You might want to have a look at the FD parts breakdown to see how the lateral force applied by running a CT is going to affect your FD, along with the additional 4lbs minimum your setup has over stock. You ARE loading the bearings in a way they were not designed to be loaded.
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I simply had to return to this post and address your comment regarding "Lateral Force" and the "loading of bearings" because of the additional "4lbs minimum over the stock wheel/tire.

After some research I was able to glean some great info on actual motorcycle tire weights from E-Tires Unlimited. I have to laugh because according to your assumption my FD bearings are in jeopardy of failure due to the increased weight of the 18lb G-MAX. Your assumption also suggest that any tire which weighs more than 15.5lbs (actual weight of the stock Bridgestone G704) is "overloading the bearings.

As a refresher the stock F6B tire/wheel weight is 34lbs. The Bridgestone 180/60-R16 G704 weighs 15.5lbs. Quick math, 34lbs minus 15.5lbs gives a wheel weight of 18.5 lbs.

Now the best part Your suggestion, that any wheel/tire combination exceeding 34 pounds total weight should not be used, has eliminated five of the six tire manufactures who have "recommended tires" for the Goldwing/F6B

Bridgestone G704 180/60 R-16.......15.5lbs

Metzeler ME880 180/60 R-16..........18lbs (same weight as G-MAX CT)

Pirelli Night Dragon 180/65-16........20lbs
180/70-16.......22lbs

Shinko SE890 180/60-R16..............20lbs

Michelin Commander II 180/65-16...21lbs

Dunlop Elite 3 180/60-HR16............22lbs

Wow! Guess Wing/F6B riders really have only one choice in a cycle tire, that being the 15.5lb Bridgestone G704

In ending, I'll leave "Lateral Force" to "front steering tires"