so it raises the bike up a little higher than stock. I believe the rear spring on the F6 is way too soft (the Wing too) and should be a stronger if you like to ride the twisties at a spirited pace. On my bike, I have a Penski rear shock with a stronger spring and a longer shock clevis. The front frorks have AK-20 kits in them, 1.1 KG springs, fork brace and the fork tubes are pushed dowm 10mm in the triple trees. The result is much greater ground clearance and I had to make the kickstand an inch longer. It almost handles like a sport bike now.
A common misconception, is that slightly stiffer springs make the ride harsher, not true, it mearly makes the bike ride higher in the suspension instead of bouncing off the botton of the travel like a stock bike.